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March 10th 2009 council packet
City of Lake Elmo City Council Workshop 3800 Laverne Avenue North Lake Elmo, MN 55042 March 10, 2009 6:30 p.m.-8:30 p.m.(?) 1. Agenda 2. Lake Elmo/Highway 36 Interchange Project-Presentation by Washington County 3. Comprehensive Plan Chapters a. Transportation b. Surface Water.Management 4. Adjourn City Council Date: March 10, 2009 WORKSHOP Presentation Item No. 2 ITEM:; Receive a presentation from Washington County on the proposed alternatives for the Trunk Highway 36 and Lake Elmo Avenue (CSAH 17) Interchange SUBMITTED BY: Jack Griffin, City Engineer REVIEWED BY: Craig Dawson, Interim City Administrator Ryan Stempski, Assistant City Engineer SUMMARY AND ACTION REQUESTED: The city council is being asked to receive a presentation on the TH 36 and Lake Elmo Avenue Interchange design alternatives. Washington County will be providing the Council with background information and will present 3 design alternatives that were discussed with the Design Review Committee (DRC) and Project Management Team (PMT), Washington County will ask for input from the Council on the 3 design alternatives. The process and schedule for the Council to make their formal decision will be discussed. BACKGROUND In 2002, MnDOT adopted the IRC Corridor Plan for TH 36. The City of Lake Elmo submitted a resolution opposing this plan. The first improvement project implemented for this plan was the Keats Avenue and TH 36 - 3/4 intersection. When this project was constructed, significant concern was expressed by Lake Elmo residents. The Council received a presentation from MnDOT and Washington County on June 12, 2007 regarding the TH 36 Corridor Plan. It was discussed that the next proposed project included the construction of an Overpass at TH 36 and Lake Elmo Avenue, The Council requested that this intersection receive an interchange to maintain TH 36 access. Since that time, Washington County initiated a Design Review Committee and a Project Management Team, both consisting of Lake Elmo representation, to set goals and review design options to accommodate an interchange at the intersection of TH 36 and Lake Elmo Avenue. The alternatives have been narrowed down to three and the County would like to select one option so that they can pursue the additional funding necessary for the project. ORDER OF BUSINESS Introduction Craig Dawson, Interim City Administrator Presentation Washington County Questions to the presenters Mayor and Councilmembers Questions from the public Mayor facilitates No action required City Council Date: March 10, 2009 WORKSHOP Presentation Item No. 3 ITEM: Receive presentations on the Draft Transportation Plan and the Draft Surface Water Management Plan SUBMITTED BY: Kyle Klatt, Planning Director and Ryan Stempski, Assistant City Engineer REVIEWED BY: Craig Dawson, Interim City Administrator Jack Griffin, City Engineer BACKGROUND In December of last year, the Metropolitan Council granted the City of Lake Elmo's request for an extension until May 29, 2009, to update its Comprehensive Plan and submit the document for comment, The initial request to the Metropolitan Council was for a two-year extension that would have given the City until December 31, 2010, to complete the required updates. The later deadline was sought to provide additional time to incorporate information from the Village AUAR planning process. With the decision by the Met Council to grant a shorter extension, the scope of the proposed work has been scaled back by removing any Village area updates (which can be processed, if needed, at a later date). Therefore, the goal of the proposed updates is to complete the minimal requirements of the Metropolitan Council's System Statements and watershed districts in order to comply with the May 29th deadline. All plans will be completed on the basis of the current land use plan adopted in 2005. As required by the Metropolitan Land Planning Act, local governmental units must have prepared a comprehensive plan to be reviewed and approved by the Metropolitan Council within three years following the receipt of the metropolitan system statement. The official issue date of the City of Lake Elmo's system statement was September 12, 2005. To ensure that the City complies with the May 29, 2009 extension deadline, the comprehensive plans for transportation, wastewater(includes surface water and water supply), and regional . parks must be updated in accordance with the Metropolitan Council's System Statement. STATUS ON OTHER COMPREHENSIVE PLAN ELEMENTS • TKDA is working on the Comprehensive Water Plan and will present this plan in Draft form at the April 14th City Council Workshop. • The recently completed City parks and trails plan was sent to the Met Council for comment and these comments will be incorporated into the final comprehensive plan update by the City Planning Department. • The Metropolitan Council's Systems Statement for Lake Elmo includes details that have previously not been incorporated in the Comprehensive Plan, including some requirements for septic systems (both individual sewage treatment systems and communal systems), solar access, and implementation. Staff will be working with the Met Council to determine the extent to which these details need to be addressed with the updates currently being prepared by TKDA. The City also needs to determine the most appropriate way to incorporate the new sections into the existing Comprehensive Plan. The Planning Department has been assembling an electronic version of the current plan and will be communicating with the Met Council to determine its expectations regarding the appropriate format of the final document submission. EXPLANATION OF SYSTEMS STATEMENTS System statements explain the implications of metropolitan system plans, such as sewer, for each individual community in the metropolitan area. They are intended to help communities prepare or update their comprehensive plan. The system statement includes forecasts at densities that assure regional growth is achieved consistent with adopted policies. The system statement also contains an overview of the transportation and aviation, transit, wastewater, and regional parks system plan updates, and system changes affecting each community. The following forecasts are part of the 2030 Regional Development Framework(adopted January 14, 2004, and updated on August 24, 2005). They are used by the Met Council to plan for regional systems. The Met Council requires local communities to base their planning work on these forecasts. Forecast of Lake Elmo's population, households and employment: Revised Development Framework 1990 2000 2010 2020 2030 Population 5,903 6,863 9,952 18,403 24,000 Households 1,973 2,347 3,619 6,324 8,727 Employment 1,011 1,636 2,250 7,200 14,000 The May 29, 2009, deadline represents the date that the plan must be submitted to the Met Council. There would still be a mandatory 6—month review period for adjacent communities that would commence on this submission date. PRESENTATION SUMMARY AND DIRECTION REQUESTED Transportation Plan The City Council will be presented an in-progress DRAFT of the Transportation Plan. The presentation will give an overview of what is included in the Plan based on the requirements of the Met Council, State Statutes, and Washington County, The Draft Goals and Policies of the Plan will be presented and council input will be requested. A schedule to complete the plan will be presented and has been attached. Staff will address comments and questions from the Council regarding the Transportation Plan. In addition, staff will be requesting direction from the Council to distribute the Draft Transportation Plan to Washington County and the Metropolitan Council for their preliminary comments only, Early feedback from these stakeholders will be important to maintain the schedule. Please note that final submittal will occur on May 29 for the official 6—month review process. Surface Water Management Plan The City Council will be presented a DRAFT of the Surface Water Management Plan (SWMP). The presentation will give an overview of what is included in the Plan based on the requirements of the Met Council, State Statutes, and Watershed Districts. Staff will be seeking Council input on the Goals and Policies stated in the Plan for the City of Lake Elmo. A draft copy of the SWMP and the schedule to complete the plan has been attached. Staff will address comments and questions from the Council regarding the SWMP. In addition, staff will be requesting direction from the Council to distribute the Draft SWMP to the watershed districts (Valley Branch, Brown's Creek, and South Washington) and the Metropolitan Council for preliminary comments only. Early feedback from these stakeholders will be important to maintain the schedule. Please note that final submittal will occur on May 29thfor the official 6—month review process. ATTACHMENTS 1. Transportation Plan Project Schedule 2. SWMP Project Schedule 3. Draft Surface Water Management Plan ORDER OF BUSINESS: Introduction Kyle Klatt, Planning Director Transportation Plan Presentation Bryant Ficek, TKDA Questions from city council members to the presenter Mayor and council members Questions/comments from the public to the city council Mayor facilitates SWMP Presentation Sherri Buss, TKDA Questions from city council members to the presenter Mayor and council members Questions/comments from the public to the city council Mayor facilitates CITY OF LAKE ELMO 2009 TRANSPORTATION PLAN TKDA PROJECT NO. 14288.000 PROJECT SCHEDULE December 9, 2008: City Council Meeting • Authorization of Transportation Plan January 2009: Washington County Transportation Meeting • Date TBD to discuss county issues February 10, 2009: • Draft Transportation Plan to City Staff March S, 2009: • Workshop Agenda Item Due March 10, 2009: City Council Workshop • Provide update to City Council on the Transportation Plan • Authorize distribution of Draft to Washington County and Met Council IF Council is comfortable with policies OR determine when this distribution is appropriate April 14, 2009: City Council Workshop • Provide update to City Council on the Transportation Plan if necessary April.,2009: • Receive comments from Washington County and Met Council • Incorporate minor comments May 1,2009: DRAFT TRANSPORTATION PLAN COMPLETE May 12, 2009: • Agenda Item Due May 19,2009: City Council Meeting • Present Final Transportation Plan to Co-Lincil • Authorize distribution to Met Council May 29, 2009: SUBMIT FINAL TRANSPORTATION PLAN TO MET COUNCIL Page 1 of 1 CITY OF LAKE ELMO 2009 SURFACE WATER MANAGEMENT PLAN TKDA PROJECT NO. 14287.000 PROJECT SCHEDULE December 9,2008: City Council Meeting • Authorization of Surface Water Management Plan January, 2009: Meet with Watershed Districts • VBWD —January 22, 2009 • SWWD --January 27, 2009 • BCNN D —Via phone conversation February 10, 2009: • Draft S v i/Wi to City Staff March 5, 2009: • Workshop Agenda Item Due March 10, 2009: City Council Workshop • Provide update to City Council on SWMP • Authorize distribution of Draft to Watershed Districts and Met Council IF Council is comfortable with policies OR determine when this distribution is appropriate April.14, 2009: • Provide update to City Council on SWMP if necessary April, 2009: • Receive comments from Watershed Districts and Met Council • Incorporate minor comments May 1,2009: DRAFT SWMP COMPLETE May 12, 2009: • Agenda Item Due May 19,2009: City Council Meeting • Present Final SWMP to Council • Authorize distribution to Met Council May 29,2009: SUBMIT FINAI. SWMP TO MET COUNCIL Page 1 of 1 I f DRAFT PLAN LOCAL SURFACE WATER j MANAGEMENT PLAN f <, r City of Lake Elmo, Minnesota fMarch 2009 Project No. 14287.000 I CITY OF LAKE ELMO � TKDAl ENGINEERS•ARCHITECTS-PLANNERS i Lake Elmo Comprehensive Plan ChapterX--Local Surface Wafer Management Plan TABLE OF CONTENTS I Page No. EXECUTIVESUMMARY............................................................................................................. 1 A. Purpose and Scope............................................................................. .. ... .2 1. Purpose. . . .....................2 2. Scope....................................................................................................................2 3. Surface Wafter Related Agreements......................................................................2 lB. Physical Setting ............................................................................................................5 1. Location,Population and History...:.....................................................................5 2. Topography. 5 3. Soils............................................. . .....................................................................7 Ground 4 4. Climate ...................................................................................... 14 S. Climate .................. 1 6. Surface Water Resources....................................................................................17 7. Floodplains.........................................................................................................22 8. Natural Resources...............................................................................................25 9. Storm Water System........................................................................................... 31 10. Planning and Development........................................................................... 36 C. Regulatory Setting.......................................................................................................39 1. City of Lake Elmo..•.......................................................................... .39 2. Washington County. .................39 3. Washington County Department of Parks and Recreation.................................39 4. Washington Conservation District.......................................... ......40 5. Watershed Management Organizations..............................................................40 6. Metropolitan Council..........................................................................................44 7. State Board of Water and Soil Resources (BWSR)............................................44 8. Minnesota Pollution Control Agency(MPCA) ..........45 ........................................ 9. Minnesota Department of Natural Resources (MnDNR)...................................46 10. Minnesota Department of Health(MDH) ..........................................................46 11. Minnesota Environmental Quality Board(EQB)...............................................46 1 12. Minnesota Department of Transportation(MnDOT).........................................46 13. U.S.Environmental Protection Agency(USEPA).............................................47 14. U.S.Army Corps of Engineers(USACE)..........................................................47 15. Federal Emergency Management Agency (FEMA)...........................................47 16. Natural Resource Conservation Service(NRCS) .........47 ...................................... 17. U.S. Geological Survey (USGS) ........................................................................47 18. U.S.Fish and Wildlife Service(USFWS)..........................................................47 D. Related Studies,Plans,and Reports ............................................................................48 1. Comprehensive Plan...........................................................................................48 2. Brown's Creek Watershed District Watershed Management Plan.....................48 3. Valley Branch Watershed District Watershed Management Plan......................48 f Page i 14287.000 Lake Dino Comprehensive Plan ChapterX—Local Surface Wafer Management Plan 4. South Washington Watershed District Watershed Management Plan................49 E. Goals and Policies.......................................................................................................50 F. Assessment of Problems and Corrective Actions........................................................54 1. Valley Branch Watershed District Area.............................................................54 2. South Washington Watershed District Area—,...................................................58 3. Brown's Creek Watershed District........................................I............................59 4. Impaired Waters.................................................................................................59 r . 5. Groundwater Issues............................................................................................61 ? 6. Natural Resource Issues .....................................................................................63 G. Implementation............................................................................................................65 . 1. Actions to Address Identified Issues..................................................................65 2. Funding Mechanisms..........................................................................................66 f' 3. Capital Improvement Plan(CIP)........................................................................67 4. City Ordinances..................................................................................................67 5. City Process........................................................................................................67 r, H. Administration.............................................................................................................69 1, Review and Adoption Process............................................................................69 2. Plan Amendments and Updates..........................................................................69 !: I. Appendix.....................................................................................................................70 6, LIST OF TABLES `' Page No. i' Table No. 1:Lake Elmo Population Trends......................:.....................................................5 C Table No. 2:Public Waters,Lakes,and Wetlands................................................................17 . Table No. 3: Impaired Waters in the City of Lake Elmo and Its Drainage Areas...............60 LIST OF FIGURES �- Page No. I Figure No. 1:Location Map...................................................................................................4 FigureNo.2:Topography......................................................................................................6 Figure No.3•Hydrologic Soils Groupr FigureNo.4:Aquifer Sensitivity.........................................................................................13 Figure No.5:Normal Monthly Precipitation........................................................................W r Figure No.6:Average High and Low and Extreme Temperatures ..............15 Figure No.7:Average Monthly Snowfall............................................................................15 Figure No. 8:Average Monthly Heating Degree Days........................................................16 Figure No.9:Average Monthly Cooling Degree Days........................................................16 r Figure No. 10:Public Water Inventory................................................................................20 Figure No. 10: Public Water Inventory.................................................................................20 Figure No. 11: Wetland Inventory.........................................................I..............................21 Page 1i 14287.000 f i If i . f Lake Elmo Comprehensive Plan Chapter X—Local Surface Wafer Management Plan i l Page No. fFigure No. 12: FEMA Flood Zones......................................................................................24 Figure No. 13: Natural Area Priority....................................................................................28 Figure No. 14: Current Land Cover in Lake Elmo...............................................................29 I Figure No. 15: Greenway Corridors in Lake Elmo...............................................................30 Figure No. 16A:Storm Water System(NW Area)...............................................................32 Figure No. 16B:Storm Water System(NE Area)................................................................33 Figure No. 16C:Storm Water System(SW Area)................................................................34 Figure No. 161):Storm Water System(SE Area).................................................................35 Figure No. 17:Existing Land Use........................................................................................37 Figure No. 18:Future 2030 Land Use..................................................................................38 JFigure No. 19: Watershed Authorities..................................................................................43 } Figure No.20: Impaired Waters...........................................................................................64 f : LIST OF APPENDICES Pages ' A. Lake Inforznatian Reports........................................................................................ . .1 S B. Floodplain Comparison Map. . .. .1 C. MS4 Permit..................................................................................................................33 I D. City of Lake Elmo SWPPP..........................................................................................51 ' E. Capital Improvement Plan 2009—2013 ....11 F. Agreement for Stormwater Facilities between Oakdale,Lake Elmo,and VBWD......12 G. Construction Site Stormwater Runoff Control Ordinance Extension Letter.................. I H. Wellhead Protection Plan-Part I.................................................................................66 I. Wellhead Protection Platt-Part 11...............................................................................83 J. Development Process Informational Handout...............................................................5 K. Floodplain Ordinance...................................................................................................I I L. Wilmes Lake Flooding Issues Study and Maps from SWWD.......................................3 LIST OF ACRONYMS The following acronyms are used in this Report: I , Acronym Description AUAR Alternative Urban Area-wide Review BMP Best Management Practice BWSR Board of Water and Soil Resources BCWD Brown's Creek Watershed District CIP Capital Improvement Program CWA Clean Water Act f Page w 14287.000 i Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan Acronym Description EQB Environmental Quality Board FEMA Federal Emergency Management Agency FHBM Flood Hazard Boundary Map FIRM Flood Insurance Rate Map FIS Flood Insurance Study JPA Joint Powers Agreement ` LGU Local Government Unit LSWMP Local Surface Water Management Plan LID Low Impact Development MCBS Minnesota County Biological Survey MDH Minnesota Department of Health F MNDNR Minnesota Department of Natural Resources 4 MNDOT Minnesota Department of Transportation MLCCS Minnesota Land Cover Classification System F MPCA Minnesota Pollution Control Agency MS4 Municipal Separate Storm Sewer System(NPDES) NFIP National Flood Insurance Program NPDES National Pollutant Discharge Elimination System r NWI National Wetlands Inventory NRC5 Natural Resources Conservation Service OHWL Ordinary High Water Level PWI Public Waters Inventory RSEA Regionally Significant Ecological Areas SDWA Safe Drinking Water Act r SWCD Soil and Water Conservation District SCS Soil Conservation Service,USDA(replaced by NRCS) ` SWWD South Washington Watershed District SFHA Special Flood Hazard Area r SWCA Special Well Construction Areas L STIP State Transportation Improvement Plan SWPPP Storm Water Pollution Prevention Plan r SWMP Surface Water Management Plan L„ TMDL Total Daily Maximum Load TP Total Phosphorus TSS Total Suspended Solids TCE Trichloroethylene L.v USACE United States Army Corp of Engineers USEPA United States Environmental Protection Agency USFWS United States Fish and Wildlife Service USGS United States Geological Survey VBWD Valley Branch Watershed District VOCs Volatile Organic Compounds WCD Washington Conservation District WD Watershed District WMO Watershed Management Organization WMP Watershed Management Plan WCA Wetland Conservation Act , WMA Wildlife Management Area R" Page iv 14287,000 to t<.. Lake Elmo Comprehensive Plan Chapter)(—Local Surface Water Management Plan EXECUTIVE SUMMARY This Surface Water Management Plan will help to guide the protection and management of surface waters,ground water, and related natural resources in the City of Lake Elmo. The plan has been developed as a part of the City's 2030 Comprehensive Plan,to meet the requirements of the State Statutes,the Metropolitan Council, and local Watershed Districts. The City is included within three Watershed Districts-the Valley Branch Watershed District, South Washington Watershed District, and Brown's Creel-,Watershed District. The City concurs with the watershed management plans and standards that have been adopted by these districts, and adopts them by reference in this plan. The current plans of these organizations were used to developseveral sections of this plan. The City p Y discussed the water management issues identified by the Districts in Lake Elmo in the Watershed Plan, and this plan includes goals,policies,and implementation actions to address those issues and others identified by the City. The plan includes an inventory of surface waters and natural resources within the City. Approximately 10 percent of the City is covered by Iakes and wetlands. The City also includes several creeks,which drain to Valley Creek,an important trout stream in the Metro Area. Local Watershed Districts,the Minnesota Department of Natural Resources (MnDNR), and the City have identified significant natural areas and a greenway corridor that connects these resources in Lake Elmo. I . The goals and policies indicate that the Watershed Districts will continue to take the primary regulatory role in surface water management within Lake Elmo. The three organizations will take the primary role in permitting for development projects. The City will provide comments to the watersheds during the review process. The City will implement its adopted MS4 Permit and SWPPP to manage and maintain the surface waters and infrastructure in the City, and educate its residents about the importance of protecting surface and groundwater resources. The goals,policies,and Implementation Plan note that the City will enforce its zoning and subdivision ordinances to assist in maintaining or improving the quality of surface and ground waters within Lake Elmo.The City will update its code as noted to ensure that it meets the requirements of the Metropolitan Council and to be consistent with the Watershed Management Plans and standards. The City will continue to cooperate with local Watershed Districts,the Washington Conservation District,the County, its residents,and others to protect and enhance surface water, ground water and natural resources for current and future generations. Page 1 14287.000 f Lake Elmo Comprehensive Plara Chapter X--Local Surface Water Management Plan f 1. A. Purpose and Scope Y. Pub The purpose of this Surface Water Management Plan(Plan)is to serve as . a comprehensive planning document to guide the City of Lake Elmo in conserving,protecting, and maintaining the quality of its natural and water resources. This Plan recognizes the numerous entities involved in water resources management and environmental protection and has been L created to meet the provisions of Minnesota Statutes §473.157 and §103B.235. It also conforms to Minnesota Rules 8410, and to the rules ; and standards of the Valley Branch, South Washington,and Brown's Creek Watershed Districts. L " The Plan avoids duplicating efforts of others by adopting or referencing the standards and policies of the Brown's Creek Watershed District (BCWD), Valley Branch Watershed District(VBWD), South Washington Watershed District(SWWD),the Metropolitan Council, State of r Minnesota Agencies such as the Minnesota Pollution Control Agency (MPCA), the Minnesota Department of Natural Resources(MnDNR),the Minnesota Departmentt of health(MDIT)and the Board of Soil and Water Resources(BWSR),plus Federal Agencies,most notably the Environmental Protection Agency(EPA). This plan may be periodically amended to remain current with local practices and policies. .y 2. Scope To achieve its general goal of protecting and improving the quality of City surface waters,the Plan includes specific goals for surface and ground water management. r- E E_3 Each of the goals has one or more corresponding policies.A policy is a specific means for achieving established goals.The Implementation Plan is prioritized to focus on the policies that the ' City can most effectively implement. There are several policy areas where the City will work in cooperation with others to achieve the goals for surface waters and related resources. 3. Surface Water Related Agreements � The City of Lake Elmo is adopting the Water Management Plans,rules and standards of the three Districts within the City in this LSWMP by reference in this plan.The watershed organizations manage permitting within the City,and the City provides comments on development proposals and other permit applications. j Page 2 14287.000 L Lake Elmo Comprehensive Plan Chapter —Local Surface Water Management Plan The Valley Branch Watershed District(VBWD)serves as the local governmental unit(LGU)for the Wetland Conservation Act(WCA)in the area of Lake Elmo within VBWD. The City is the LGU for the WCA within the BCWD and SWWD areas. The City utilizes the services of the Washington Conservation District(WCD) in carrying out its responsibilities under WCA. The WCD provides services to administer WCA, including wetland determinations,reviewing wetland delineations and impact applications,providing recommendations to the City, preparing notices of application or decisions, and other administrative tasks. The City has an approved MS4 Permit and SWPPP, and is implementing the SWPPP requirements, Copies of these documents are included in the i Appendix. l The City of Oakdale,the City of Lake Elmo,and the VBWD entered into a joint powers agreement for storm water management for the 3M property on the east and west sides of Ideal Avenue(in Lake Elmo and Oakdale,respectively).Discharge rates must be compliant with this agreement for any future development of this area.A copy of the agreement is included in the Appendix. 1 : i � [ { Page 3 14287.000 Marine on St. Croix i Blaine Ce::;:::::�> nterville Lino Lakes Hugo May Twp. Ci cle Pines Blaine 61 White Bear T i North Oaks D Mwo d Stillwater Twp. Grant Shoreview We Bear, P. Mahtomedi I I WWI Bear Lek � adnais Heigh 'Gem ke Bircw od1Villa e ilf n i e Stillwater - - ---- - PIn@ S 36 Litt[ Canada . �:'�; ;�:; a Parkeights Roseville lewood is ,; l Ba Paul `: �;;%/;'� ';-;i;�;;;�; i Ypo Baytown Twp. Falco Heights -- ------ I,,�":'/;;'•:�;;;,,,i;;!;;:a --— Oakd le West Lakeland Twp. t. Pa - Lakela d hor s ak�/ elan 52 Lake St. Cro x Beach I le St. Ma s in Vest St. Pa I Woodbury Afton 7 endota outh St. Pau M ndot Heights I Ne port Sunfish ke Inver rote Heights Eagan Cottage Grove Denmark Twp. t. Paul Park Grey Cloud',lsland Twp. i Ugis\LAKEELMO\PROJECTS\2009 SWMP\Maps\Figure 1-Location Map.mxd FIGURE 1 : Legend LOCATION MAP N I����%! City of Lake Eli-no Surface Water Management Plan W E Highways 2030 Comprehensive Plan S City of Lake Elmo, Minnesota CITY OF I 0 1 2 4 LAKE Map date- February 2009 '� Prepared by.- Miles JL 1. r' LIMITATION OF LIABILITY This document is not a legally recorded map or survey and is not -- intended to be used as one. This map is a compilation of records ENGINEERS•ARCHITECTS•PLANNERS and information from various slate,county,and city offices,and other sources. Sources:Metropolitan Council, TKDA I� Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Manageinent Plan i B. Physical Setting 1. location, "opulation and History ' The City of Lake Elmo is located in central Washington County in the eastern portion of the Minneapolis-St.Paul Metropolitan Area as shown in Figure 1.The City of LaIce Elmo was established in 1969. The City is home to four priority lakes,varying in size from 87 to 257 acres.The City f also includes some high quality natural areas and rare species.Many of these areas are within the Lake Elmo Regional Park Reserve. Between 1970 and 1980,Lake Elmo experienced a significant increase in o the number of households(84/0). Development slowed during the 1980s and 1990s (17 - 19%increases in households),and is forecasted to grow significantly through 2030 as shown in the table below. Much of the growth is expected to occur within the Old Village Area. Table No. 1: Lake Elmo Population Trends Year Population Households 1970 3,542 918 _ 1980 5,296 1,687 1990 5,903 1,973 2000 6,863 2,347 2010 9,952 3,619 2020 18,403 6,324 2030 24,000 8,727 Sources:U.S.Census,Metropolitan Council 2. To rot_graphy The topography of Washington County is dominated by hills of the St. Croix moraine,which was created during the late Wisconsinan glaciation. The moraine was formed as the edge of the glacier,which was obstructed by the rise in bedrock elevation toward the edge of the Twin Cities basin, stabilized its position. As the glacier retreated,ice blocks left behind were buried in topographic lows on the bedrock surface.The gradual melting of these blocks of ice created many depressions and lakes. Some of these I wetlands and lakes are visible throughout Lake Elmo today. There are areas of steep slopes surrounding the lake system in Lake Elmo located generally from the northwest corner of the City towards the southeast corner. Steep slopes are also found in the area around Goetchel Pond in the northeastern part of the City.The topographical and slope characteristics in the City are shown on Figure 2. f . Page 5 14287.000 Grant Pine 36 Stillwater j Sp gs - - - -. -- _ KlaM er Pond Oak i' Park Heights I ' DeMontreville - r „ � ;J==-=/i, =• 1 ;�,; Clear. CIO i { • -r Olson - - Jane Dirk's Pond Goptschel Deer PondHedge's Pond _ Berschen`s Pond - Baytown Crombie Pond - Twp. Sunfish t + c Friedrich Pond Oakdale ( �, ../ ! �_�• ��.5.>—[ �M F r�'�`���,d't ` J���y •r`'.`.� L(�\'rrl� .�• ft+`7�t��i `' i r;--if ) ?.:: TPA 6 ��! Ve (�� `t C V;� _ I�,I ,. Legion Pond + l�,, r \ 1 J f b S.1 ,� 1}• 1` •�"••l_-v ~�•l i v (%''1�t.,1�J '\`�j',� �� -� l.' 1 n�r (,,i`i J _ ✓j' n (/ _ � -� '`, -��J� I�\+, t•--' ���r l r 1 r J .1! {` y� � I✓;��+�' '�. cl 'r'-�1•-"'..�A�r ��!- � r 'I� � � j �,- 4 r"' r r r"rF •\' ��r P ^-• I".%�'�,l t� '�r•,J ..J �.� 1 �i r I �,�, ,J. i `� r }'�`r�ll iit -..�, (. -,��-t Y y� r �,�5.- •.' L-J 1•'"l� � `! 'c� r-� .7/fir t --�' r 1._ ��!.r� y ''l� I �v�l�_. , �} „j11'-. �y r 1. tf't�t._.•'=-� � � (�`, } 1 i� YP ^l J, `'C,� � Qy^ ,�(+';r�_; I I � `��) (/ z..�a.„�,,,, Downs ji �� t���! �')��7� `�"• �-•^"' fr .� ,,J riC:t��;\!�L•, �`'I � ' r I I C - t •,, r �,.��'�+Jv_�,,,:-' I t +'+ .�•y-r c + ' iJ I ' `- 1 }✓{ l '-.� ,17 \�\�`.rt;;ti �t�.'�,�_ r •7 -�.��,';uu f_C'_ �-•`� .1�7r f .C�d�'�) ` ��^•A� ��/`V 1 �; rj- yr" _'(. i I Eagle Point�l --INC i West _�,o-c r �1��•� ti �, i- }rN r �v� 1 ` tit �_ 'r' '%`�"ice --' , Lakeland -� ✓� 4 r'cj oa`icL.7 a Twp. F 't•.(,' lEY f 1 c�"i`:'� IJsJyr'��.�rr r +`�• I r ` `^-• r,- j , -.. � `_ r`'i�„''�--�.�„J\kl i.�l.`_'`-,�• �`�x'%�'�',I'I.�1� O�l _ 1y.�a,•r I,L;J� ��G���f'1��. � + � • Horses oe _ � �� I v, t n t / 1el / r, J';� 'v '-''�� "+ i'��' \-i✓--w `�:?11 �,Lj"',% ,� '•� _� `'��� r I(j� `�•, 41 ���tom'`:,/ �:�. % ' - r`• y,� •`Zt �v Armstrong Ay� lJ '\ rJ)l-- I�`��� -.,�- '�� \J' ^���• ...Gv-^••,-�,�.J'\�,'✓.'-�+f'v+^ac�'•r� I� l:��1` � •( I,���� 7� ( )�,�'� � ���\r^ ' •, c;f'+r;�-;r l / l� / ✓ v 'l� i - ,4( Y� _rY l l �'r_'�'--.'-. --•e,�7� ;.-\i\�{��l�tJ�L�+(����i.'� j - .�..._.--„+ \_�)-1,�;n �;a��t� .'%If� i� �. rj ';7 - ''; 1 � '7 r� ram/--,.I-�l�. i�.+^ �a 4.l' �,y` .. ..` ,�_.-- � _�_ c• 'x'-, .� - t _� � ram— ,.•�' \ �, � 1 a.r a'._.• `� \ �,a��l `1� 4 _�!``Ll!-'�c�•• .1 I� w� �'1„ /% ��!. J �,�\•i l`! ���,`�,"\'` �+� `-.! �' ,I,.`C �j�f r�J J�i s��i�::ice�� � tl�• -------------- Woodbury I Afton KAgis\LAKEELMO\PROJECTS\2009 SWMP\Maps\Figure 2-TopographyMap.mxd FIGURE 2: Legend TOPOGRAPHY N City Boundary Surface Water Management Plan W E F7 Areas where slopes of 12% to 18% are more likely to be found 2030 Comprehensive Plan S 0 Areas where slopes greater than 18% City of Lake Elmo, Minnesota are more likely to be found 10 foot Contours CITY OF Map date: February 2009 0 0.25 0.5 1 lI LAKE Prepared by: IoAJ,, °E--�-�'�� Miles :x3•i^ l TKDA LIMITATION OF LIABILITY This document is not a legally recorded map or survey and is not ENGINEERS•ARCHITECTS•PLANNERS intended to be used as one. This map is a compilation of records and information from various state,county,and city offices,and other sources. Sources:MnDNR,Metropolitan Council, TKDA I f Lake Elmo Comprehensive Plant ChapterX—Local Surface Water Management Plan 3, Soils The Soil Conservation Service(SCS),now the Natural Resources Conservation Service (MRCS),published the Soil Survey of Washington and Ramsey Counties in 1980. The publication provides soil location maps and information on the physical properties of soils found in both Washington and Ramsey County. INRCS has identified three soil associations(soil patterns)within the City of Lake Elmo.A general description of these associations is given below. Antigo-GhetekMahtomedi Association—These soils are formed dominantly in outwash.They are described as nearly level to steep,well drained to excessively drained,medium textured to coarse textured soils; Imostly on outwash plains.These soil types are located in the north central and south eastern areas of the City as well as a small portion in the southwestern area of the City. Santiago Kingsley Association—These soils formed dominantly in glacial till.They are described as undulating to steep,well drained, medium textured and moderately course textured soils, and are found on I I uplands.These soils are found generally in the south western portion of the City reaching north easterly through the central area of the City. IAntigo-ConzstockAssociation—These soils are formed dominantly in silty mantle and the underlying sandy outwash and in silty lacustrine sediments.They are described as level to moderately sloping,well drained and somewhat poorly drained,medium textured soils on outwash plains and glacial lake plains. These soils are found in the south eastern corner of the City as well as the east central border of the City. A small area in the north central area also has these soil characteristics. The nature of soils comprising the top layer of unconsolidated material in I a watershed is important because soil properties are a primary factor in determining the volume of runoff associated with a given rainfall event. The NRCS Soil Survey assigns soil types to a hydrologic group depending on the soils ability to infiltrate water during long-duration storms.The four hydrologic soil group classifications are described below. Group A soils have low runoff potential and high infiltration rates even when thoroughly wetted.These consist of deep,well-drained sands or gravels. ` Group B soils have moderate infiltration rates and the potential for runoff. They consist of moderately-deep to deep, and moderate to well- drained soils. I Page 7 14287.000 T 1 Lake Elmo Comprehensive Plan Chapter'X--Local Surface Wafer Management Plan Group C soils have low infiltration rates and generally impede the downward movement of water. These soils have more moderately-fine to fine textures and provide greater amounts of runoff volumes when thoroughly wetted. Group D soils have very low infiltration rates and very high runoff .. potential. These soils are associated with clays with high swelling potential and soils with a high permanent water table. The hydrologic soil groups located within the City are shown on Figure 3. Land disturbing activities can change a soil's physical properties; therefore,actual conditions of a particular site may vary somewhat from the general conditions identified on the hydrologic soils map. L . i r. { L r L i L : Page 8 14287.000 r I: Pine s nt Stillwateri P 9 - '. aw Poi Oa Par Hell DeMontreville ~ lea 0 Olson Dim �ond tsc Jane q e o e Bersc Pond `' Baytown Cro bie nd r U Twp. l _ 1 Sunfish NyeY` Fri n h nd Oakdale Le on P d Elmo •:? �{ Downs Eagle Point West Lakeland Twp. H.J. w Pond r rse oe ose �$�r �Imstrbng) Goose tr --------------------------------- Woodbury on KAgis\LAKEELM0IPR0JECTS\2009 SWMP\Maps\Figure 3-HydrologicSoi1sGroupMap.mxd FIGURE 3: Legend HYDROLOGIC SOILS N Hydrologic Soils Group City Boundary Surface Water Management Plan W E A Lakes _ A/D 2030 Comprehensive Plan S B City of Lake Elmo, Minnesota B/D CITY O LAKE Map date: February 2009 0 0.25 0.5 - C ELMO Prepared by: I CID LIMITATION - TKDA ° ti LIABILITY Miles This document is not a legally recorded map or survey and is not Not Rated ENGINEERS•ARCHITECTS•PLANNERS intended to be used as one.This map is a compilation of records and information from various stale,county,and city offices,and other sources. Sources:NRCS, TKDA { { Lake Elmo Comprehensive Plan ChapterX—Local Surface Water Management Plan 4. Groundwater The groundwater resources of Washington County are contained in geologic formations called aquifers.The depth to which wells must be drilled and the amount of water they will yield depend on the ability of subsurface materials to store and to transmit water.The Prairie du Chien- Jordan,Franconia-Ironton-Galesville,Mt. Simon and Quaternary (water- table) aquifers are the most used in the County. I The Prairie du Chien and Jordan Sandstone together form the most heavily used aquifer in the County. In some parts of the County, it is up to ' 200 feet thick, Since no regional confining bed separates these two aquifers,they act as a single aquifer. In general,the ground water flows from the highest water level elevation in northern Washington County to toward the Mississippi and St. Croix Rivers. The Minnesota Geological Survey has established aquifer sensitivity ratings,related to the ability of a contaminant to reach the aquifer.Figure 4 shows the Geologic Sensitivity of the Uppermost Aquifer to Pollution and identifies these areas within the City. The City has areas of High and High-Moderate areas of sensitivity throughout the eastern and central portions of the City.Moderate,Low-Moderate,and Low areas of sensitivity snake up the remaining area within the City in the southern, western,and northern portions of the City. The City of Lake Elmo recognizes the importance of groundwater sensitivity and will work with Washington County,local Watershed Districts, and other agencies to protect local groundwater resources. The City will implement its land use plan,ordinances,and the policies included hi this surface water management plan to protect groundwater resources. Lake EImo also has two areas identified as Special Well Construction Areas(SWCA);the Baytown/West Lakeland SWCA and the Washington 4 County Landfill SWCA. } a. Ba own/West Lakeland SWCA The Baytown SWCA begins just west of the Lake Elmo Airport and extends eastward to the City of Bayport and the St. Croix River.It includes portions of the City of Lake Elmo,Baytown Township,the City of Bayport,and West Lakeland Township.The entire area of contamination in the Baytown SWCA is approximately six square miles. Groundwater movement in the area is generally west to east.Most of the existing private residential wells are within the Prairie du Chien aquifer.Bayport's municipal water supply and a few newer Page 10 14287.000 Lake Limo Comprehensive Plana ChapterX--Local Surface Water Management Plan residential developments in eastern Baytown Township have wells drilled into the Franconia aquifer. ` Volatile organic compounds (VOCs)were first found in the groundwater in 1987.Additional well sampling showed VOC 1 contamination across a wide area.In 1988,the MDH issued a well- L. drilling advisory for portions of West Lakeland Township,Baytown Township,and the City of Bayport. This advisory puts limits on the f construction of new wells, and requires additional water testing of 4 new wells.The well drilling advisory remains in effect today.It has recently been expanded to reflect the spreading of the contaminants. The main contaminant found is trichloroethylene(TCE). TCE is commonly used for metal cleaning and degreasing,and as a dry cleaning solvent.In 2004,the MPCA found a major source of the TCE contamination one mile northwest of the Lake Elmo Airport, on the site of a former metal fabricating shop in Lake Elmo. b. Lake Elmo-Oakdale Special Well Construction Area(ormerly the Washington County Landfill Special Well Construction Area) ` This Special Well Construction Area consists of two disposal areas; the Washington County Landfill and the Oakdale disposal site. The Washington County landfill is located one-quarter mile south of fi Lake Jane, in the City of Lake Elmo.Washington County owns the landfill and operated the landfill under a solid waste permit authorized in 1969.In early 1981,the MPCA received a hotline tip that hazardous wastes were placed in the landfill. Subsequent i sampling in 1981 detected volatile organic chemicals(VOCs)and sampling done by MDH in 1982 detected VOCs including trichloroethylene and tetrachloroethylene in private drinking water �. wells.In 1982,the MDH issued a well advisory of approximately .1 square mule.The advisory alerted well contractors and local officials to the problems of groundwater contamination in the area of the 1_ landfill and instructed that the MDH be contacted.before any well construction is undertaken within one mile of the area. The r° boundaries were revised in 1983 and in 1993m the advisory became a Special Well Construction Area.The landfill is located in an abandoned gravel pit and is hydraulically connected to the Prairie du Chien-Jordan aquifer.The natural ground water flow direction is generally to the southwest. The Oakdale disposal site was used in the 1940s through the 1960s for disposal of commercial, industrial,and residential wastes. Site investigations in 1980 discovered contaminants including VOCs.In 2003,perflourochemicals (PFCs)began to be investigated by the MPCA.PFCs are chemicals used in products resistant to Beat,oil, Page 11 14287.600 i Lake Elmo Comprehensive Plan Chapter)(—Local Surface Wafer Management Plan grease,and water,and which appear to be persistent in the I environment.PFCs were produced by the 3M Company(3M) at its Cottage Grove facility and wastes were disposed at the Washington County Landfill and at the Oakdale disposal site.The SWCA designation was renamed and the boundaries revised in March 2007 to include both the Washington County Landfill and the Oakdale disposal site.The site boundaries now include approximately 20 square miles. This area makes up the Lake Elmo-Oakdale SWCA. f i I 1 . 1 1 Page 12 14287.000 I - I Grant 36 Stillwater j ---- — _ ine Spring Oak j Park �' Heights Baytown Twp. Ili --------------- �r Oakdale I I 1 1 West f Lakeland I' Twp. I i I I iG I�I T I I I a I f II!I ji ��_ ____.__...-__--' - _ - _ ------------- Woodbury I Afton KAgis\LAKEELM0\PR0JECTSM09 SWMP\Maps\Figure 4-AquiferSensitivityMap.mxd FIGURE 4: Legend AQUIFER SENSITIVITY N City Boundary Surface Water Management Plan W E VERY HIGH HIGH 2030 Comprehensive Plan S HIGH-MODERATE City of Lake Elmo, Minnesota MODERATE MYOF Map Prepared date: February2009 0 0.25 0.5 LOW-MODERATE LAKE Pre b `� LOW ELMO p y' Miles TKDA VERY LOW LIMITATION t i LIABILITY This document s not a legally recorded map or survey and is not WATER ENGINEERS•ARCHITECTS•PLANNERS intended to be used as one.This map is a compilation of records and information from various stale,county,and city offices,and other sources. Sources:Washington County Digital Geological Atlas, TKDA Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan 5. Climate This City is located near the center of the North American continent, which greatly influences climate. The climate is continental, meaning cold winters and mild summers characterize the area,the result of being near the center of a large land mass. Polar air masses dominate during the winter season resulting in cold, diy weather. Warm and moist air masses, originating from the Gulf of Mexico, share predominance during the summer with tropical air masses from the desert southwest resulting in warm days and nights. The spring and fall seasons are transition periods, characterized by alternating intrusions of air from various sources. The diverse nature of the air masses impacting Minnesota's climate leads to seasonal temperature extremes within the City. The National Weather Service station at Chanhassen has published climatic summaries of precipitation,temperatures, snowfall,heating degree days and cooling degree days; all of which are summarized in Figures 5 through 9. Figure No. 5: Normal Monthly Precipitation MINNEAPOLIS_WSFO_AP,MN(215435) Normals:1971-2000 4.5 4 3.5 c — 3 c 0 2.5 — c 5 2 — a 1.5 1 — 0.5 0 - Jan Feb A4ar Apr May Jun Jul Aug Sep Oct Nov Dec Month of Year Page14 14287.000 Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan Figure No. 6: Average High and Low and Extreme Temperatures MINNEAPOLIS_WSFO_AP,MN(215435) Averages:1971-2000 Extremes:1891-2001 120 -- 100 80 60 40 m !�' v 20 CL E H 0 -20 Jan Feb Mar Apr May Jun Jul Aug Sep Oct v Dec -40 -60 Month of Year —Record High—Ave High Ave Low —Record Low Figure No. 7: Average Monthly Snowfall MINNEAPOLIS_WSFO_AP,MN(215435) Averages:1971-2000 16.0 14.0 12.0 10.0 - — 8.0 0 N 6.0 -- — 4.0 2.0 — 0.0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month of Year Page 15 14287.000 Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan Figure No. 8: Average Monthly Heating Degree Days Averages:1891-2003 1800 1600 1400 f/! 1200 N d 1000 — d 61 aoo C d 600 - - 400 200 Jan Feb Nlar Apr May Jun Jul Aug Sep Oct Nov Dec Month of Year Figure No. 9: Average Monthly Cooling Degree Days Averages:1891-2003 300 250 -- w m 200 m 150 ❑ rn 0 100 -- U 50 0 . Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month of Year Page 16 14287.000 Lake Elmo Comprehensive Plan ChapterX—Local Surface Water Managerrient Plan 6. Surface Water Resources ff Wetlands and open water are prevalent in the landscape and constitute t:.. nearly 10%of the City. The MnDNR has regulatory authority over all lakes,wetlands,and watercourses defined as public waters within the state and utilizes county-scale maps to show the general location of the _ public waters and public waters wetlands (lakes,wetlands,and watercourses)under its regulatory jurisdiction. These maps are commonly known as Public Waters Inventory(PWI)maps. The regulatory _ "boundary" of these waters and wetlands is called the ordinary high water level(OHWL).Figure 10 and the table below identify the major public ' waters located in the City of Lake Elmo. Table No. 2: � Public Waters, Lakes,and Wetlands � DNR Surface Area Maximum Lake Name Public Waters No. (Acres) Depth (t`t) DeMontreville(Lake) 82-101 P 158 24 Eagle Point(Lake) 82-109 P 154 Ehno(Lake) 82-106 P 297 140 { Horseshoe(Lake) 82-74 P 76 11 Jane(Lake) 82-104 P 154 39 r� Olson(Lake) 82-103 P 87 1.5 Sunfish(Lake) 82-107 P 73 Armstrong 82-116 W 6 Berschen's Pond 82-105 W 6 Beutel's Pond 82-399 W 3 Clear 82-99 W 25 Crombie Pond 82-386 W 7 ., Deer Pond 82-385 W 6 Dirk's Pond 82-389 W 3 Downs 82-110 W 38 �. Friedrich Pond 82-108 W 17 Goetschel 82-313 W 22 Goose 82-113 W 42 L H.J.Brown Pond 82-111 W 21 { _ Hedge's Pond 82-387 W 5 i Klawitter Pond 82-368 W 5 L " Kramer 82-117 W 28 Legion Pond 82-462 W is Rose 82-112 W 26 82-100;82-314;82-315; Unnamed Wetlands 82-316; 82-366;82-367; 198 82-369;82-370;82-371; 82-384;82-388;82-390; Page 17 14287.000 r i Lake Elmo Comprehensive Plan Chapter;;—Local Surface Wator Management Plan Lake Name DNR Surface Area Maximum Public Waters No. (Acres) Depth(f) 82-391;82-392;82-398; 82-400;82-412;82-413; 82-414;82-415;82-416; 82-417;82-418;82-419; 82-420;82-460;82463; 82-484 Sources;MnDNR, TKDA a. Lakes There are 52 lakes and wetlands within Lake Elmo that are listed as public waters by the MnDNR. Seven of these are classified as lakes and the remaining include 17 named wetlands and 28 unnamed wetlands.The public waters lakes are listed in the table above. Size and depth of these water bodies is included where available from the MnDNR.The total land area approximates 1,475 acres of public water within the City. Lake information Reports for the seven named lakes in this area are included in the Appendix.These reports are a summary of MnDNR data and describe available public access information, lake characteristics,water level histories, and water quality information. Additional information on these lakes is available from the VBWD Watershed Management Plan. { The Metropolitan Council has identified four priority lakes in Lake _ Elmo;DeMontrevilie,Olson,Jane, and Lake Elmo.The"priority lake"designation is used to focus the Council's limited resources, and to identify lakes that will require completion of a nutrient budget analysis during environmental review processes. b. Wetlands The relatively flat topography and wet soil conditions in Lake Elmo result in extensive wetland areas. Wetland community types within the City include a frill range of wetlands, from emergent wetland habitats,to scrub and shrub wetland habitats,as well as forested wetland habitats.However,the primary wetland features in the City include deep water and shallow water habitats due to the extensive lake network within the City. The wetland areas within the City are illustrated in Figure 11. Wetland areas are valuable resources that provide many benefits to the City and surrounding areas. Some of these benefits include groundwater recharge, filtration of sediments and nutrients, flood control,wildlife habitat, and scenic value. Page 18 14287.000 Lake Elmo Comprehensive Plan ChapterX-Local Surface Wafer Managetnent Plan The VBWD is currently conducting a functional assessment of wetlands within the District as a part of its adopted Watershed Management Plan. The District has adopted standards for wetland management in its Management Plan. The BCWD and SWWD have completed functional assessments of wetlands within their Districts,and set standards for wetland management in their .I Watershed Management Plans. I' C. Rivers and Streams L Raleigh Creek Raleigh Creels is the dominant stream that flows through Lake Elmo.Raleigh Creels is a major subwatershed within the VBWD.It is an intermittent stream that begins in the City of Oakdale,west of I-694 and south of TH 5.From there,water flows easterly,enters the City of Lake Elmo and crosses Stillwater i. . Boulevard near its intersection with 31 st Street North,directly east of Tablyn Park.A tributary enters Raleigh Creek from south of r. Stillwater Boulevard and just east of the Ideal Avenue intersection. In addition,the discharge from Beutel Pond enters Raleigh Creek near the Stillwater Boulevard intersection.From near Tablyn Park r and Stillwater Boulevard,Raleigh Creek flows southerly to Lake Elmo Park Reserve and the northernmost bay of Eagle Point Lake. I. VBWD has completed a Watershed Management Plan for Raleigh Creek and extensive information about this subwatershed can be found in the VBWD's Watershed Management Plan. Farney Creek and North Farney Creek. Farney Creek and North €' Farney Creek are located within the Eagle Point Lake subwatershed within the VBWD.These creeks are located south of Raleigh Creek in the City of Lake Elmo and drain into Eagle Point Lake.Farney Creek is an intermittent stream that enters the lake's west side. Additional details can be found in the VBWD's Watershed Management Plan for Eagle Point Lake. s r Page19 14287,000 Grant Stillwater 36 -- - - - Pine Springs Klawitter r` Oak Pond \ Park Height I - DeMo eviRe Clear v - � Olson. ._ /. Dirks.�` - Jane PGaetschel Hedge's Pond Bog Der H be's f� Pon Pond Beisc`hpn's Baytown II cfp ie Pond I' Pori Twp. ` I Sunfish I II - I _ tel ;- I \' nd (Ptiedrich's Oakdale I sf I Legion Pond I eN i Elmo ;� Eden 5 No,7h Cte 1 Park Downs 'tea e`l Pond ey Fail - � _( ; Creek Eagle Point - �alre�Gi'o I argaret West Lakeland Twp. H.J. Brown,Pond __. 'Hors Arms t j Rose l Goose I I Kramer - ------ -------------- -- dw I Woodbury Afton ' K:\gis\LAKEELMO\PROJECTS\2009 SWMP\Maps\Figure 10-PublicWatersinventory Map.mxd FIGURE 10: Legend PUBLIC WATER INVENTORY N City Boundary Surface Water Management Plan W E Streams Network Public Waters 2030 Comprehensive Plan 7rS Local Roads City of Lake Elmo, Minnesota Major Highways MY OF Ma date: February 2009 LAKE p rY 0 0.25 0.5 1 ELPRO Prepared by: Miles ��TJI�L LIMITATION OF LIABILITY This document is not a legally recorded map or survey and is not ENGINEERS•ARCHITECTS•PLANNERS intended to be used as one.This map is a compilation of records and information from various slate,county,and city offices,and other sources. Sources:MnDNR, TKDA Grant .�. 7 Stillwater _ 36 _------ Pine J# _ - - II - r� 9s Klawi 'ond'= - i • � i i i .� y •� Oak / i ti�_ __P ♦ ``` , Park 7. Heights nUevAt op ,. --------- t r i _7.i i I .✓ L� s r ' CIO Olson (IN t Jane --------------- ti Deepd s d a - �� A _ Crono�td Bersch Pond Ilk. it 7. Baytown I T p 4 w , I i I _.... -0 l B �• ^I -- on i — Oakdale — A � _ i I i f . Elmo I A...I _ Downs r • I �— ..l = Po 40 ® a `_ '� ( West z -.. d Lakelan I� , et Twp. e r H.J. Pond _ • ! i ." Horses e ......... .................................. " Armstrong - - - r .I :•I - -- - !a ------------- -----------J i _..: WoodburyAfton K:\gis\LAKEELM0\PROJECTS\2009 SWMP\Maps\Figure 11-WetlandsMap.mxd FIGURE 11 : Legend WETLAND INVENTORY N City Boundary Surface Water Management Plan W E Emergent Habitat Scrub/Shrub Habitat 2030 Comprehensive Plan City of Lake Elmo, Minnesota S Forested Habitat Deep Water Habitat CITY of Ma date: February 2009 Shallow Water Habitat SAKE p Y 0 0.25 0.5 1 ELMO Prepared by: Major Highways Miles TKLlA Parcels LIMITATION OF LIABILITY This document is not a legally recorded map or survey and is not ENGINEERS•ARCHITECTS•PLANNERS intended to be used as one. This map is a compilation of records and information from various slate,county,and city offices,and other sources. Sources:MnDNR,Metropolitan Council, TKDA Lake Elmo Comprehensive Plan ChapterX—Local Surface Water Management Plan 7. I+lood��lains Land use regulations define the floodplain as the area covered by the flood that has a one percent chance of occurring each year,also known as thel.00-year flood.The floodplain is divided into two zoning districts: the floodway and flood fringe. The floodway includes the river channel and nearby land areas which must remain open to discharge the 100-year flood. The flood fringe,while in the flood plain, lies outside the floodway.Regulations usually allow development in the flood fringe but require flood-proofing or raising to the legal flood protection elevation. In 1968, Congress created the National Flood Insurance Program (NFIP) to make flood insurance available to property owners at federally subsidized rates. The NFIP required communities to adopt local laws to protect lives and future development from flooding.The Federal Emergency Management Agency(FEMA)first must formally notify a community that it has special flood hazard areas(SFHA)before it can join the NFIP.FEMA notifies communities by issuing a Flood Hazard Boundary Map (FHBM).This map shows the approximate boundaries of the community's 100-year flood plain, Each participating community has a special conversion study or a Flood Insurance Study (FIS).The FIS includes a flood plain map depicting the community's flood hazard areas. The FEMA Flood zones areas are shown in Figure 12. 1 In 2008,the floodplain data was updated by Washington County.This update revised the floodplain zones within Lake Elmo,resulting in reductions to the floodplain zone surrounding Eagle Point Lake and other areas,and increasing the floodplain zone in areas like H.J.Brown Pond, Rose Lake,and other various wetland and ponds in the City. A map showing the comparisons of the 1979 floodplain zones and the 2008 update is included in the Appendix.The revised floodplain maps will be effective in October or November of 2009. Local Issues. The VBWD Watershed Management Plan notes that Local and regional flooding has been identified as priority issues within the watershed.Flood management has been expanded to include other issues of water quantity such as flooding, low water levels,high flows, and low flows. The WD indicates that water level and floodplain management issues are dependent on the hydrology and the physical conditions of the resource.Hydrology is dependent on the weather,the topography of the landscape, the soils,the land cover,and other factors. Changes to any of these factors will influence the water levels and floodplain of a water resource/basin. While some of the factors are difficult to control,changes to land cover can be regulated and/or managed.The VBWD collects data on lake levels,precipitation records,snowpack monitoring,and groundwater levels to assist in managing the water levels and floodplains of the VBWD's water resources.In addition, flooding problems will be Page 22 14287.000 i Lake Elmo Comprehensive Plan Chapter X—Local Sutface Water Management Plan prevented through watershed standards for structure elevations,permit review, community plan review, and education efforts implemented through VBWD's Watershed Management Plan. L The SWWD Watershed Management Plan indicates that flooding f problems result witliui the watershed as a result of substantial changes in i. the natural drainage system by the construction of interconnected stormwater conveyance systems.In addition, existing developments around lakes(and other depressional storage areas)are potentially L_ vulnerable to flood damage.This connectivity allows previously landlocked areas to drain while also providing storm sewer systems which efficiently collect and convey runoff,thereby increasing the L volume and rate of runoff.New developments create impervious surfaces and further increase the connectedness of the conveyance system, # burdening existing flood storage areas. The timing of peak flows from j existing and new developments exacerbate flood storage challenges.The SWWD identifies the need to further identify and protect key flood r storage areas;implement an Emergency Response Plan for flood events; L identify critical inter-community flow crossings and assess actual flow rates as a means to address flooding problems within the watershed. The BCWD Watershed Management Plan indicates that the District has recognized that changes in flooding characteristics can impact properties and natural resources.These changes to flood storage areas result from alterations to the floodplain or outlets of water bodies or stormwater ' management facilities. There is an elevated risk of flooding if changes in adjacent land uses cause increased volumes of runoff to enter the basins. L The District identified protection of flood storage areas and management �' of floodprone areas as issues for the District.In order to address these issues,the District has set goals to ensure no net loss of flood storage capability within the District;assess the potential for flooding properties when evaluating land management activities;minimize the risk of flooding to structures within landlocked basins; and to minimize the risk of flooding on downstream properties when outlets are provided for ° landlocked basins. Existing designated FEMA Floodplain areas in Lake Elmo are identified on Figure 12.The City has adopted a Floodplain Ordinance to protect and manage these areas. r.. L Page 23 14287,000 111. Grant Pine 36= - Stillwater I Springs - ---- I , Klawitter-Pond -. Oak Park i Height DeMontrevide ------ tom; CIO t Dirk�-Fond Hid t. Deer Hedges- - i Pond. _- Pond Berschen's Pond Crombie Pond Baytown Twp. it - ! U Pond FriertlMh Pad ' { I -------------- Oakdale Le nd I - I I i and 11 i •. West ,--� `,l Lakeland Marg, � Twp. H.J. I ,Pond - .. Armstrong ! / w j _ 'Kramer fJ — — — ---------------------------------— — --- Woodbury Afton KAgis\LAKEELM0\PR0JECTS\2009 SWMP\Maps\Figure 12-FEMAFIoodzonesMap.mxd FIGURE 12: N Legend FEMA FLOOD ZONES City Boundary Surface Water Management Plan W E ® 100-year flood zone 500-year flood zone 2030 Comprehensive Plan S Public Waters City of Lake Elmo, Minnesota !r CITY OFMap date: February 2009 0 0.25 0.5 1 LA"film III, Prepared by: _ Miles TKDA LIMITATION OF LIABILITY !, This document is not a legally recorded map or survey and is not PLANNERS intended to be used as one. This map is a compilation of records ENGINEERS•ARCHITECTS �i and information from various state,county,and city offices,and othersources. Sources:MnDNR, TKDA Lake Elmo Comprehensive Plan Chapter X--Local Surface Water Management Plan 8. Natural Resources a. Land Cover,Natural Resources and Fish and Wildlife Habitat The vegetation of Lake Elmo includes woodlands and hardwood forests, and wetland conununities such as wetland prairies and wetland forests. The Minnesota County Biological Survey (MOBS) has identified some high quality hardwood forest areas that still ' remain in the City.These are located within the Lake Elmo Park Reserve and north of this area. The MnDNR has identified regionally significant ecological areas (RSEA)and several of these areas of outstanding resource quality are located within Lake Elmo. These communities are located throughout the Park Reserve and;in other areas of the community. Both the RSEA and MCBS areas are identified on Figure 13. The County Biological Survey maps also include the approxnnate locations of several rare species of animals and plants found within the City of Lake Elmo. In general,the rare species locations coincide with the remaining natural communities in the City. The Lake Elmo Park Reserve is a 2,165 acres in size(3-1/2 square miles)with 80 percent of its acreage set aside for preservation and protection.This 80 percent will eventually resemble the land as it was prior to the arrival of the settlers in the mid-1800s.This park reserve offers gently rolling hills with a variety of landscape types, including forest and prairie. Washington County manages the Park Reserve. The current land cover in Lake Elmo is identified on Figure 14, using data from the Minnesota Land Cover Classification System (MLCCS).MLCCS data is a natural resources inventory classification system that categorizes areas in terms of physical land cover.Agricultural and residential land uses predominate,along with the numerous wetlands,lakes and natural communities remaining in the City. b. Greenw4y Corridors The Metropolitan Council,the SWWD, and the City have mapped and identified Greenway and Wildlife Corridors throughout Lake Elmo. The wildlife corridors developed by the Metropolitan Council,the SWWD and City Greenways are shown on Figure 15. These corridors connect the significant natural areas identified by the County Biological Survey and the major water and natural resource areas. SWWD's Greenway proposes to connect the Page 25 14287.000 Lake Elmo Comprehensive Plan Chapter)(—Local Surface Water Management Plan regional park systems at Lake Elmo Park Reserve and the Cottage Grove Regional Park. The Lake Elmo Park Plan recommends a Greenway loop that fully utilizes trails proposed by the Comprehensive Trail Plan focusing on connectivity within the park system.The Greenway along with the trail system provides for a highly connected park system and builds connections among the rural and future urban parts of the City. The F ' Greenway loop makes use of the existing and proposed trails to create a route through the City with a unified identity as it runs through the different areas of the community.Where the Greenway r utilizes existing trails or streets with limited width,signage, and landscaping may be used as cues to let the user know to follow the Greenway. Where the trails have not yet been developed and where there is space for additional parkland acquisition, the Greenway may expand in width to allow for more significant landscaping,trees and resting places. Conservation subdivisions with open space abutting the Greenway would provide users access to views of natural and rural landscapes. The BCWD and the WCD are currently compiling a list of priority areas for the development of a County-wide conservation corridor. ' This work is anticipated to progress over the next year for the Brown's Creek Watershed District and then move forward in other areas of the Conservation District. SWWD has established a Greenway Corridor.In Lake Elmo,the Greenway extends north from Woodbury past the Eagle Point Business Park and then stretches eastward to connect to the Lake Elmo Park Reserve. The SWWD's ultimate goal is to connect the Cottage Grove Regional Park to the Lake Elmo Park Reserve via the L greenway. C. Surface Water Based Recreation and Access Water bodies within Lake Elmo provide a variety of opportunities for recreation.Public access can be found on the following lakes within the City: Lake DeMontreville provides public access on the NW shore a Lake Elmo offers access along the west shore of lake within the Lake Elmo Park Reserve • Lake Jane provides public access on the SSE shore of lake s Olson Lake provides access via a channel from DeMontreville .: Lake with public access available on the NW shore Page 26 1428Z 000 i i Lake%Imo Comprehensive Plan Chapter X—Local Surface Wafer Management Plan The Lake Elmo Park Reserve provides opportunities for recreation, I boating, camping,canoeing,fishing,trails,swimming,and nature observation.Facilities in developed areas of the reserve include an archery range,boat launch,campground,picnic shelters, swimming facilities,and trails. is 1 . I I , f : 1 l f I l is I IPage 27 14287.000 I Grant I tillwater Pfn in�� /All Klawi Pond O (Oak Park JVVVV Height DeMontreville �J lea 0 Olson Jane Dirt ond tsc Hde' Q I end e e's Pond--- - I Bersc n _ D Baytown Cron bie and Twp. If I - I I Sunfish I 63 II �� i 1 I, III u el - I nd Fri n h n �' --------- Oakdale l Le Ion P nd I d III Elmo ICI n Downs`-Park I1 Pond _11k ° Eagle Point West • � - .._ Cl/> Lakeland Twp. H.J. w and - - rse e D C� �rmstlbng) Goose a O ------- - -- - --------------- - Woodbury Afton K1gis\LAKE ELM O\PROJECTS12009 SWMP\Maps\Figure 13-Natura1PriorityAreasMap.tnxd FIGURE 13: Legend NATURAL PRIORITY AREAS N 711 7 city Boundary Regional Parks and Open Space Surface Water Management Plan W E DNR Regionally Significant Natural Areas 2030 Comprehensive Plan Moderate City of Lake Elmo, Minnesota High M Outstanding CITVOF Minnesota County Biological Survey LAKE Map date: February 2009 0 0.25 0.5 1 ELF® Prepared by:JA Hardwood Forest II Miles Forested Wetland LIMITATION OF LIABILITY Wetland Prairie t This document is not a legally recorded map or survey and is not intended to be used as one. This ma is a compilation of records ENGINEERS•ARCHITECTS•PLANNERS and information from various state,county,and city offices,and Inland Beach other sources. Sources:County Biological Survey,MnDNR. TKDA Grant 3fi i Stillwater j kION pnn95j i` � Oak 41 c Park �.•� � � .__. � 4N Height 1 • II , I i i , t (4. Baytown I ,1 Twp, ,L L 11 r'1 • ---------- Oakdale - a `� , _ • West Lakeland Twp. � � t k 01, , • i ~� Woodbury Afton K:\gis\LAKEELMO\PROJECTS\2009 SWMP\Maps\Figure 14-1-andCovel-Map.mxd FIGURE 14: Legend LAND COVER N Urban with Vegetative Cover Urban with Little Vegetative Cover Surface Water Management Plan WL7r E Planted or Cultivated Vegetation 2030 Comprehensive Plan S Upland Forest City of Lake Elmo, Minnesota _� Wetland Forest Woodland CITY of LAKE Map date: February 2009 0 0.25 0.5 1 Upland Shrubland Prepared by: - h EL�'9,0 Miles Wetland Shrubland TKDA Dry Grassland LIMITATION OF LIABILITY This document is not a legally recorded map or survey and is not Wetland Prairie ENGINEERS•ARCHITECTS•PLANNERS intended to be used as one. This map Is a compilation of records and information from various state,county,and city offices,and other sources. Water Sources:MnDNR, TKDA Grant Stillwater (Pine KlawitterPond Oak Park h Heights au Cleat: `tq` �. :r~'��_— "r'`�-•r_`�. y` CIO •` sr .r. wa' � ti � - y •+ ,N7, !• � •_1� Dirk'�Fond Goetschel + 1.V�•y ��r ;,,�ws� �'`���Via• ' `• "'-' %: l�.f•:�-�: ^\ ',,.: - :ll &,,4 72,t�i�`�,1� � .� �µ fi;"Y n j�T ��Q..�.��r+'+Nty��`,�,,.p,`�:���"'•^�'�''•`eY�.��'�_ • • �n s.`'`�.�:=., :'�.•�•.:�..•tii+''•y'y ."``•lye+4:••� :_*�",;.:iy" , r•,.:_- _ _ __, - -, Baytown ter.. .. .. .. .a Y"`� • .'. ._^ ....:.; =L�-A:�G rA• Twp. � i fel' "�- .... ��^ :...' iL'� �J rry ~• �Mi •- 4 Jai Pond i..:, -y tMti„" .. 1� •�_ -,ti y �7a.•.� Friedrich Pondf -------------- Oakdale .! n•.`Y�~� ._ :4 W :' •'Legion Pond :•1�4�_;Fv1l�i1~ � ', yy��Lr�;:�:,f`�.`�t."_�.�t..4;•�+���.�•[r,,��•w`�,,-•2i'.it�«�..�.w +�, trt �i6,A►W ti.r4 "'! [:•. aY�Yri+tf.Yi•...� ��� '-a �. Il.E9� �' -`',� ,�•� ;r i.". f^ +"` +'', .+� _+±': �,u����+�^ �'s.r .�. :;+: .fir .'. �+.1 '+ a. '..�1.w r•.:, +`•'`�T11a.T•.'•'\�Y '+►' M T Y± trT�: > �T•��-.••;M ? ; + y •y=��r•a•��,r_1� i { � _i-� _��. 1� rN�T _`ate � =.,r_ . 'Y��`J• « � Eden . h ��� r�i by 4� Y•,L� w i •�. Park 'Downs 1�.: r:': � �;,',`y Y = "�..LL _..•." Pond Iwfrilse�y.�lnir�L'L•"`"_• r � . 4 .,ti�• ti[�0��`] r --K f�;. .`r,r,.�``'J w ram...•_�`�, A .. '� � �`y 1'.�`+•r.. _��� . .. :yam':J_.�.r _ ' �•"'�-:w���w- '�� �' West Lakeland '� `:` +.�" .:A-. ryas ^ •. :.h��. `lam ti- ' v Twp. r V•:7>'T' a '11@1�' i7y�.••';�.'�w� �TM' n y�.��� .T'r,,.••w,..�•_,_rr,, :;••r�F`•.. I � 1'1. „`t Y,h Yy`. �•y�•�Mi y •r ,4 M/d n y / �f i .. • Y ` y t�•' t a` � a�.^-•�`• �r•}'•.ni+"•';• r ` it + y v:'� 1 ;.. ~ "Y+.ti• � y a W ..� ! R , Armstrong - _ ,r-y... oSe - - XTarrler--------------------------------- �� f• f: --------------- Woodbury Afton KAgis1LAKEELM0IPR0JECTS12009 SWMP1MapslFigure 15-GreenwayCorridorsMap.mxd FIGURE 15: Legend GREENWAY CORRIDORS N City Boundary Surface Water Management Plan W E City Greenway/Beltway 211 2030 Comprehensive Plan 0°�' n Lake Elmo Park Reserve Boundary SQ®®06'ri City of Lake Elmo, Minnesota SVVWD Greenway Corridor cm of a Metropolitan Conservation Corridors Map date: February 2009 0 0.25 0.5 1 LAKE LAKE ELMOPrepared by: Lakes Miles TKDALIMITATION OF LIABILITY This document Is not a legally recorded map or survey and is not ENGINEERS•ARCHITECTS-PLANNERS intended to be used as one. This map is a compilation of records and information from various slate,county,and city offices,and other sources. Sources:MnDNR,Metropolitan Council,Lake Elmo, TKDA I ILake Elmo Comprehensive Plan ChapterX—Local Surface Wafer Management Plan 9. Storm Water System IThe existing mapped stormwater conveyance system and stormwater treatment system in Lake Elmo is identified on Figures 16A through 16D. IThe backbone of the City's drainage system is the major flood-relief project that links drainage from the Tri-Lakes Area through the City and ultimately discharges at the City's eastern boundary at Horseshoe Lake. This project was completed by the VBWD (Project 1007), The VBWD is the owner and operator the Project 1007 outlet system. Lake Elmo is also comprised of a series of lakes,ponds,infiltration basins, and wetlands that collect storm water runoff within subwatersheds throughout the City. Developments are a combination of urban streets I (curb and gutter with catch basins and storm sewer pipe) and-rural streets (ditches). Various sizes and material of storm water pipe,manholes, catch basins,flared end sections, culverts, outlet control structures, skimmers,and ditches manage the conveyance of storm water. These storm wafter facilities were required to be mapped for all sizes 24" Iand larger per the City's MS4 Permit requirement. The City began mapping efforts in 2006,utilizing GPS survey and existing record drawings to map the stonn water system. Mapping data is updated annually as the system expands or and new information is integrated. I i ' I . i , I ; I : i L Page 31 14287.000 I Pine Grant KI HV r -- �' _�� �� `N, �•. \\r' 15„ _ nc. _III- `'� 'r 'X �9 ............ i " DeMontreville'; F - - 111 2 a'�� , rd� IL Olson � •\ �'�-_�, may'?'-- I 1 ...... Jane 1 - r 15 is P di -- B he Ns on 1, Crp�nbi — r ' 411 00 FIB , rr i s'r8'•.I— iN IY�•fi ' \ - 12 r•, s �• 1" i. _ ..-..._._....._.. - - L. 1� AL =r ---- i ` 8 ) N Ar!. I - eu Pon r Y drich 48" KAgis\LAKEELMO\PROJECTS\2009 SWMP\Maps\Figure 16A-NW-StormwaterSysternft.mxd FIGURE 16A: STORM WATER Legend SYSTEM (NW AREA) N , ' City Boundary Public Waters Surface Water Management Plan W E . CB MH CB 2030 Comprehensive Plan S o 0 CB City of Lake Elmo, Minnesota A FE CITY OF ® Outlet Control Structure LAKE Map date: February 2009 0 0.125 0.25 0.5 ® Skimmer ELMO Prepared by: storm Pipes Miles TKDA �---_----� Box Culvert LIMITATION OF LIABILITY C VBWD Project 1007 Points This document is not a legally recorded map or survey and is not ENGINEERS•ARCHITECTS•PLANNERS intended to be used as one. This map is a compilation •f records VBWD Project 1007 Lines and information from various state,county,and city offices,and other sources. Sources:City of Lake Elmo, TKDA int 36 Stillwater ' 7 1 WZ -n ................ C < 0 a Par Heigt H ................. J.5 ............ L 7 ................... IL A Oak GA/sv Clear_. ,ear. . .............. ..... _ _ _ ��-----(( 0 A cl - --------- ................................... Ai tschel ............... C 77 .......... A& V .......... I'm I T T Baytown 41, Twp. "U" . ............. A < Alk, Sunfish ......................... In .......................... ..... —0 4, 4.5'1'- 18- 151- 1-12Q. ------------- K:\gis\LAKEELMO\PROJECTS\2009 SVVMP\Maps\Figure 16B-NE-StormwaterSystemMap.mxd FIGURE 16B: STORM WATER Legend SYSTEM (NE AREA) N City Boundary Public Waters Surface Water Management Plan W E a CB 0 CB MH 2030 Comprehensive Plan S A FES City of Lake Elmo, Minnesota ® MH CITY OF 0 Outlet Control Structure L A K Map date.- February 2009 0 0.125 0.25 0.5 0 Skimmer, E ELM Prepared by: - Storm Pipes Miles Box Culvert TKDAL MITATION OF JABILI VBWD Project 1007 Points if Ty This document is not a legally recorded map or survey and is not ENGINEERS-ARCHITECTS-PLANNERS intended to be used as one.This map is a compilation of records VBWD Project 1007 Lines and information from various state,county,and city offices,and other sources. Sources:City of Lake Elmo, TKDAJ T P nd IT- a 17- .... ..... .......... 0 L Wale T .......... P r� ..A I I I A 1.1 L —71 12 1121. 81, 7 -JIL".4 1,5" I-AA Eagle Point Ak' ................ 'AAL- Br on ............... N L------------ F ..........-.I L Armstrong 0. T- .......... --T -1=7 \V//-, \-54" F-� ------------ ------------------------------------ Woodbury K:\gis\LAKEELMO\PROJECTS\2009 SWMP\Maps\Figure 16C-SW-StormwaterSystemMap.mxd FIGURE 16C: STORM WATER Legend SYSTEM (SW AREA) N L1-XJ City Boundary L-5 Public Waters Surface Water Management Plan w E X CB 2030 Comprehensive Plan 0 CB MH S City of Lake Elmo, Minnesota A FES 0 MH C]Tf OF 0 Outlet Control Structure L Map date: February 2009 0 A VE 0.125 0.25 0.5 (9 Skimmer FELF Prepared by: - Storm Pipes W 0 Miles Box Culvert TKDA LIMITATION OF LIAE31LITY a VBWD Project 1007 Points This document is not a legally recorded map or survey and is not ENGINEERS-ARCHITECTS-PLANNERS intended to be used as one. This map is a compilation of records VBWD Project 1007 Lines and information from various state,county,and city offices,and other sources. I Sources:City of Lake Elmo, TKDA Ail e ion Pon " I•�_w Elmo I i �.. denQ�a f P� . �d I � Downs _ \, • sOn � j f .y� _ .._._._.._ 1 1 Well; argaret Lakel TW . ..................................... Bro n and l Horseshoe F—F T C3� - �.� — Rose ' r Good . 01 I i I Krame -- r ✓ter — .... Wnndhury I Affnr K:\gis\LAKEELMO\PROJECTS\2009 SWMP\Maps\Figure 16D-SE-StormwaterSystemMap.mxd FIGURE 16D: STORM WATER Legend SYSTEM (SE AREA) N City Boundary Public Waters Surface Water Management Plan W 0 CB MH E a CB 2030 Comprehensive Plan S S FE® City of Lake Elmo, Minnesota FE MH CITY of ® Outlet Control Structure Map date: February 2009 0 0.125 0.25 0.5 ® Skimmer E Fo0 Prepared by Storm Pipes Miles Box Culvert € TKDA LIMITATION OF LIABILITY 0 VBWD Project 1007 Points This document is not a legally recorded map or survey and is not E14GINEERS'ARCHITECTS•PLANNERS intended to be used as one. This map is a compilation of records VBWD Project 1007 Lines and information from various slate,county,and city offices,and other sources. Sources:City of Lake Elmo, TKDA 1 Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan 10. Planning and Develo ment a. Comprehensive Plan and Land Use The City of Lake Elmo is currently updating its Comprehensive Plan.This Surface Water Management Plan will be adopted as an element of the Comprehensive Plan. The new Comprehensive Plan will be adopted in 2009. The City expects that the land use plan through 2030 will be similar to the current land use plan.New growth is expected to be focused in the Old Village Area.The largest land use within the City is Rural Agricultural Density with over 40%of the land area in this designation. The City's Land Use Plan directs higher density developments within the Old Village area of the community.The City is completing an Alternative Urban Area-wide Review (AUAR)in order to plan for development within the Old Village. Significant open space areas are included within the Lake Elmo Park Reserve and parks,open space,and trail system within the City. Figures 17 and 18 show the City's existing and proposed laird use maps. 1 1 . 1 I I Page 36 14287.000 I Grant Stillwater Pine ,Springs;14 Oak Park Height ll o Baytown j i o Twp. l I Oakdale s� ui West Lakeland Twp. l TF M HT if'\,i i i /U --------------- Woodbury ' Afton K:\gis\LAKEELM0\PR0JECTS\2009 SWMP\Maps\Figure 17-ExistingLandUseMap.mxd FIGURE 17: Legend EXISTING LAND USE N C - Commercial - Surface Water Management Plan W E - BP - Business Park g LB - Limited Business 2030 Comprehensive Plan S PF - Public/Semi-Public Facilities City of Lake Elmo, Minnesota RAD - Rural Agricultural Density RED - Residential Estates Density i c:ri or r ,nn Map date: February 2009 0 0.25 0.5 1 URD - Urban Residential Density Prepared by: Miles NC - Neighborhood Conservation ' ROW- Right-of-Way ` TKDA LIMITATION OF LIABILITY ----- �. This document is not a legally recorded map or survey and is not WAT-Water ENGINEERS•ARCHITECTS•PLANNERS intended to be used as one. This map Is a compilation of records and information from various state,county,and city offices,and Old Village other sources. ge Sources:City of Lake Elmo, TKDA From Future Land Use Map Dated July 12,2005 Grant 36 Stillwater j .Pine ,�% � Springs !°� -- Oak Park ' Height EM a ° a 0 J ql ®0 Baytown Twp. ,a Lj EBE I I- ! A� I Oakdale ®� D West Lakeland U Twp. --------------- I, , '6 t II I fl Woodbury Afton KAgis1LAKEELM0IPR0JECTS0009 SWMP1MapslFigure 18-FutureLandUseMap.mxd FIGURE 18: Legend N ® C-Commercial FUTURE LAND USE - BP-Business Park-40 Employees/Acre W C __ PF-Public/Semi-Public Facilities Water Surface Management Plan C RAD-ResAg Density 0.45 DU/Acre 2030 Comprehensive Plan _______ RAD-Res Ag Density-2 DU/Acre City of Lake Elmo, Minnesota S ! URD-Urban Res Density-Cimarron SRD-Sewered Res Density-3.5 DU/Acre CITY OF � -� RED-Res Estates Density LAKE Map date: February 2009 0 0.25 0.5 1 NC-Neighborhood Conservation j Prepared by ` LB-Limited Business-Future sewer-40 Empl/Acre EL�i ® lj Miles TKDA LB-Limited Business-Non-sewer LIMITATION OF LIABILITY ROW-Right-of-Way This document is not a legally recorded map or survey and is not EN WAT-Water ENGINEERS•ARCHITECTS-PLANNERS intended to be used as one. This map is a compilation of records and information from various state,county,and city offices,and other sources. VR-Village Res Sources:City of Lake Elmo, TKDA From Future Land Use Map Dated July 12,2005 f Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan 4 C. Regulatory Setting 1. City of Lake Elmo The Zoning Administrator manages comprehensive planning, zoning controls and City ordinances, in conjunction with the Planning Commission and City Council.The zoning code contains the following regulations related to surface wafter management and protection: Chapter 53 Stormwater Management Utility Chapter 91 Forests and Trees Chapter 152 Flood Plain Management ! Chapter 153 Subdivision Regulations f Chapter 154 Zoning Code The regulations will be revised as needed to incorporate the goals and policies identified in this Local Surface Water Management Plan. 2. Washington County Washington County is the primary local planning entity for ground water planning.As directed by Minnesota Statute 103B.255,Washington County prepared the 2003—2013 Washington County Groundwater Plan, which provides a county-wide framework for the protection and conservation of groundwater resources.The County also prepares an annual groundwater work plan. State Statute §103B.255 -Ground water ( plans, Subdivision 1,requires that Watershed and Local Water t Management Plans comply with the provisions of the Cou nty's Groundwater Plan. The County also has specific programs and policies relating to drainage issues on its highway systems and county ditch systems.The County has adopted a shoreland zoning ordinance and floodplain ordinance for areas outside incorporated cities. 3. Washington County DeuartmAnt of Parks and Recreation The Washington County Parks consists of six regional parks(including Lake Elmo Regional Park Reserve),one county park,one regional trail, one historic site, and an additional regional park in the'acquisition phase'. These locations total 4,312 acres and contain facilities for a variety of outdoor-oriented activities including camping, swimming,picnicking, fishing,and others. There are also 15 miles of paved trails and 35 miles of turf trails (30 of which are also groomed for cross-country skiing)to IPage 39 14287000 I Lake Elmo Cotnprehensiva Plan Chapter X—Local Sutface Water Management Plan accommodate a variety of trail users.An additional 32 miles of County- operated paved trails can be found outside the parks. In addition to County and Regional Parks, Washington County also has two state parks, William O'Brien and Afton State ParIc and a portion of the Gateway State Trail. The County is also bordered on the east by the L_ St. Croix National Scenic Riverway and on the south by the Mississippi National River and Recreation Area. The'Parks Ordinance'was reviewed, updated,and approved by the Washington County Board of Commissioners on May 23, 2006.It became effective on June 7,2006. 4. Washin on Conservation District F The Washington Conservation District is a Soil and Water Conservation District(SWCD) established under Chapter 103C of Minnesota Statutes. The purpose of these Districts is to promote programs and policies which ! , can conserve the soil and water resources within their territorial limits. �- Historically, SWCDs focused on identification,implementation,and financial support of practices that effectively reduce or prevent erosion, sedimentation, siltation, and agriculturally-related pollution.As formerly �- rural counties in the Metropolitan Area have become more urban, SWCDs have expanded their roles to address the impacts of urban development on water and natural resources. The Washington Conservation District and other SWCD's frequently act F. as local sponsors or provide cost-share resources for water management L . projects that include a variety of BMP's. The Districts also are actively involved in educational programs which promote water,natural resource, f" and soil conservation practices. The SWCDs receive a great deal of L: technical assistance from the United States Natural Resource Conservation Service. In 1998,Minnesota Legislature established the Metro Greenways Program. The goal of this program is to establish a regional network of connected open space and natural areas for the purpose of protecting diverse plant and animal habitat while providing aesthetic and economic benefits to communities.The Washington Conservation District is isi the process of preparing a Resource Inventory for the City and other p' P p g r3' Y I . communities in Washington County as part of the Metro Greenways Project. This inventory may be used as a tool for greenways planning within the City. Y 5. Watershed Management Organizations The State of Minnesota adopted the Minnesota Watershed District Act in 1955. This Act, now codified in Minnesota Statues §103D (formerly Page 40 14287.000 I, 1 Lake Elmo Comprehensive Plan Chapter-X—Local Surface Water Management Plan Chapter 112),provides for establishment of watershed districts to regulate water resource planning,flood control,and other conservation issues. In 1982,the State approved the Metropolitan Surface Water Act, Minnesota Statutes §103B.This act requires all metropolitan area local l . governments to address surface water management through participation in a Water Management Organization.A WMO can be organized as a Watershed District, a joint powers agreement(JPA)among municipalities, or as a function of county government. The City of Lake Elmo is divided into multiple drainage basins that flow to three separately managed watersheds.The Brown's Creek Watershed, Valley Branch Watershed and South Washington Watershed are managed by Watershed Districts.Figure 19 shows the three watershed management organizations with jurisdiction in the City. a. Brown's Creek Watershed District(BCWD) Brown's Creek Watershed District was formed in 1997 by Washington County petition, under the authority of Minnesota Statutes §103D.BCWD covers approximately 29.4 square miles and is composed of seven communities: Grant,Hugo,LaIce Elmo,May l Township, Oak Park Heights, Stillwater,and Stillwater Township. I : Lake Elmo is the local governmental unit(LGU)for the Wetland Conservation Act(WCA)within the areas of the City Iocated in the BCWD.The City works with the Washington Conservation District to provide technical assistance with these issues if the City requires assistance. b. Vallgy Branch Watershed District VBWD Valley Branch Watershed District was formed in 1968,under the f authority of Minnesota Statutes §103D. VBWD covers approximately 65 square miles and is composed of 14 communities: Afton, Baytown Township, Grant,Lake Elmo,Malntonnedi, Maplewood,North St.Paul, Oak Park Heights,Oakdale,Pine Springs, St.Maly's Point,West Lakeland Township,White Bear Lake,and Woodbury. VBWD has been authorized by the Minnesota State Legislature to g act as the LGU responsible for administering the Wetland i Conservation Act. The filling,excavation, and draining of wetlands are regulated by the Wetland Conservation Act of 1991,which is administered by a local government unit.(LGU). In addition to the Wetland Conservation Act,the VBWD has additional stormwater and wetland regulations over activities occurring within its 17 boundaries. The VBWD is the LGU responsible for administering Page 41 14287.000 Lake Elmo Comprehensive Plat? Chapter)(—Local Surface Water Management Plan L. the Wetland Conservation Act in the areas of all cities and townships within the legal boundaries of the VBWD including areas in Lake Elmo. C. South Washington Watershed District SWWD ° ' L SWWD started as the Cottage Grove Ravine WMO in 1984,was established as a Watershed District in 1993, and changed its name to South Washington Watershed District in 1995.It expanded in 2003 by including the East Mississippi WMO within its boundaries and was formed under the authority of Minnesota Statutes 103D. SWWD covers approximately 71.3 square miles, is located entirely in Washington County, and contains portions of eight cities and townships:Afton,Cottage Grove, Grey Cloud Island Township, r Lake Ehno,Newport, Oakdale, St.Paul Park and Woodbury. Lake Elmo is the LGU for the Wetland Conservation Act(WCA) r. within the areas of the City located in the SWWD. The City works with the Washington Conservation District to provide technical (- assistance with these issues if the City requires assistance. SWWD's plan includes goals and associated policies that form the L framework for water resource management decisions.The following are the SWWDs Guiding Principles: r • Permitting: The SWWD believes that the permitting process is best performed by cities.The District, through the promulgation of rules,will provide guidance to cities in L managing growth. L • Regional Water Planning:The SWWD believes in proactively coordinating with its constituents for long-teen surface water planning and implementation of regional water capital improvement projects. Studies and associated surface water modeling activities are best initiated at the watershed level. • Land Management: The SWWD recognizes that the primary control and'determination of appropriate land uses is the L responsibility of the municipalities,except on parcels acquired and owned by the District to benefit water and related resources. • Balanced Approach: The SWWD believes in taking a balanced L approach to managing resources,resolving issues,and L implementing solutions.The District seeks the best outcome in the context of the entire watershed resources and constituents. L Page 42 14287.000 L Pine Grant Springs j Stillwater[ _ 36 Brown's Oak Park Creek Height Baytown Twp. -------------------- I Oakdale Valley Branch West Lakeland Twp. Ramsey -i ashington South Washington Woodbury ! Afton KAgis1LAKEELM0\PR0JECTS\2009 SWMP\Maps\Figure 19-WatershedAuthoritiesMap.mxd FIGURE 19: Legend WATERSHED AUTHORITY N City Boundary Surface Water Management Plan W E 0 Brown's Creek Ramsey Washington 2030 Comprehensive Plan S South Washington City of Lake Elmo, Minnesota Valley Branch cArr of LAKE Map date: January 2009 0 0.25 0.5 1 Prepared by: ��a�y1h E L M 0 Miles ! j TKDA LIMITATION OF LIABILITY This document is not a legally recorded map or survey and is not ENGINEERS•ARCHITECTS•PLANNERS intended to be used as one. This map is a compilation of records i and information from various state,county,and city offices,and other sources. Sources:VBWD,Metropolitan Council, TKDA i Lake Elmo Comprehensive Plan ChepterX—Local Surface Water Management Plan 6. Metropolitan Council . The Metropolitan Council,created in 1963, is the regional governmental body responsible for planning within the seven-county Minneapolis-St. Paul metropolitan area. The Metropolitan Area includes Anoka, Carver, Dakota,Hennepin,Ramsey, Scott, and Washington Counties. The Council plans for major regional systems,including the following: Transportation and Mass Transit ■ Wastewater and Public Water Supply Systems ■ Housing,Re-development, and Urban Growth p , i Regional Parks and Open Space iE Water Resource Management 1 The Council has review authority for City and County Comprehensive Plans within the 7-County Area,to assure that they are consistent with the regional system plans.The Council provides extensive data analysis and information to local communities,and completes forecasts of regional and local population growth that are used in the development of local plans. l The Council's activities specific to water resources management include: Region-wide Surface and Ground water Planning and Non-point Source Pollution Abatement ■ Industrial Wastewater Management ■ Sewage Collection and Treatment ! The Council provides guidance for developing local water resource plans in its"Water Resource Management Policy Plan"adopted December 19, 1996. The Plan identifies broad region-wide objectives for water ( , management, and its Appendices detail the requirements for Local Surface Water Management Plans. 7. State Board of Water and Soil Resources (BWSR i The BWSR was created by State Legislature in 1986. Three functioning state boards were eliminated by this legislation and their duties were transferred to BWSR on October 1, 1987.BWSR's duties include oversight programs and funding of State Soil and Water Conservation Districts,formation and guidance of watershed districts,and the direction and assistance to counties in developing their Comprehensive Water Page 44 14287.000 I l �d Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan Plans.The BWSR is the State agency responsible for implementation of the Wetland Conservation Act(WCA). The BWSR reviews and approves water management plans and project activity of watershed districts and soil and water conservation districts. 8. Minnesota Pollution Control AqeneL,LMPCA The MPCA has created by State Legislature in 1967.The MPCA has both f regulatory and enforcement authority relative to potential actions which _ could affect the quality of the ground waters and surface waters of the State. Since future City projects will likely involve water quality r considerations,the MPCA may become an active participant in these projects.The MPCA is also involved with other governmental units, such as municipalities, in the construction and operation of wastewater treatment plants and the control of non-point source pollution. The MPCA is the key state agency that regulates the management of wastewater, storimwater,and solid waste in the City of Lake Elmo. f' i The MPCA is required to publish a list of impaired waters in the state not ` meeting federal water quality standards.For each waterbody on the list, the MPCA is required to conduct a study to determine the allowable Total L Maximum Daily Load(TMDL)for each pollutant that exceeds the - standard.Local governments will be required to incorporate completed TMDL Studies into their surface water management plans. Impaired waters in Lake Elmo are summarized.in Table 6-1 and shown on Figure 20. Another important function of the MPCA is implementing the National Pollutant Discharge Elimination System(NPDES)program. This program regulates not only traditional wastewater discharges but also construction activities and storm water. ' The MPCA NPDES Phase H general permit establishes conditions for discharging storm water,and specific other related discharges,to waters , of the State.This permit is required for discharges that are from Small Municipal Separate Storm Sewer Systems. The Rule identifies a number of implementation options for regulated small municipal separate storm sewer system (MS4) operators.Lake Elmo completed their MS4 permit in June 2006. A copy of this permit is in the Appendix. r The MPCA has also published the Minnesota Storimpater Manual. The manual serves as a unified stonmwater guidance document for the entire state. The MPCA monitors groundwater,quality and protects it from contamination.MPCA also identifies and regulates the Special Well Construction Areas(SWCA)within Lake Elmo. Page 45 14287.000 L _ . i Lake.Elmo Comprehensive Plan ChapferX—Local Surface WaferManagemenf Plan 9. Minnesota Department of Nataaral Resources(MnD1�T13) The MnDNR was originally created in 1931 as the Department of Conservation.The MnDNR has both regulatory and enforcement authority over the natural resources of the State.The principal divisions of MnDNR include the Division of Waters,the Division of Forestry, and the Division of Fish and Wildlife (which includes the sections of Wildlife,Fisheries,and Ecological Services).The Division of Fish and Wildlife is responsible for the management of Minnesota's 1.2 million acres of wildlife management areas(WMA). I The MnDNR has permit authority for any change in cross-section or work below the Ordinary High Water(OHW) level of regulated water bodies. This often includes protected waters and wetlands. The MnDNR is also actively involved in helping local units of government administer floodplain management ordinances and standards. 10. Minnesota Department of Health (MDM The MDH manages programs to protect the public health, including implementation of the Safe Drinking Water Act(SDWA).It has permit authority and regulatory authority for monitoring water supply facilities. These facilities include water wells, surface water intakes,water treatment, and water distribution for public use.The MDH also is responsible for the development and implementation of the Wellhead Protection Program. 11. Minnesota Environmental Qanality Board (EQB) The EQB is comprised of five citizen members and the heads of ten state agencies that play an important role in Minnesota's environment and development. The EQB develops policy,creates long-range plans and reviews proposed projects that may significantly influence Minnesota's environment. 12. Minnesota Department of Transportation(MnDOT) Within the City,MnDOT administers several state highway systems. Since highway systems cross drainage patterns of natural and artificial waterways,there is opportunity for frequent interaction between Cities and MnDOT. City projects requiring structures through MnDOT regulated highways require coordination and approval by MnDOT. Anticipated activities of MnDOT are periodically published in their State Transportation Improvement Plan(STIP). Page 46 14287000 Lake Elmo Comprehensive Plan ChapterX—Local Surface Water Management Plan 13. U.S..S Environmental Protection Agency (USEPA) The EPA develops and enforces regulations that implement environmental laws enacted by congress. Responsibilities of the EPA within Minnesota have largely been delegated to the MPCA.The NPDES Program and Impaired Waters List are both the result of the Clean Water Act(CWA), administered by the EPA. 14. U.S.Army Corns of Engineers (USACE) The USACE can have permit and regulatory authority over projects in the City under Section 404 of the Clean Water Act.Wetlands are considered waters of the United States and are regulated by the U.S.Army Corps of Engineers(USACE)under the Clean Water Act(CWA). Section 404 f' authorizes the USACE to issue permits.for the placement of fill into all wetlands of the U.S. L 15. Federal Eme enc Management Agency FEIVIA FEMA manages federal disaster mitigation and relief programs,including the National Flood Insurance Program(NFIP).This program includes floodplain management and flood hazard mapping.FEMA published the 1. Flood Insurance Rate Map(FIRM)in Lake Elmo in 1980. 16. Natural Resource Conservation Service The Natural Resources Conservation Service(formally called the Soil l ' Conservation Service (SCS), is a division of the U.S.Department of Agriculture.The MRCS provides technical advice and engineering design services to local conservation districts across the nation.The Soil Survey of Washington and Ramsey Counties was published by the MRCS in ; 1980.The NRCS also developed hydrologic calculation methods that are widely used in water resources design. 17. U.S. Geological Survey (USGS The USGS provides mapping and scientific study of the nation's landscape and natural resources.USGS snaps provide the basis for many local resource management plan efforts. 18. U.S.Fish and Wildlife Service (USFffS) The mission of the USFWS is to conserve,protect,and enhance the nation's fish,wildlife,plants and habitat. The USFWS developed the L National Wetlands Inventory (NWI) in 1974 to support federal, state,and local wetland management work. 17 L Page 47 14287.000 Lake Elmo Comprehensive Plan ChapterX--Local Surface Water Management Plan D. Related Studies, Plans, 2.iid Deports I. Comprehensive Plan j The City's 2020 Comprehensive Plan is currently being updated for 2030. ! The plan includes goals and policies for land use, infrastructure and community systems, and for protection of water and natural resources. The Comprehensive Plan will serve as the basis for updating the City's land use map, zoning map,and City Code. This Local Surface Water Management Plan will be adopted as an J element of the City's 2030 Comprehensive Plan. 2. Brown's Creep Watershed District Watershed Management Platt The Brown's Creels Water Management Organization was established in the early 1980s under the State of Minnesota statutes as a joint powers agency.In 1990,it prepared and had approved the First Generation Watershed Management Plan for the Brown's Creek Watershed Management Organization.Brown's Creels Watershed District was established in October of 1997 and the second generation plan was developed at that time. The third generation plan was developed in 2006 and will guide BCWD activities through 2016. The Watershed District supports fundamental water resource protection and research, capital projects,rules and permitting program,and Watershed Plan development and management as expected under state statutes 103B and 103D. IThis Watershed Management Plan is intended to be a ten-year planning document to guide District activities until superseded by adoption and ` approval of a subsequent plan.The plan identifies ten general issue areas and a number of policies,goals, and implementation items to address the specific concerns within each issue. 3. Vailey Branch Watershed District Watershed Management Plan The VBWD Watershed Management Plan(VBWD Plan) is the fourth VBWD Plan approved by the Minnesota Board of Water and Soil Resources(BWSR)or its predecessor.The first plan was developed in 1970,with revisions in 1987, and again in 1995.This plan is developed in icompliance with the Metropolitan Surface Water Management Act (Minnesota Statutes 103B). The Plan will govern management of resources in the District through 2015, or until superseded by adoption and approval of a subsequent Plan. The VBWD Watershed Management Plan sets the vision, guidelines, and Proposed tasks for managing surface water within the boundaries of the VBWD. It also provides an assessment of water and natural resources, identifies key factors and major issues facing the watershed,and includes Page 48 14287,000 l Lake Elmo Comprehensive Plan ChapterX—Local Surface Water Management Plan goals and policies for the protection and enhancement of the water and related land resources within the district. 4. South Washin ton Watershed District Watershed Management Plan The South Washington Watershed District's Watershed Management . Plan(WMP)provides guidance for the SWWD to manage the water and natural resources of the watershed. The SWWD plan inventories resources,assesses resource quality, and establishes regulatory controls or physical improvements to maintain environmental quality of the watershed. r The South Washington Watershed District updated its WMP in 2007. The District's original watershed plan was approved in 1997 and amended in f 2002 to incorporate major outcomes of a hydrologic study.According to state law,WMPs must be updated every 10 years.The WMP update was formally adopted in November 2007. f The SWWD's updated plan includes policies and related information critical to managing urban development and growth. The plan identifies priority issues for the District to address.A 10-year work plan has been developed that identifies projects and programs which address these priority issues and other important areas. The updated plan also focuses on characterizing the quality and management of key lake resources in the watershed. Ir l- jq- 4 f t Page 49 14287,000 I Lake Elino Comprehensive Plan Chapter)(—Local Surface Water MaliagementPlan E. Coals .and Policies The following are the adopted Surface Water Management goals algid policies for the City of Lake Elio: 1. The City of Lake Elmo is committed to a goal of no adverse impacts to ground and surface water resources in the area. Policies: M The City will work cooperatively with local water management organizations, state agencies, and landowners to protect local wetlands, lakes, streams,and groundwater to preserve the values of these resources for future generations. ■ The City concurs with and adopts the Valley Branch, South Washington and Brown's Creek Watershed Districts'Watershed Management Plans,rules and standards by reference through this LSWMP. The Watershed Districts will continue to enforce surface water regulations and permitting within the City within the boundaries of their districts.The City will coordinate its review of development proposals with the Watershed Organizations,by ( providing review comments to the districts. b The City will manage land use to support protection of surface and ground waters through the following elements of its Zoning and Subdivision Ordinance: Chapter 53 Storinwater Management Utility Chapter 91 Forests and Trees Chapter 152 Flood Plain Management ` Chapter 153 Subdivision Regulations Chapter 154 Zoning Code I ■ The City will review its existing stonnwater management and f erosion and sediment control regulations,and will update its 1 ordinances to be consistent with the Watershed District plans and standards,and NPDES Construction Stormwater Permit requirements for storm water management and for erosion and sediment control. ■• The City will cooperate with the County and the Watershed Organizations in managing land use to protect ground water resources.Additional goals and policies for groundwater protection Page 50 14287.000 t= I Lake Elino Comprehensive Plan Chapter X—Local Surface Water Management Plan are included in the Water Supply element of the City's Comprehensive Plan. ■ The City encourages the use of best management practices for agricultural land uses to minimize erosion and to protect the quality of surface and groundwater resources. L ■ The City supports and will encourage developers and landowners to use stormwater practices that promote infiltration/filtration and decrease impervious areas through site design and use of Low Impact Development(LID)techniques. r' 2. The City will work with local Watershed Districts to address the specific water management issues identified in the District's plans. E Policies L ■ The City will implement the mitigation plan included in the Lake Elmo Village AUAR to manage water quantity and quality concerns L in the Down's Lake Watershed. The Mitigation Plan requirements are detailed in Sections F and G of this Plan and in the AUAR document. L ■ The City will work with Valley Branch Watershed District to address flooding issues near Friedrichs Pond,Legion Pond,and the 4 Kelvin Avenue area north of Highway S. is • The City will adopt and enforce the VBWD's standard that i. minimum floor elevations of buildings be 2' or more above the 100 year flood plain. r._ ■ The City will work with the SWWD, land owners and developers to implement its concept plans to provide flood storage in Northern Subwatershed,to protect Wilmes Lake. 3. Protect the quality of local lakes by supporting the Watershed Districts' goals and plans for managing lakes in the City. �! h .Policies: {{f' ■ The City will update and implement its land use plan,zoning and t subdivision ordinances to protect shoreland areas and lake water quality,and work with the Watershed Districts to achieve the lake management goals identified in the Watershed's Water Management , Plans. Page 51 14287.000 1 Lake Elmo Coinpi-ehensive Plan ChapterX—Local Surface Wafer-Management Plan ■ The City will participate in the Watershed Districts' Total Maximum Daily Load(TMDL) studies and implementation plans to address impaired water bodies within the City and areas downstream. I 4. Protect and enhance the quality of wetland resources i .Policies. IR The City will cooperate with the Valley Branch Watershed District as they serve as the LGU for the WCA within its watershed area. ■ The City will serve as the LGU for the WCA within the BCWD and SWWD areas of the City. The City will utilize the technical assistance provided by the Washington Conservation District in this role. ■ The City will support and help to implement Watershed District requirements for wetland management,including buffer requirements and pretreatment of stoi7nwater prior to discharge into { all wetlands. ■ Wetlands that have not been inventoried by the Watershed Districts will be required to complete a functions and values assessment as a part of the development application. Watershed rules regarding I wetland management will be applied based on.the results of the assessment and the wetland classification. The City supports inspection of on-site individual sewage treatment systems by an MPCA certified inspector at the time of property sale i or transfer and requirements that these systems meet state standards. j 5. Protect and enhance the quality of natural resources. .Policies. ® The City will work with state agencies,Washington County, local watershed districts and residents and landowners to protect and enhance natural communities and natural resources in Lake Elmo. ' N The City will encourage developers and landowners to retain native vegetation and undisturbed areas to protect habitat and manage stormwater. ■ The City will encourage subdivision design that preserves natural drainage systems and protects and restores wetlands and wetland buffers. Page 52 14287.000 Lake Elmo Comprehensive Plan ChaptorX--Local Surface Wator-Management Plan The City will work with other organizations and landowners to protect the greenway corridors and habitat connections identified in Lake Elmo. 6. Protect groundwater quality. .Policies. The City will cooperate with the Minnesota Pollution Control Agency,Minnesota Department of Health,and local watershed districts to address ground water quality issues,and enforce its Zoning and Subdivision ordinance to protect groundwater quality and manage groundwater recharge areas. r L_ f- ! . is { Page 53 14287.000 Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan F. Assessment of Problems and Corrective Actions 1. Valley Branch Watershed District Area The VBWD Watershed Management Plan has identified the following problems in the area of Lake Elmo that is within the District. The City and District have discussed these problems,and the City is proposing the actions described here to address the problems: ■ Potential flooding in the Lake Elmo Village Area and the potential water quality and quantity impacts of stormwater runoff from proposed future development,particularly on Down's Lake. o Assessment of Problem:Downs Lake is relatively small,with a large tributary area. The lake has a history of wide fluctuations in water levels,from potential for flooding in some years, very low water levels during drought years. Two homes are within the 100-year floodplain of Down's Lake and connecting waterbodies. f • The Watershed District and the City have studied conditions on the lake and in its watershed several times. A proposal by VBWD for a more detailed study and flood-relief project were l opposed by Washington County,the DNR,Washington I SWCD,MPCA, the City and some residents. o Most recently,the Lake Elmo Old Village Area AUAR analyzed the proposed development scenarios for this area, which drains to Down's Lake. The AUAR analyzed the potential impacts to the lake and other water bodies,and recommended strategies to avoid,minimize or mitigate for impacts. ♦ Proposed Corrective Actions: The AUAR Mitigation Plan commits the Cityto the following actions to manse 1 g g the quantity and quality of runoff from future development in the i AUAR area: ► Construct ponds 519 and 520 as proposed in the AUAR analysis to alleviate existing downtown flooding issues and address rate control,volume management and water quality treatment goals for the AUAR area. ! ► Complete the"Discharge to Waters with Restricted Discharges Assessment"required by the City's MS4 permit and modify the SWPPP to incorporate changes as needed to protect the St. Croix River. Page 54 14287.000 Lake Elmo Comprehensive Plan Chap ter X—Local Surface Water Management Plan ® WorIc with developers to provide runoff volume facilities adequate to maintain existing runoff volume for the 100- year event. r Encourage the utilization of Low-Impact Design and volume management techniques to minimize the stormwater impacts by emphasizing water infiltration and promoting the use of natural drainage systems. j L . Complete the MPCA requirements for ORVW by the end of 2009. 1 m Complete the ongoing maintenance of proposed and existing stormwater facilities ■ Flooding near Friedrich's Pond ` • Assessment of the Problem: The VBWD noted from the late 1970s to the mid 1980s Friedrich's Pond experienced high t water levels resulting from above average precipitation and decreased ground water seepage from Friedrich's Pond,which resulted in basement flooding to the adjacent homes. Since �- that time,the VBWD and the City are not aware of instances of high water levels occurring. Recently,area residents have expressed concerns regarding low water levels in the pond. Land uses are proposed to remain the same in the area in the City's 2030 Comprehensive Plan. 1 • Proposed Corrective Actions: The.VBWD has proposed the following mitigation options to address the high water level in Friedrich's Pond: Installation of a controlled gravity outlet and drainage routes,utilizing a pumped outlet structure,flood proofing the affected homes,flood insurance, and a do nothing approach. The City recognizes all the proposals as feasible solutions to the high water level. However, due to the current trend of low water levels and the Project 1007 flood-relief improvements,the City does not find an immediate need to p Y Y � l; address flooding issues in this area. The City will work directly with the VBWD to continue to monitor the situation. r If potential flooding risks are identified the City will take the lead with the VBWD assisting in analyzing the problem and determine the appropriate solution. Any permit applications for this area will be reviewed per the City of Lake Elmo Flood Plain Ordinance. Page 55 14287.000 Lake Elmo Comprehensive Plan ChapterX--Local Surface Water Management Plan Flooding near Legion Pond o Assessment of Problem:In the 1980's the VBWD reported high water levels in Legion Pond which threatened the nearby homes. Several proposals were developed to mitigate the flooding, including overflow pumping to Lake Elmo. The residents located in the floodplain rejected the pumping ' proposals,objecting to the high cost and lack of a permanent solution to the problem as reasons. The high water levels were later relieved by a onetime overflow pumping of the pond to Lake Elmo,and later by the drought of 1987-1988. Residents 1 have bermed around their homes to help protect against future high water levels. s Proposed Corrective Action: The VBWD proposed three feasible mitigation plans to the Legion Pond's high water problem: the first option involves constructing a pumped ' outlet to Lake Elmo. This option would incur annual operation and maintenance costs. The second option is to construct a gravity outlet from Legion Pond to Lake Elmo. The third option is to provide only emergency pumping relief. • Beginning in 1984,the City constructed a community wastewater facility as part of the 201 System and hooked up 2764,2778,2790,and 2814 Legion Avenue North. This addressed the location of the individual septic systems on these lots. If future flood mitigation is pursued,it will focus on the remaining septic systems not connected to the 201 System and the walk out elevations of all homes in the affected area. e The second option(constructing a gravity outlet to Lake Elmo) now becomes a more feasible option with the availability of the 201 System. The City would consider all options provided in the VBWD Plan-the preferred corrective action will depend on the timing, urgency,public comment,agency continent, and available funding. However,due to the current trend of low water levels and the Project 1007 flood-relief improvements, the City does not find any immediate need to address flooding 1 issues in this area. e The City will work directly with the VBWD to continue to monitor the situation. If potential flooding risks are identil"ied, the City will take the lead with the VBWD assisting in analyzing the problem and determine the appropriate solution. Any permit applications for this area will be reviewed per the City of Lake Elmo Flood Plain Ordinance. Page 56 14287.000 1 Lake Elmo Comprehensive Plan Chapter --Local Surface Water Management Plan • Flooding at Kelvin Avenue,north of Highway 5 ♦ Assessment of Problem:During the Park Meadows development,residents on the east side of Kelvin Avenue raised concerns about flooding. The VBWD led the efforts to expand the infiltration basin on the west side of Kelvin Avenue within the Park Meadows development. In 2008, silt was removed from the basin and it was re-vegetated. • Proposed Corrective Action: The City of Lake Elmo and the VBWD will review the basin in the summer of 2009 to evaluate if vegetation has been established. The City is f retaining$5,930 of the contractor's escrow until the infiltration area is accepted. If flooding becomes a concern,the City will s continue to work with VBWD to review improvements to the infiltration basin and potential to route overflow to Sunfish Lake if this is determined to be feasible. v ■ Low Water Levels on Sunfish Lake L • Assessment of Problem:Residents have expressed concerns related to low water levels on Sunfish Lake. ♦ Proposed Corrective Actions:the City and VBWD have discussed the problem, and agreed that there is little that the . City can do to address this issue. r b City needs to adopt and enforce the VBWD standard that minimum floor elevations of buildings be 2' or more above the 100 year flood plain and enforce the standard on development that is not reviewed I" by the Watershed District. lr • Assessment of Problem: The City agrees that the VBWD standard should be adopted and enforced for all new development. • Proposed Corrective Action:The City is adopting the Watershed District standard in its Engineering Standards,and requiring that the low floor elevation data be on record plans and recorded for each property prior to issuance of building permits. The City will adopt this standard in its Floodplain Ordinance, as a part of ordinance revisions that will occur after the adoption of the 2030 Comprehensive Plan and LSWMP. ■ Surface Water Issues related to Highway 36 Corridor Reconstruction z Page 57 14287.000 S Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan ♦ Assessment of Problem:Reconstruction of the Highway 36 Corridor will change drainage patterns, and may create impacts to surface water resources. ♦ Proposed Corrective Action: Washington County will model the unpacts of the proposed project on surface waters,and develop plans for surface water management. The VBWD will take the lead in addressing cross-community stormwater issues. The City will work with Washington County to address local issues. . 2. South Washing-ton Watershed District Area The SWWD Water Management Plan has identified the following problems in the area of Lake Elmo that is within the District. The City and District have discussed these problems, and the City is proposing the actions described here to address the problems: Wilmes Lake Flooding s g Issues ♦ Assessment of Problem:The SWWD has completed studies of Wilmes Lake and potential flooding issues. Areas in the Wilmes Lake subwatershed within Lake Elmo contribute to the lake's drainage area,but are not the cause of the flooding concern. No structures are currently below the 100-year flood elevation. The Watershed District and City of Woodbury have established and funded a program to provide protection to homes on the east side of the lake. ♦ The District is seeking additional areas for flood storage and attenuation within the subwatershed, including the area within Lake Elmo. The District has completed an analysis that identifies conceptual locations for additional storage and enhanced storage within Lake Elmo(this study and maps of storage areas are included in the Appendix). • Proposed Corrective Action:The City has reviewed the Watershed District's analysis,and concurs with the goals to provide additional and enhanced flood storage and attenuation within the Wilmes Lake subwatershed area in Lake Elmo. The City will work with the District as it develops land use plans for the area and reviews proposed development to assist the District in addressing this issue and providing additional flood storage. The City concurs with and adopts the SWWD volume control standard.in this LSWMP. I , L . Page 58 14287.000 Lake Eli-no Comprehensive Plan ChapterX-Local Surface Water Management Plan ■ Wilmes Lake Water Quality Issue ® Assessment ofProhlem: Wilmes Lake has been classified as an impaired water for nutrients. The SWWD has not completed a TMDL study for the lake, but is likely to complete a study and develop recommendations to address the nutrient problems in the future. ♦ Proposed Corrective Action:The City will participate in the . District's TMDL study for Wilmes Lake,and work with the District to implement its recommendations. The City understands that implementing volume controls will also t benefit water quality in Wilmes Lake. The City adopts the District's standards for volume control and allowable f' phosphorus loading to Wilmes Lake,and will address these requirements as it manages land use and development within the Wilmes Lake Subwatershed area, 3. Brown's Creek Watershed District ■ Impaired Waters Issues j ♦ Assessment of Problem:The BCWD area within Lake Elmo includes wetland areas.and some areas that may still be developed. The area drains to Long Lake,Brown's Creek, and the St. Croix River. All of these water bodies are impaired waters. The BWCD is currently completing TMDL studies for Long Lake and Brown Creek. The St.Croix Basin Team has i. set a goal to reduce nutrient loading to the St. Croix basin by 20 percent. • Proposed Corrective Action:The City will participate in the District's TIML studies of Long Lake and Brown's Creek, and will work with the District to implement the recommendations of these studies. The City will implement its land use plan and ordinances to assist with the protection of surface waters in this area. 4. Impaired Waters The impaired waters within Lake Elino's drainage area include the p b following: Page 59 14287.000 I . Lake Elmo Comprehensive Plan Chapter X—Local Surface Water Management Plan Table No. 3: f Impaired Waters in the City of Lake Elmo I and Its Drainage Areas i Impaired Pollutant/ TMDL TMDL Target IIII Water Affected Use Stressor Target Complete Start Date Date Aquatic consumption/ Mercury in fish tissue/ St.Croix River Nutrient/Eutrophication 2009 2011 Aquatic Recreation Biological Indicators Wilmes Lake Aquatic recreation Nutrient/Eutrophication Biological Indicators 2012 2016 Fish-IBI and Invertebrate 1131/ Lack of a coldwater Brown's Creek Aquatic life assemblage/ 2006 2009 Aquatic macroinvertebrate bioassessments Excess nutrients/ Long Lake Aquatic recreation Nutrient/Eutrophication 2008 2012 Biological Indicators Lake Jane Aquatic Consumption Mercury in fish tissue 2006 2021 Sunfish Lake Aquatic Recreation Nutrient/Eutrophication 2013 2017 Biological Indicators Perfluorooctane Sulfonate 2008 Lake Elmo Aquatic Consumption (PFOS)in Fish Tissue/ (Approved) Mercury in fish tissue Source:2008 MPC,1 List oflmpaired Waters,2008 Final TMDL list, and Watershed District Plans a. Total Maximum Daily Load(TMDL) Studies The SWWD Watershed District will be completing TMDL studies and developing plans to address the"impaired waters"issues in Wilmes Lake. The City will participate with the District in the TMDL studies and implementation plan for Wilmes Lake. The St. Croix Basin Team has set a goal to reduce nutrient loading to the St. Croix basin by 20%,to protect this Outstanding Resource Value Water(ORVW).The City has adopted a BMP in its MS4 permit to cooperate with the Watershed Districts to create a process to identify all discharges from the City's MS4 system to the St. Croix,and determine if discharges to the ORVW can be eliminated., or to identify and adopt BMP's that allow the existing high quality of the St. Croix River to be maintained. If modifications are needed, the City will modify its SWPPP and submit the modifications to the MPCA. The Citywill work with the Districts and other organizations as the g Y complete TMDL studies, and implement its land use plan and enforce its ordinances to assist in protection and improvement of these resources. Page 60 14287.000 1 Lake Etmo Comprehensive Plan ChapferX—Local Surface Wafer Managetneot Plan 5. Groundwater Issues The following groundwater-related issues were identified in the . Watershed'District Plans: i • Lake Elmo water quality _ • Assessment of Problem: Lake Elmo is a groundwater discharge waterbody. Impacts to groundwater resources may impact lake ' quality. • Proposed Action: City will implement its land use plan and ordinances to protect ground water recharge areas. ` ■ The VBWD Watershed Management Plan identifies the following i issues to address: L s Assessment of Problem:The City of Lake Elmo has a municipal well at the northeast corner of Lake Elmo. The well - is screened in the Jordan aquifer,which is the same aquifer that feeds Lake Elmo..The City,the DNR, Washington County,and the VBWD have not performed any calculations to determine [_ the long-term sustainability of the Jordan aquifer in this area and if the pumping is or will impact the water levels of the r lake.Nor has any agency determined if there will be conflict L. between the drinking water well and the lake. r ♦ Proposed Action:The City will work cooperatively with the , VBWD,the DNR, Washington County,and other entities as this issue is further studied, F ■ Special Well Construction Areas(SWCA) L r • Assessment of Problem: Special Well Construction Areas. Portions of the City in both VBWD and SWWD were designated by the Minnesota Department of Health as a Special Well.Construction Area(SWCA)in 1988 and 2007.This designation applies to the construction repair,modification, and sealing of wells and borings.The primary purpose of SWCAs is to protect public health and groundwater quality by �^ ensuring wells and borings are constructed to obtain groundwater from a protected aquifer(s)and to help prevent spread of contamination. Stormwater related activities in these areas, such as geotechnical evaluations for a pond or = infiltration feature, should reflect appropriate compliance with requirements set forth by the Department of Health given the criteria for environmental bore holes.Nonstructural methods f Page 61 14287.000 Lako Elmo Comprehensive Plan Chapter —Local Surface Water Management Plan for controlling stormwater runoff volumes should generally be f given priority over structural methods. f • Proposed Action: The City will cooperate with the MPCA, MDH,and the Watershed Districts to address groundwater quality issues, and enforce its Zoning and Subdivision ordinances to protect groundwater quality. ■ The SWWD Watershed Management Plan identifies the following issues to address: • Assessment ofProblem:The SWWD's groundwater management initiative consists of monitoring and data analysis. The objective is to compile baseline data to characterize dynamics between stormwater and groundwater. Outcomes of the groundwater management include setting or adjusting thresholds or standards to best address stormwater management and groundwater protection,and identifying potential groundwater resources trends in the context of stormwater management efforts. ♦ Proposed Action:The City will support these efforts as they relate to the area within the SWWD in Lake Elmo. The Washington County Groundwater Plan identifies the following f issues to address: ! ♦ Assessment of Problems: f Reduced groundwater recharge resulting from urbanization. I Degraded quality of groundwater as a result of increased non- point source.pollution. Reduced groundwater flows to surface waters,lowered lake Ievels, and well interference resulting from overuse of groundwater. Need for citizens and public officials to understand groundwater-related issues. ♦ Proposed Actions: The County Groundwater Plan identifies the following actions to implement: Provide education to citizens and public officials on the interaction of surface and groundwater quality and quantity;the value of and need to protect groundwater recharge areas and I .Page 62 14287,000 Lake Elmo Comprehensive Plan ChapterX--Local Surface Water Marragerrter�t Plan wetlands; and implementing best management practices and low-impact development strategies to protect groundwater resources. Adopt rules for all new developments to control stormwater j runoff volume and establish performance standards. Sections L 4.6.7 and 4.4.7 of the County Groundwater Plan call for the development of infiltration/volume control requirements. Develop and adopt rules or policies on the quantity of water used in areas where existing wells and/or groundwater dependent natural resources could be negatively impacted by Z_ . overuse of groundwater. Section 4.6.7 of the County Groundwater Plan calls for the possible development of a (' VBWD groundwater appropriations permitting program. .: • Proposed Action: The City will cooperate with Washington { County,'VBWD, SWWD,BCWD,and other jurisdictions to implement the County's Groundwater Plan. r, • Proposed Action: The City is currently completing its Spill Response and Spill Containment Plans. These plans are scheduled for completion by the end of 2009. I 6. Natural Resource Issues E` ' ■ Greenway Corridor • Assessment of Problem:The South Washington Watershed District has identified a Greenway Corridor connecting natural resource areas within the District. Two gaps exist within the Northern Subwatershed area,including Lake Elmo. The District requests that Cities adopt the corridor in their local plans,and assist with corridor protection and implementation. , ♦ Proposed Action:The City will include the Greenway Corridor r identified by the SWWD in the natural resource and land use analysis and maps included in its Comprehensive Plan, and will work with the District on land use issues and development proposals to provide protection to the corridor and its L . resources. L. Page 63 14287.000 I I I I / AAuati I I — cre� n f Brown's Creek(-Grant I i Ma tomedi e jJ _--____;t S#. Croix River i` ----- ---� W�Iler�tie Stillwater Aqua f• I Recreatio i Aquatic I �Ua� C sumptio I---------i i---IRe on Lon Lake Pine ! --- ---� r :Springs ! i � Park ---- - Heights -- !---------, --------------- -- i --- Lake Jane — — —I I, - �,\ A uatic onsumpti e01 \ Sunfish_Lake a town 11- �i Twp — I A u is I 1 Lec t n — — — — -- ---- — — — — — — ---- ---- ---- --— — -- ' qu tic Oa ale Co su Iption r� I !! Lake Elmo �I West !! Lakeland r� Twp. I p i - --r.. i� Woodbury Afton i i Wilmes Lake A tic Rection i KAgis\LAKEELM0\PR0JECTS\2009 SWMP\Maps\Figure 20-ImpairedWatersMap.mxd FIGURE 20: Legend IMPAIRED WATERS N i --_Ij City Boundary Surface Water Management Plan W E 2008TMDLLakes 2008 TMDL Streams 2030 Comprehensive Plan S City of Lake Elmo, Minnesota COT!of Map date: February 2009 0 0.5 1 2 SAKE LAKE Prepared by: Miles TKDALIMITATION OF LIABILITY This document is not a legally recorded map or survey and is not ENGINEERS-ARCHITECTS•PLANP,IERS intended to be used as one. This map is a compilation of records and information from various stale,county,and city offices,and other sources. Sources:MnDNR, TKDA Lake Elmo Comprehensive Plan ChepterX--Local Surface WaterManagemer)t Plan G. Implementation I1. Actions to Address Identified Issues Section F identified water resource management issues within the City of LaIce Elmo.The section includes goals and policies the City is adopting to address these issues. Specific implementation actions to be completed include the following: ■ The City concurs with and adopts the Watershed Districts Water Management Plans, standards,and rules. The Watershed Districts will continue to enforce surface water regulations and permitting within the City within their geographic areas. The City will coordinate its review of development proposals with the Watershed Districts and will manage land use to support protection of surface and ground waters through its Zoning and Subdivision Ordinance. ■ The City will support the Watershed Districts' implementation of their standards for management of water quantity and quality, including control of peak runoff,volume control,infiltration and filtration,wetland quality, and best management practices to control Total Suspended Solids (TSS),Total Phosphorus(TP);and runoff from development or redevelopment within the City.The Districts will play the primary role in reviewing the stormwater plans for development applications within the City,and implement their rules through the review and permit process. The City will provide comments on development applications to the Watershed Districts during the review process. ■ The City will update its ordinances to be consistent Watershed plans,standards and rules, and with NPDES construction stormwater permit requirements for erosion and sediment control. The City is in the process of updating their Stormwater and Erosion and Sediment Control Ordinance. Currently,the City Code does include provisions which outline the requirements for storm water management and erosion and sediment control;however the update process will revise language,provide clear, consistent procedures, and consolidate the information in one location. The MPCA has granted an extension for completion of this ordinance to June 30, 2009. The City will update its other ordinances within 18 months of the adoption of its Comprehensive Plan. ■ The City will cooperate with the Watershed Districts to address concerns related to impaired waters and as the Districts complete TMDL studies, and will manage land use to avoid impacts to water resources within the City. Page 65 14287.000 I. Lake Elmo Comprehensive Plan ChapterX—Local Surface Water Management Plan ■ The City will implement the mitigation plan adopted in the Lake Elmo Old Village Area AUAR as the area develops, to protect resources in the Down's Lake Watershed and downstream. ■ Complete the MPCA requirements for ORVW by the end of 2009. • The City will work directly with the VBWD to continue to monitor the situation in the Friedrich's Pond.area. If potential flooding risks are identified the City will take the lead with the VBWD assisting in _ analyzing the problem and determine the appropriate solution. Any permit applications for this area will be reviewed per the City of r Lake Elmo Flood Plain Ordinance. • The City would consider all options provided in the VBWD Plan for addressing flooding issues near Legion Pond. The preferred corrective action will depend on the timing,urgency,public comment,agency comment,and available funding: The City will f work directly with the VBWD to continue to monitor the situation. If potential flooding risks are identified,the City will take the lead with the VBWD assisting in analyzing the problem and determine the appropriate solution. Any permit applications for this area will be reviewed per the City of Lake Elmo Flood Plain Ordinance. ■ The City will work with the SWWD to identify additional flood storage in the Wilmes Lake subwatershed,and provide additional storage as development or redevelopment occurs within the subwatershed. ■ The City will complete its illicit discharge ordinance and spill containment plan in 2009. The City has developed a storm sewer map to identify the drainage path of a spill contaminant(see storm U. sewer map). The City is working on gathering and surveying additional information to develop a regulatory control program. Per the S WPPP,the City will also create an illicit discharge ordinance in 2009. The City will continue to evaluate the effectiveness of the illicit discharge detection and elimination program. f 2. Funding Mechanisms Lake Elmo owns and manages the storm water management facilities identified on Figure 16,with the exception of the 1007 System installed by VBWD.The City uses general fund revenues to fund improvements when needed to address water quality and quantity concerns and maintain these facilities in good working order. The City's commitments to system maintenance are described in detail in its MS4 permit and SWPPP. Page 66 14287.000 I Lake Elmo Comprehensive Plan Chapter —Local Surface Wafer Management Plan The City requires that developers finance the improvements that are required with new development and redevelopment to ensure that private developments meet City and watershed requirements. 3. Capital Improvement Plan(CIP) The City's current Capital Lnprovement Plan(CIP) is included in the Appendix. 4. City Ordinances i The City has adopted ordinances that provide standards and regulations to manage water resources.These include the following: Chapter 53 Stormwater Management Utility Chapter 91 Forests and Trees i . Chapter 152 Flood Plain Management Chapter 153 Subdivision Regulations Chapter 154 Zoning Code After the SWMP and 2030 Comprehensive Plan are adopted,the City will revise or update its ordinances as described in the Goals and Policies section of this plan,to ensure that they meet state requirements and are consistent with the goals of this Plan. Ordinance updates will be completed within 18 months of the adoption of the Comprehensive Plan and LSWMP. 5. City Process The City of Lake Elmo reviews proposed development per its Subdivision Ordinance.Design must be in compliance with Engineering Design Standards.An approved Watershed District permit is required prior to final plat acceptance. WCD approval of any wetland impact must be provided if located in BCWD or SWWD.Any impacts to public waters must be reviewed by the DNR. A NPDES Permit must be received from the MPCA when applicable.An approved SWPPP must be provided for all subdivisions.No building permit will be issued until the following has been completed: a. All required recordings are documented. b. Record Grading Plan is received and approved for the development (permitted model home(s) are the exception). I Page 67 14287.000 Lake Elmo Comprehensive Plan Chapter —Local Surface Water Management Plan e. A drainage and utility easement must be provided to the 100-year flood elevations for all storm water facilities. d. All Low Floor elevations must be shown on the Record Plans and recorded with Washington County(recording of low floors required in VBWD only). e. The building permit process must follow the attached procedure before a Certificate of Occupancy is given. The City has developed a handout to assist in the process for new home development. A copy of this handout is available in the Appendix. f i_ l_ r F s Page 68 14287.000 Lake Elmo Comprehensive Plan ChapterX—Local Surface Wafer Management Plan H. Administration 1. Review and Adoption Process The City will provide draft copies of this Local Surface Water ' Management Plan to the local Watershed Districts for review and comment. The plan will be submitted to the Metropolitan Council as part of the City's Comprehensive Plan, and will be adopted by the City when approved by the Metropolitan Council. 2. Plan Amendments and Updates City Comprehensive Plans are updated every ten years.Local Surface Water Management Plans must be updated within two years of completion of the Watershed Districts' Watershed Management Plans. The City will update its Local Surface Water Plan along with its Comprehensive Plan, or as needed to comply with state rules related to LSWMP updates to be consistent with Watershed Plans. The Valley Branch Watershed District adopted its current plan in 2005, and will update its plan in 2015. The South Washington and Brown's Creels Watershed Districts adopted their current plans in 2007,and will update their plans in 2017. Substantive revisions to the goals and objectives,the adoption of new or revised standards or rules,and major revisions to the CIP or administrative procedures of the watershed plans will require an amendment to this plan and approval by the City Council. Annual work plans completed during the beginning of the calendar year by the City Council will serve to guide the immediate activities of the City. The periodic CIP updates will help focus the work plans by J identifying projects requiring substantial planning and financial resources for successful completion. Capital storm water improvements may be f proposed by other local, state,and federal agencies as well. l Understanding capital improvements planned by others is important because of the potential impact to the water resources of the City. 1 I . Page 69 14287,000 Lake Elmo Comprehensive Plan ChapterX—Loca/Surface Water Management Plan 1. Appendix L I' L f ' L. r° k_ L r : I , r l: E -Page 70 14.287.000 a] L. APPENDIX A Lake Water level report Lake name: DeMontreville County: Washington Water Level Data DeHontrev.ille - 82019100 Period of record: 06/30/1960 to 12/01/2007 930 #of readings: 649 Highest recorded: 930.64 ft(07/01/1984) 929 Lowest recorded: 924.24 ft(12/01/1960) f 01 { Recorded range: 6.4 ft 928 1 Last reading: 927.07 ft(12/01/2007) Ordinary High Water Level (OHW) elevation: W 927 929.3 ft Datum: NGVD 29 (ft) 926 1999 2000 2001 2002 2003 2004 2005 2a06 2007 Last 10 years of data, click to enlarge. Benchmarks Elevation: 938.49 ft Date Set: 12/15/1997 Benchmark Location Datum: NGVD 29 Township: 29 Range: 21 Section: 5 (ft) Description: Set by Trails and Waterways. "Bent 60d spike in west side of 18" red oak approximately P'above the ground" The oak is located approximately 210' north of the DNR boat launching ramp and 25'from the edge of the lake. Elevation: 933.8 ft Date Set: 07/15/1993 Benchmark Location ` Datum:NGVD 29 Township: 29 Range: 21 Section: 9 (ft) Description: Set by Boerhave Land Surveying Inc. "Spike in a 14" oak tree located near the outlet of Olsen Lake" Valley Branch WSD Datum plus .22' equals 1929 Datum. Lake information report Name: DEMONTREVILLE Nearest Town: Lake Elmo Survey Date: 06/13/2005 Primary County: Washington Inventory Number: 82-0101-00 Public Access Information Ownership Type Description Finnesota DNR lConcrete Public access on the NW shore, Lake Characteristics Lake Area(acres): 143.00 Dominant Bottom Substrate: N/A Littoral Area(acres): 129.00 Abundance of Aquatic Plants: N/A Maximum Depth(ft): 24.00 Maximum Depth of Plant Growth (ft): N/A Water Clarity (ft): 16.50 Did you know? The DNR Section of Fisheries has a frill-time staff of 285. There are 6 regional and 28 area fisheries offices. Fish Sampled up to the 2005 Survey Year Number of fish per net Average Fish Weight Species Gear Used Normal Mange(lbs) Caught Normal Range (lbs) Black Bullhead Gill net 1.5 7,7- 104,7 .80 12-0,5 Trap net 0.4 1.5-58,0 1.06 .2-0,5 lack Cra pie Gill net 1.5 1.7- 175 118 .1-0.3 Trap net 2.0 .1-24.1 .22 .2-0.4 rue ill Gill net 14.2 /A-NIA 0.07 /A-N/A Trap net 55.4 3,5-57.1 .09 .1-0.3 Brown Bullhead ill net .8 .8-7.0 .50 .3-0.8 Trap net .6 0.4-5.1 .91 .4-0.9 Green Sun rslr frap net 0.2 0.3-2.8 0.05 .l -0.2 Hybrid Sunfish jill net 1.2 NIA-N/A 0.06 WA-N/A rap net 9,0 N/A-N/A 0.13 N/A-N/A LarWeinoulh Bass Al net 1.5 0,3-0.6 1.72 0-1.5 Trap net 0,3 0.2-0.8 0.76 .3-1,5 4'orll ern Pike Gill net 10.3 .0- 10.8 2,64 1.7-3.1 Trap net 0.6 N/A-N/A 2.59 /A-N/A on kinseed ill net 4,8 N/A-N/A 0.10 /A-N/A un t.sh Trap net 3.4 0.7-6.5 0.23 1-0,2 Walle e 3ill net 0.2 .8-3.8 2.18 1.4-3.0 While Sucker 3ill net 0.5 .5-2.3 2,54 1,6-2.5 Yellow Bullhead il]net 2.8 .5-5.0 .53 .4-0.8 rap net 11.8 1.0-7.1 0.63 .4-0,8 Yellow Perch IGill net 1.5 .0-22.3 ,I 1 PA-0.2 Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics. Length of Selected Species Sampled for All Gear for the 2005 Survey Year Species Number offish caught in each category(inches) 0-5 6-8 9-11 12-14 15-19 20-24 25-29 30+ Total Black Bullhead 0 2 5 6 0 13 Black Cra ie 6 1 0 27 Blue ill 197 36 0 0 0 233 Brown Bullhead 0 1 21 24 0 46 Green,Stua tsh 2 Hybrid Sunfish 64 4 0 88 Largemouth Bass I 1 7 3 0 12 Northern Pike 0 55 5 0 67 Pum rkinseed Sur:tsh 38 22 0 60 1Falleve 101 0 1 Yellow Bullhead I 15 P2 115 10 10 1123 Yellow Perch 17 150 9 For the record, the largest 5mal/ntouth Bass taken in Minnesota weighed 8 lbs. and was caught by: Who: John Creighton, Minneapolis, MN Where: W. Battle Lake, Otter Tail County When: 1948. Fish Stocked by Species for the Last Five Years Year Species Age Number 2001 11'alleve Fingerling 22,392 14'alleve Fry 374,400 2003 11'alleve Fry 312,000 11'alleve Fingerling 7,052 20Q5 11 olleve Fingerling 46,127 11•alleve Fry 416,000 11 alleve Yearling 12 Fish Consumption Guidelines These fish consumption guidelines help people snake choices about which fish to eat and how often. Following the guidelines enables people to reduce their exposure to contaminants while still enjoying the many benefits from fish. Pregnant Women,Women who may become pregnant and Children under age 15 LAKE NAME Meal Advice County,[)Own) Species Unrestricted 1 meallweek I meaVmonth Do not eat Contaminants DEMONTREVILLE Bluegill Sunfish Ail sizes Washington Co.,82010100 General Population LAKE NAME Species Meal Advice Contaminants County,DOWID Unrestricted I 1 meal/week I 1 meaUmonth Do not eat DEMONTREVILLE Bluegill Sunfish Esi zes Washington Co.,820 10 100 DOWID - MN DNR, Divion of Waters' lake ID number. Contaminants listed were measured at levels high enough to warrant a recommendation to limit consumption. Listing of consumption guidelines do not imply the fish are legal to keep, MN DNR fisliilg regulations should be consulted. Dioxin Merculy i PCBS -Polychlorinated bi.phenvls P.FOS -Perfluorooctane sulfanate Status of the Fishery (as of 06/13/2005) Bluegill continue to be present in high.abundance and small average size in DeMontreville Lake. The average Bluegill sampled in 2005 was 5.2" long and 0.09 pounds. Only 14%of the Bluegill captured measured over 6.0" in length. Pumpkinseed.sunfish are present in below average number, but some quality size individuals are present. The average Pumpkinseed sampled was 6.15" long and 0.226 pounds. Over 25% of the Pumpkinseeds captured measured 7.0" or larger. The largest individual sampled was 8.82" long and weighed 0.60 pounds. Black Crappie were sampled in below median numbers and averaged 7.62" long and 0.21 pounds.Northern Pike were captured above median levels for abundance and at the highest gill net catch rate ever recorded for this.lake. The average Northern.Pike captured was 22.45" in length and 2.64 pounds. Only one Walleye measuring 18.7" and weighing 2.18 pounds was netted. Yellow Perch were sampled below the normal range for abundance and at the lowest gill net catch rate recorded since 1989. Largemouth Bass were captured in good numbers with some quality individuals(over 20.0")present. While the average Largemouth Bass sampled was 11.46" long and 1.17 pounds, over 30%of all the fish.captured measured 16.0" or longer. Lake water level report Lake name: Eagle Point County: Washington Water Level Data Period of record: 09/20/1969 to 10/27/2007 # of readings: 403 Highest recorded: 899.53 ft(05/18/1986) Lowest recorded: 892.13 ft(08/01/1988) Recorded range: 7.4 ft Last reading: 8 94.2 8 ft(10/27/2007) Ordinary High Water Level (OHW) elevation: 896.5 ft Datum: NGVD 29 (ft) Last 10 years of data, click to enlarge. Benchmarks No benchmark information available. Lake water level report Lake name: Elmo County: Washington Water Level Data Period of record: 08/19/1969 to 10/23/2008 # of readings: 476 - Highest recorded: 887.73 ft (07/05/1978) Lowest recorded: 878.15 ft(10/31/1969) Recorded range: 9.58 ft Last reading: 883.54 ft(10/23/2008) Ordinary High Water Level (OHW) elevation: 885.6 ft Datum: NGVD 29 (ft) Last 10 years of data, click to enlarge. Benchmarks Elevation: 889.49 ft Date Set: 01/09/1997 Benchmark Location Datum: NGVD 29 Township: 29 Range:'21 Section: 24 (ft) Description: Found 2008. Railroad spike in the SW root of a 4.0' cottonwood, 0.6' above the ground, 60' E. of current gage location on the ESE side of the lake, near edge of lake at toe of County Road 17 and at the north end of the guard rail along highway 17, approx. 50'N of outlet. Elevation: 895.23 ft Date Set: 11/17/1989 Benchmark Location Datum: NGVD 29 Township: 29 Range: 21 Section: 24 eft) Description: Benchmark was described by Bruce A. Folz& Associates as "Railroad spike in north face of power pole one foot above ground and located in the southeast corner of the intersection of Lake Elmo Avenue and 24th Street North. Lake information report Name: ELMO Nearest Town: LAKE ELMO Survey Date: 06/11/2001 Primary County: Washington Inventory Number: 82-0106-00 Public Access Information Ownership Type Description County Concrete lWest shore of take, within Lake Elmo Regional Park. Lake Characteristics Lake Area (acres): 206.00 Dominant Bottom Substrate: sand, silt, gravel Littoral Area (acres): 44.50 Abundance of Aquatic Plants: abundant Maximum Depth(ft): 140.00 Maximum Depth of Plant Growth (ft): 17.00 Water Clarity (ft): 14.00 Did you know? Habitat acquisition of lands next to lakes and streams protects spawning areas and shoreline vegetation, and it increases access to fishing waters. Fish Sampled up to the 2001 Survey Year Number of fish per net :Average Fish N1'cip1ht N•or.rrr;rl Ramie(Ibs) Species Gear UsedCaught \L.nrm:rl Rnrr_e (lbs} Llad--Crao ie Trap net 1.3 0.5-2.2 0,20 .3-0.5 Blrre ill Gill net 1.5 N/A-NIA 0.04 /A-N/A Trap net 82.9 7.7-43.4 0.09 0.1-0.2 Brown Trow Al net .3 /A-N/A 2.28 /A-N/A rap net .1 N/A-N/A 3.53 N/A-N/A Common Carp Ftap net .3 0.1 -0.9 5.66 3.1 - 10.6 Lai ernourh Bass Ill net .2 .5- 1.7 3.65 .5- 1.2 1or•lhern Pike Gill net 12.2 2.2-8.7 1.81 1.5-3.2 Puna rkinseed rap net 0.3 1.4-5.9 0.05 .1-0.2 f11 dS/I Rain1)o 1 rr Tv o i f Gill net 1.5 N/A-NIA 3.86 NIA-N/A Tullibee(Cisco) Gill net 5,8 1.3- 10.4 0,65 3- 1.0 Tiger Muskellunge Gill net 0.2 NIA-N/A 2.65 /A-N/A 11 olleve Gill net 1.5 1.0-5.0 2.69 1,2-3,0 Trap net 0.1 0.2-0.7 2.76 .7-2.9 White Sucker Gill net 0.7 0.5-2.0 2.52 1,6-2,6 Yellow Perch Gill net 0.3 1.5- 13.8 0.08 0.1 -0.2 rap net 10.1 PA-2.3 19.04 10.1 -0.2 Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics. Length of Selected Species Sampled for All Gear for the 2001 Survey Year Number of fish caught in each category(inches) Species 0-5 6-8 9-I1 12-14 15-19 20-24 1 25-29 30+ Total Black Cra 1 lie 1 0 0 12 Blere ill 154 51 0 0 215 Brown Trott! 5 9 1 15 lwr emowh Bass 1 0 0 1 Norlhern Pike 35 24 2 71 Pumpkinseed Sxa1 rsh 0 0 0 3 Ralrrbow Trorrl S 4 0 9 Tullibee(Cisco) I 10 0 1 0 0 35 Tiger Muskellunge 0 1 0 0 1 I f'ollere P P 3 1 0 10 Yellow Perch 3 0 3 For the record, the largest Golder: Redhorse taken in Minnesota weighed 2 lb., 13.28 oz, and was caught by; Who: Andrew Bakken, Glyndon, MN Where: Otter Tail River near Fergus Falls When: 7/13/97. Statistics: 19" length, 11 1/4" girth Fish Stocked by Species for the Last Five Years Year Species Age Number 2001 Brown Trout Adult 386 Ra11nb0IV Troui - Adult 181 Tiger Muskellunge Fingerling 206 ff alleye Fry 50,094 2002 Rainboir Trout Adult 68 Tiger Muskellunge Yearling 3 2003 Tiger Muskellunge Fingerling 206 11[rllere Unknown 6,750 2004 Brou•nr Trout Adult 160 ltainbou•Troru Adult 212 2005 R-own Trout Adult 62 it4rllere Fingerling 1,196 Fish Consumption Guidelines These fish consum tion guidelines help people make choices about which fish to eat and how often. Following the guidelines enables people to reduce their exposure to contaminants while still enjoying the many benefits from fish. Pregnant Women, Women who may become pregnant and Children under age 15 LAKE NAME Meal Advice Contaminants County,DOWID Species Unrestricted I meal/week I meal/month Do not eat u.• - ELMO Bluegill Sunfish All sizes Mercury RFOS Washipgton Co.,82010600 Bullhead All sizes Mercury— F Carp All sizes Mercury Crappie All sizes Mercury PFOS Largemouth Bass All sizes Mercury PFOS Northern Pike shorter than 21" 2 1"or longer Mercury Walleye All sizes Mercury White Sucker All sizes General Population LAKE NAME Meal Advice Contaminants County,DOWID Species Unrestricted t meallweek 1 mealImonth Do not eat ELMO Bluegill Sunfish All sizes PFOS Washington Co.,82010600 Bullhead All sizes Mercury Carp All sizes Crappie All sizes PFOS Largemouth Bass All sizes Mercury PFOS Northern Pike All sizes Mercury Walleye All sizes Mercury White Sucker All sizes DOWID - MN DNR, Divion of Waters' lake ID number. Contaminants listed were measured at levels high enough to warrant a recommendation to limit consumption. Listing of consumption guidelines do not imply the fish are legal to keep, MN DNR fish regulations should be consulted. Dioxin Mercury PCBS - Polychlorinated biphenyls PFOS - Perfluorooctane sulfanate Status of the Fishery (as of 06/11/2001) Lake Elmo is primarily managed for walleye. The gill net catch of 1.5/set is slightly below the historical average for this lake. The average size sampled was 18.7 inches in length and 2,69 pounds. Northern pike are very abundant, They average 19.7 inches and 1.8 pounds, but individuals over 30 inches are present. Hybrid (Tiger) muskellunge are present but in low numbers. Bluegills are abundant but are smaller on average than-most anglers prefer. However, some larger individuals do exist. Black crappies are present in average numbers for this type of lake. They average 6.4 inches in length, although a few over 10 inches exist. Surplus adult broodstock brown trout and rainbow trout were stocked in 2001. They provide a unique, but short lived fishery due to the numbers stocked. Lake water level report Lake name: Horseshoe County: Washington Water Level Data Period of record: 03/07/1969 to 10/27/2007 # of readings: 390 Highest recorded: 878.02 ft (10/01/1996) Lowest recorded: 862.28 ft(03/07/1969) Recorded range: 15.74 ft i Last reading: 874.06 ft (10/27/2007) Ordinary High Water Level OHW elevation: 876.8 ft Datum: NGVD 29 (ft) I Last 10 years of data, click to enlarge. Benchmarks No benchmark information available. i Lake information report Name: Horseshoe Nearest Town: Lake Elmo Survey Date: 08/10/1993 Primary County: Washington Inventory Number: 82-0074-00 Lake Characteristics Lake Area(acres): 53.00 Dominant Bottom Substrate: N/A Littoral Area (acres): NIA Abundance of Aquatic Plants: N/A Maximum Depth(ft): 11.30 Maximum Depth of Plant Growth (ft): N/A Water Clarity (ft): N/A Did you know? Much of Minnesota's fisheries program is reimbursed by the Federal Aid in Sport Fish Restoration Program (federal excise tax), administered by the U.S. Fish and Wildlife Service. Fish Sampled up to the 1993 Survey Year Number of fish per net :lrera_c fish\�'ci0ht Species Gear Used Normal Ranee(lbs) Caught Normal Range (lbs) Black Bullhead Gill net 6.o N/A-N/A 0.39 /A-N/A Trap net 0.1 N/A-NIA 0.11 NIA-NIA Black Cra n Gill net 19.0 /A-NIA 0.13 N/A-N/A Trap net 318 /A-NIA 0.16 /A-N/A 8111e il! rap net 16.9 /A-NIA 0.0$ /A-N/A Common Carp Gill net 1.0 /A-N/A 2.26 /A-N/A Trap net 0.4 IA-NIA 2.28 /A-N/A Golden Shiner Trap net .1 /A-N/A 0.05 N/A-NIA Lar enrorrth Bass Trap net 12 /A-N/A 2.11 /A-N/A Northern Pike Trap net .2 /A-N/A 9.49 /A-N/A Ym»Lkinreed Srar islr Trap net .4 /A-N/A 0.05 /A-N/A Snapping Turtle Trap net .3 /A-N/A ND N/A-NIA Tiger Muskellunge Trap net .2 /A-N/A 11.30 N/A-NIA White Sucker Trap net 1 NIA-N/A 1.90 N/A-NIA Yellow Perch Gill net 3.0 /A-N/A 0.11 N/A-N/A Trap net 1.0 NIA-N/A 0.09 /A-N/A Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics. Length of Selected Species Sampled for All Gear for the 1993 Survey Year Species Number offish caught in each category(inches) 0-5 6-8 9-11 12-14 15-19 20-24 25-29 30k Total Black Bullhead 1 3 3 0 0 7 lock Crn ie 38 lit 7 0 0 156 hue ill 116 0 0 0 1 117 -ar eniouth Bass l 0 0 10 0 torrhern Pike Pumpkinseed Sunfish Tiger Muskellunge 0 0 0 2 2 Yellow Perch 5 0 12 For the record, the largest Smallmouth Buffalo taken in Minnesota weighed 13 lbs., 4 oz. and was caught by: Who: Stephen Cook, Prior Lake,MN 11/11/93. Where: Mississippi River, Ramsey County When: Statistics: 28" length, 22" girth Fish Consumption Guidelines No fish consumption guidelines are available for this lake. For more information, see the "Fish Consuml2tion Advice" pages at the Minnesota Department of Health. Status of the Fishery (as of 08/10/1993) STATUS OF FISHERY: The fish population of this lake is dominated by small crappie and small bluegill. Less than 1%of the crappie sampled and none of the bluegill sampled were large enough for most anglers to keep. Two sub-legal hybrid muskie and two larger northern pike, believed to be migrants from Lake Elmo, were taken during this investigation. Local reports indicate that 30 to 40 inch hybrid muskie are caught quite readily in this lake. The lack of public access and suitable parking area are major limiting factors to fishing on this lake. Lake water level report Lake name: Jane County: Washington Water Level Data Period of record: 02/01/1968 to 12/01/2007 #of readings: 784 Highest recorded: 927.71 ft(08/01/1986) Lowest recorded: 918.38 ft(03/22/1968) Recorded range: 9.33 ft Last reading: 920.86 ft(12/01/2007) Ordinary High Water Level (OHW)elevation: 924 ft Datum: NGVD 29 (ft) Last 10 years of data, click to enlarge. Benchmarks Elevation: 928.77 ft Date Set: 01/15/1997 Benchmark Location Datum: NGVD 29 Township: 29 Range: 21 Section: 10 (ft) Description: Set by DNR Survey Crew. "Horizontal 60d spike in the north side of a transformer pole,22' south-southwest of the manhole for the pipe between Deer Park Pond and Hedges Pond" Elevation: 925.35 ft Date Set: 01/15/1997 Benchmark Location Datum:NGVD 29 Township: 29 Range: 21 Section: 9 (ft) Description: Barr Engineering Set this B.M. "top of a green steel fencepost with a white top, near waters edge of Hedges Pond and just north of the pipe between Deer Park and Hedges Pond". Lake information report Name: Jane Nearest Town: Lake Elmo Survey Date: 06/25/2007 Primary County: Washington Inventory Number: 82010400 Public Access Information Ownership Type Description DNR Concrete 10n SSE shore of lake Lake Characteristics Lake Area(acres): 152.75 Dominant Bottom Substrate: Sand(Abundant) Littoral Area (acres): 104.01 Abundance of Aquatic Plants: 20 Varieties Sampled Maximum Depth(ft): 39 Maximum Depth of Plant Growth(ft): 7.1 (6-8) Water Clarity (ft): 14 Did you know? Lake rehabilitation projects reclaim waters suffering from habitat degradation and overpopulation of some fish species. Fish Sampled for the 2007 Survey Year Number of fish per net AvcraLe Fish NN'60tt Normal Rani ]bs (e Species Gear Used 1 - ) Caught Norrnal RRLMN (bs) Black Bullhead Trap net 0.33 .7-25.7 0.88 .3-0.6 Oil]net 1.67 2.5-45.0 0.44 3-0.7 Block Cra ire Trap net 0.89 1.8-21.2 0.29. ,2-0.3 ill net 5.67 .5- 16.5 .12 .1-0.3 ue ill rap net 43.56 7.5-62.5 0.10 ,1-0.3 ill net 2.33 N/A 0.11 N/A Green Sunfish rrap net 1.22 ,2-13 0.08 ,1-0.2 Hybrid Sunfish Trap net 5.11 /A .21 /A Gill net .67 N/A 0.19 N/A Largemouth Bass Trap net .44 .2-0.7 1,72 .2-0.9 Gill net .67 .3-0,8 1.23 ,4- 1.0 Nbrlhern Pike rap net .11 /A .80 /A ill net 14.67 1.5-7.3 1.42 ,0-3.5 Pumpkinseed rap net .00 .7-4.2 .20 .1-0.2 ill net 1.67 N/A 0.17 /A 11,'alleve ill net 0.33 12-6.3 .19 1.2-2,7 Yellow Bullhead rap net 2.67 .9.5.7 0.67 .5-0.8 Lill net P.67 .5-7.5 .52 .5-0.8 Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics. Length of Selected Species (Trapnet, Gillnet) Sampled for the 2007 Survey Year Species Number of fish caught in each category(inches) 0-5 6-8 9-11 1 12-14 15-19 20-24 25-29 1 30+-F7UtalJ black bullhead 0 21 8 black crappie 9 14 5 bluegill 60 1132 0 0 0 399 seen sunfish 9 0 0 0 11 hybrid sunfish l 8 30 0 0 0 0 0 8 largemouth bass 5 12 7orlhern pike 4 53 l 1 1 93 umpkinseed 17 4 I walleye 1 V VE 1 yellow bullhead 1 9 8 4 For the record, the largest Brow: Trout taken in.Minnesota weighed 16 lbs., 12 oz. and was caught by: Who: W. Landis Bullock, Smithfield, NC Where: Lake Superior, St. Louis County When: 6/23/89. Statistics: 31.4" length, 20.6" girth Fish Stocked by Species for the Last Five Years Year Species Age Number Fish Consumption Guidelines These fish consumption guidelines help people make choices about which fish to eat and how often. Following the guidelines enables people to reduce their exposure to contaminants while still enjoying the many benefits from fish. Pregnant Women,Women who may become pregnant and Children under age 15 LAKE NAME Meal Advice County,DOWID Species Unrestricted I mealhseck I meal/month Do not eat Contamidanls JANE Bluegill Sunfish All sizes Mercury Washington Co.,82010400 Bullhead' All sizes Mercury Northern Pike shorter than 25" 25"or longer Mercury General Population LAKE NAME Meal Advice County,DOWID Species Unrestricted I meal/meek I meal/month Do not eat Contaminants JANE Bluegill Sunfish All sizes Mercury Washington Co.,82010400 Bullhead All sizes Mercury Northern Pike shorter than 2l" 21"or longer Mercury DOWID - MN DNR, Divion of Waters' lake ID number. Contaminants listed were measured at levels high enough to warrant a recommendation to limit consumption. Listing of consumption guidelines do not imply the fish are legal to keep, MN DNR fishing regulations should be consulted. Dioxin Mercury PCBS - Polychlorinated biphenyls PFOS - Perfluorooetane sultanate Status of the Fishery (as of 06/25/2007) Management efforts on Jane Lake have primarily focused on Largemouth Bass (LMB). An experimental regulation requiring the release of all LMB between 12 and 16 inches total length (TL) was in effect from 1986 to 1993. The regulation was intended to reduce the harvest of LMB and thereby improve the Bluegill (BLG) size structure through predation. Evaluation of that regulation showed no positive response by the BLG population, so the regulation was discontinued. A new experimental regulation was implemented in 1997 requiring the release of all LMB caught. The objective of this regulation was to maintain the numbers of LMB 16.0" TL. and larger at a minimum of 40 percent of the spring electrofishing catch. This catch-and-release only regulation for LMB was made permanent in 2006. In 2007, the gill net catch rate for Northern Pike (NOP) was the highest ever recorded for this lake. The average size of gill net sampled NOP was 17.4 inches and 1.30 pounds. Only 2.5 percent of all NOP captured measured 26.0 inches or longer, with the largest fish captured measuring 38.27 inches. One 18.98 inch Walleye (WAE) was captured during this survey. .Largemouth Bass (LMB)were sampled above median levels for abundance in both gill and trap nets.The electrofishing catch rate for LMB was the lowest recorded since 1994. This could be a direct result of low water levels and the displacement of fish from normal areas. The average size LMB captured by electrofishing was 12.2 inches and 1.2 pounds. The proportion of LMB sampled over 12.0 and'16.0 inches.was comparable to electrofishing efforts since the year 2000. No Yellow Perch(YEP)were captured during this fisheries survey. Bluegill (BLG)-abundance in the trap net sample,while almost half of that observed in 2002, still remains above the median level for lakes of this type. The average size of BLG sampled was 4.9 inches and 0.10 pounds. Only 15.3 percent of sampled BLG measured 7.0 inches or longer with individuals up to 8.19 inches being captured. Black Crappie (BLC) were sampled below median levels for abundance for both gill and trap nets,with the average size of BLC captured measuring 6.85 inches and 0.175 pounds. Approximately one-third of all BLC captured measured 8.0 inches or longer. ? Lake water level report Lake name: Olson County: 'Washington Water Level Data Period of record:'07/05/1978 to 04/28/2008 #of readings: 64 Highest recorded: 932.07 ft(08/01/2004) Lowest recorded: 927.09 ft(08/01/2007) Recorded range: 4.98 ft Last reading: 928,44 ft(04/28/2008) Ordinary High Water Level (OHW)elevation: 929.3 ft Datum: NGVD 29(ft) Last 10 years of data, click to enlarge. Benchmarks Elevation: 934.03 ft Date Set: 01/15/1997 Benchmark Location Datum: NGVD 29 Township: 29 Range: 21 Section: 9 (ft) Description: Found 2006. Slightly bent horizontal 3/8" x 8" spike in the south side of a 1.2' oak, 15'NW of manhole for outlet structure located at edge of the road and 15' SW of mailbox#8241 on E side of the lake on Hidden Bay Trail. Elevation: 930.83 ft Date Set: 01/15/1997 Benchmark Location Datum:NGVD 29 Township: 29 Range: 21 Section: 9 (ft) Description: Set by Barr Engineering Company "top of a steel fencepost(marked with another steel fencepost) at edge of Olson Lake just SW of outlet pipe" Lake information report Name: OLSON Nearest Town: Lake Elmo Survey Date: 08/02/2005 Primary County: Washington Inventory Number: 82-0103-00 Public Access Information Ownership Type Description Minnesota DNR Concrete Via channel from Demontreville Lake. Public access on he NW shore. Lake Characteristics Lake Area(acres): 79..00 Dominant Bottom Substrate: N/A Littoral Area (acres): 79.00 Abundance of Aquatic Plants: N/A Maximum Depth (ft): 15.00 Maximum Depth of Plant Growth (ft): N/A Water Clarity(ft): 5.10 Did you know? Habitat acquisition of lands next to lakes and streams protects spawning areas and shoreline vegetation, and it increases access to fishing waters. Fish Sampled up to the 2005 Survey Year Number or fish per net "'is""'ei M Normal Ranee Ibs Species Geur Used -( Caught Normal Rain e (Ibs) Slack Bullhead Gill net 0.5 8.0-90.0 0.34 0.1-0.4 Slack OW pi ill net 3.0 .0- 19.0 0.16 0.1 -0.2 Trap net 1.0 1.3-27.7 0.39 .1-0.4 Blrveill ill net 8.0 NIA-N/A 0.06 /A-N/A Trap net 58.9 2.8-43.3 .06 .1-0.3 Brown Bullhead Gill net 12,5 1.0-9.3 .77 .2-0.7 Trap net 0.4 0.2-6.2 .65 .4-0.9 Teen Sun fis Trap net .i A-3.8 0.03 0.1 -0.2 Hybrid Sunfish Gill net i.0 /A-N/A 0.07 N/A-NIA Trap net .8 /A-N/A 0.07 /A-N/A L r>emorith Bass Gill net .5 L0-3.8 0.18 .2.0.7 rap net 0.2 0.2- 1.1 3.71 0.3- 1.0 Yorlhern Pike Gill net 18.5 1.5-9.0 1.89 1.8-3.7 Trap net 0,2 N/A-N/A 1.84 N/A-N/A Prier akirrseed Sun ish Gill net 5.5 NIA-NIA 0.13 N/A-N/A 'rap net 2.0 0.8-9.3 0.20 0.1 -0.2 Waller•e Gill net 2.0 .3- 17.8 143 0.7-2.1 Trap net 0.2 .3-1.3 .86 .7-2.2 While Sucker Gill net 1.0 1.0-6,6 .70 .0-2.2 Yellow Bullhead Gill net 180 t-5 .0-4.1 .74 .5-0.7 rap net 3.1 .3-4.2 .70 .5-0.8 Yellow Perch ill net 3.5 -25.8 ,1 I .1-0.2 Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics. Length of Selected Species Sampled for All Gear for the 2005 Survey Year Number of fish caught in each category(inches) Species 0-5 6-8 9-11 12-14 15-19 20-24 25-29 30+ Total Black Bullhead 0 l 0 0 1 Black Crappie 11 4 0 1.5 Blrre ill Z06 8 0 0 214 Brown Bullhead 0 5 9 Green Saorra4 1 I Hybrid Sua,ish 70 79 Lar emaruh Bass 1 2 3 N'or•tlaer n Pike I l0 6 Z 139 Pumpkinseed Sunfish I5 14 9 1d�allere l Yellow Bullhead 1 10 5 18 [7' Yellow Perch 7 For the record, the largest Sauger taken in Minnesota weighed 6 lbs., 2.75 oz. and was caught by: Whp: Don Kizer, Red Wing, MN Where: Mississippi River near Red Wing (L&D No.3), Goodhue County When: 5/23/88. Statistics: 23 7/8" length, 15" girth Fish Stocked by Species for the Last Five Years Year Species Age Number 2001 Walleye Fingerling 2,340 2003 111'alleve Fry 104,000 Fish Consumption Guidelines These fish consumption guidelines help people make choices about which fish to eat and how often. Following the guidelines enables people to reduce their exposure to contaminants while still enjoying the many benefits from fish. Pregnant Women,Women who may become pregnant and Children under age 15 LAKE NAME Species Meal Advice Contaminants County,DOWID Unrestricted 1 meal/week I meallmonth Do not eat OLSON Bluegill Sunfish All sizes Washington Co.,82010300 Bullhead All sizes Northern Pike All sizes Mercury Walleye All sizes Mercury General Population LAKE NAME ;Heat Advice County,DOWID Species unrestricted 1 meal/week 1 meal/month Do not eat Contaminants OLSON Bluegili Sunfish All sizes Washington Co.,82010300 Bullhead All sizes Northern Pike All sizes Walleye All sizes DOWID - MN DNR, Divion of Waters' lake ID number. Contaminants listed were measured at levels high enough to warrant a recommendation to limit consumption. Listing of consumption guidelines do not imply the fish are legal to keep, MN DNR fishing regulations should be consulted. Dioxin Mercury PCBS - Polychlorinated biphenyls PFOS - Perfluorooctane sulfanate Status of the Fishery (as of 08/02/2005) Bluegills remain the most abundant species in Olson Lake. Their population is considered high when compared to similar lakes. The size structure remains small. The average length sampled was 4.5 inches. Pumpkinseed, green and hybrid sunfish were all sampled during the survey. The northern pike population was sampled at the highest level recorded for this lake. The average size was 20.8 inches and 1.89 pounds. Black crappie numbers are moderate, but the size is small. Largemouth bass were found in moderate abundance. Individuals exceeding 19 inches were found. A special regulation that requires the immediate release of all largemouth bass is inplace on Olson Lake. Walleye were sampled in average abundance for this type of lake. The average size sampled in the gill nets was 18.97 inches in length. All three species of bullhead native to Minnesota were sampled during the survey. Yellow and brown bullhead were each sampled in high abundance in the gill nets. The average weight for each species was approximately 3/4 of a pound. Yellow perch and white suckers were each found in low abundance. Lake water level report Lake name: Sunfish County: Washington Water Level Data Period of record: 01/01/1999 to 09/30/2008 # of readings: 110 Highest recorded: 896.94 ft(04/16/1999) Lowest recorded: 890.75 ft(09/30/2008) Recorded range: 6.19 ft Last reading: 890.75 ft(09/30/2008) Ordinary High Water Levell(pHW)elevation: 896.4 ft Datum:NGVD 29 (ft) Last 10 years of data, click to enlarge. Benchmarks No benchmark information available. APPENDIX B CITY OF LAKE ELMO FLOODPLAIN COMPARISON MAP =7 i- '6 Z % % — "till 16 It I ?I 17i I�i 1: M w-t o i a i i i t"-f S % % F % :Ij i e ni *00 _1 Ell Data Disclaimer: 113ilf; This map is not a boundary survey and is not intended I to be used h. The as such. City of LA.Elmo assumes no liability for the completeness of this map or responsibility for any associated direct, Indirect, 9 or consequential damages that may result from its use or misuse. Map Updated June 24, 2008 N t OIL IL lip Legend 1979 Flood Zones 2008 Flood Zones Municipal Boundary 0 800 1,600 3,200 4,800 op Feet: APPENDIX C I of 33 Permit No: MNR040000 Minnesota Pollution Control Agency GENERAL PERMIT AUTHORIZATION TO DISCHARGE STORM WATER ASSOCIATED WITH MUNICIPAL SEPARATE STORM SEWER SYSTEMS UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM/STATE DISPOSAL SYSTEM PERMIT PROGRAM EFFECTIVE DATE: .Tune 1 2006 EXPIRATION DATE: May 31,2011 In compliance with the provisions of the Clean Water Act, as amended, (33 U.S.C. 1251 et seq.; hereinafter, the "Act"), 40 Cl~R 122, 123, and 124, as amended, et sea.; Minnesota Statutes Chapters 11S and 116, as amended, and Minnesota Rules Chapter 7001, This permit establishes conditions for discharging Storm Water and. specific other related discharges to Waters of the State. This permit is required for discharges that are from Small Municipal Separate Storm Sewer Systems, as defined in this permit. 11 Upon approval by the Commissioner applicants who submit a completed application in accordance with the requirements of this permit, are authorized to discharge Storm ( Water from Small Municipal Separate Storm Server Systems, under the tenors and conditions of this.pe it. _ Signature: Sheryl A. Corrigan Issuance Date: 3 Loh Commissioner Minnesota Pollution Control Agency If You have questions on this permit, including the specific permit requirements, permit reporting or permit compliance status, please contact the appropriate Minnesota Pollution Control Agency offices. Storm Water Management Unit Storm Water Section Municipal Division Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul,MN 55155-4194 Phone(651)296-6300,or Toll free in MN 800-657-3864 Fax (65l)297-2343 2 of 33 Permit No: MNRO40000 Table of Contents P..� 1. Permit Goals........................................................................................................0.......3 II. Coverage Under This Permit.....................................................................................3 III. Application Requirements(Notice of Intent)...........................................................5 j IV. Rights and Responsibilities........................................................................................6 lV. Storm Water pollution Prevention Program...........................................................7 VI. Evaluating,Recordkeeping and Reporting..............................................................15 VII. Appendix A.: Standard Conditions...........................................................................17 VIII.Appendix S: Definitions......................................,............................................I.........20 IX, Appendix C: Limitations on Coverage....................................................................25 X. Appendix D: Nondegradation for Selected MS4s...................................................30 XI. Appendix E: Selected MS4s ......................................................................................33 f 1 I r 3 of 33 Permit No: MNR040000 PART I. PERMIT GOALS The primary goal of this permit is to restore and maintain the chemical,physical, and biological integrity of Waters of the State through management and treatment of urban Storm Water runoff. This is accomplished by management of Municipal Separate Storm Sewer Systems through a Storm Water Pollution Prevention Program. The purpose is to maintain water quality standards where there is compliance, and help bring waters that do not meet water quality standards into compliance. It should be noted that when there is a J discharge to waters where there are limitations on coverage(Part II.B),there may be more stringent requirements that must be addressed. You may also voluntarily f adopt more stringent measures to meet local goals. PART H. COVERAGE UNDER THIS PERMIT A. Eligibility This permit, including appendices,authorizes discharges of Storm Water from Small Municipal Separate Storm Sewer Systems as defined in 40 CFR§ 122.26(b)(16). B. Limitations on Coverage 1. This permit does not authorize discharges other than Storm Water. Non- Storm Water discharges may include: combined sewer overflow,noncontact cooling water, sewage,wash water, scrubber water, spills,-oil,hazardous substances, fill, commercial equipment/vehicle cleaning and maintenance wastewaters. A separate National Pollutant Discharge Elimination System (NPDES)permit may be required for these discharges. 1 2. This permit does not authorize the discharge of Storm Water when a separate 4 NPDES permit is required for these activities. For example,while Storm. 4 Water from industrial activity or construction activity may be discharged from a MS4 with authorized Storm Water discharges,this permit does not ( replace or satisfy any other permits required for those discharges. ( 3. This permit does not authorize the discharge of Storm Water from any other entity located in the drainage area or outside the drainage area. Only your system and the portions of the storm sewer system that are under your operational control are authorized by your permit. 4. This permit does not authorize the following discharges as described in Appendix C unless the requirements of Part IX (Appendix C)are met: a. Discharges to waters with Prohibited Discharges as defined in Minn. R. 7050.0180,subp. 3,4, and 5. l 4 of33 Permit No: MNRo40000 b. Discharges to waters with Restricted Discharge as defined in Minn. R. 7050.0180, subp. 6, 6a, and 6b. c, Discharges to Trout Waters as defined in Minn. R. 6264.0050,subp. 2 and 4. d. Discharges to Wetlands as defined in Minn. R. 7050.0130, subp. F(see l_ also Minn.R. 7050.0186). r C. Discharges requiring Environmental Review required by Minn. Stat. ch. .. 116D and 42 U.S.C. §§ 4321 —4370 f, r f. Discharges Affecting Threatened or Endangered.Species or Their - Habitat. r g. Discharges Affecting Historic or Archeological Sites. h, Discharges Affecting Source Water Protection Areas. r 5. This permit does not allow discharges if the requirements of fart X (Appendix D) and schedule of Part XI(Appendix E) are applicable,unless the M84 is in compliance with those appendices. l._ C. Obtaining Authorization { In order for Storm Water discharges from Small Municipal Separate Storm Sewer Systems to be authorized to discharge under this General Permit; � 1, Submit an application with the Storm Water Pollution Prevention Program You intend to implement under this permit,in accordance with the requirements of Part III, using a form provided by the Commissioner(or a facsimile thereof). 2. Where the ownership or significant operational control of the MS4 changes, after the submittal of an application under Part 111, a new application must be submitted in accordance with Part III. 3, The Commissioner will review the application and Storm Water Pollution Prevention Program for completeness and compliance with this permit. The Commissioner shall determine whether to approve coverage or to deny (` coverage to dischargers who submit a complete application. In accordance with the procedures of this permit and requirements of Minn, R, ch. 7001, the Commissioner shall provide public notice with the opportunity for hearing on C the determination, Upon approval by-the Commissioner,dischargers are authorized to discharge Storm Water from Small Municipal Separate Storm Sewer Systems under the terms and conditions of this permit. f L S of 33 Permit No: MNR040000 4. The Commissioner may deny coverage under this permit and require submittal of an application for an individual NPDES permit based on a review of the application or other information, in accordance with Minn. R. ch. 7000 and 7001. PART I11. APPLICATION REQUIRE,MENTS (Notice of Intent) A. Deadlines for Application If You are an Owner or Operator of a Small Municipal Separate Storm Sewer System regulated under 40 CFR § 122.32(a)(1),You must apply to obtain coverage under this permit within 90 days after'the permit issuance date on page 1 of this permit. 1f You fail to make the application deadline,You are out of compliance and must submit an application. The Owner or Operator of an M84 that is not designated for coverage by federal rules,but has been designated under Minn. R. ch. 7090,must apply by the date specified in the Coin mission erIs designation documents. f ' i f B. Signature The Application shall be signed in accordance with application forms provided by the Commissioner and shall include the following information; 1. The street address, county, and the Owner or Person with operational control j of the MS4 for which the notification is submitted; and 2. The name,address, and telephone number of the individual responsible for overall permit compliance. C. Application Attachment: Storm Water Pollution Prevention. Program The proposed Storm Water Pollution Prevention Program for implementing the permit shall be attached to the application on forms provided by the Commissioner (or reasonable facsimiles), including: 1. The Best Management Practices or BMPs that You will implement for each of the Storm Water minimum control measures at Part V.G of this permit; 2. The measurable goals for each of the BMPs,including, as appropriate,the months and years in which You will undertake required actions,including interim milestones and the frequency of the action, in narrative or numeric form, as appropriate; 3. Estimated timeline(s) (months,years)in which You will implement each h BMP; and I . 1 6 of33 Permit No: MNR040000 4. fndividual(s) responsible for implementing and/or coordinating each component of the Storm Water Pollution Prevention Program, This should be the individual You want the Agency to contact for the particular [ component; it may be the overall coordinator or other individual, D. Where to Subunit �. i Applications signed in accordance with Part III.B of this permit, Storm Water Pollution Prevention Programs submitted under fart III.C, annual reports under f Part VI,D, and submittals under Appendices C,D, and E, are to be submitted to the Commissioner at the following address: F Storm Water Management Unit Storm Water Section Municipal Division r Minnesota Pollution Control Agency t 520 Lafayette Road North St. Paul,MN 55155-4194 Phone(651)296-6300, or t , Toll free in MN 800-657-3864 Pax(651) 297-2343 - E. Record Retention F The applicant shall retain copies of the permit application, the Storm 'Water L Pollution Prevention Program, all data and information used by the applicant to complete the application, and any information developed as a requirement of this permit or as requested b the Commissioner, for period of at least three 3 p 9 Y p ( )years beyond the date of permit expiration. This period is automatically extended during the course of an unresolved enforcement action regarding the MS4 or as requested I by the Commissioner, PART IV. RIGHTS AND RESPONSIBILITIES A. The Commissioner may modify this permit or issue other permits, in accordance with Minn. 1L ch. 7001,to include more stringent effluent limitations or permit requirements that:modify or are in addition to the minimum control measures in Part V.G of this permit, or both. These modifications may be based on the Commissioner's determination that such modifications are needed to protect water quality. B. Additional MS4s may be designated for coverage under this permit in accordance with Minn. R.ch. 7090. The Owner or Operator of an MS4 that is designated for 1. coverage must comply with the permit requirements by the dates specified in the Commissioner's designation documents. 7 of 33 Permit No: MNRO40000 C. You may request individual permits based on Minn. R. ch. 7000,7001, and other f applicable rules. D. Section 303(d)listings and Total Maximum Daily Load(TMDL) If your MS4 discharges to a Water of the State that appears on the current USEPA. approved list of impaired waters under Section 303(d)of the Clean Water Act(33 U.S.C. § 303 (d)),You must review whether changes may be warranted in your Storm Water Pollution Prevention Program to Reduce the impact of your discharge, If a USEPA-approved TMDL(s)has been developed, You must review the adequacy of your Storm Water Pollution Prevention Program to meet the TMDL's Waste Load Allocation set for Storm Water sources. If the Storm Water Pollution Prevention Program is not meeting the applicable requirements, schedules and objectives of the TMDL,You must modify your Storm Water Pollution Prevention Program, as appropriate, within 18 months after the TMDL Waste Load Allocation is approved. PART V. STORM WATER POLLUTION PREVENTION PROGRAM A. You must develop,implement, and enforce a Storm Water Pollution Prevention Program designed to Reduce the discharge of pollutants from your Small MS4, to protect water quality, and to satisfy the appropriate water duality requirements of the Clean Water Act. Upon approval by the Commissioner, the Storm Water Pollution Prevention Program shall be implemented as specified in the permit or in the Commissioner's approval letter. B. Your Storm Water Pollution Prevention Program must be designed and managed to Reduce the discharge of pollutants from your storm sewer system to the Maximum Extent Practicable (MEP). You must manage your municipal r storm sewer system in compliance with the Clean Water Act and with the terms and conditions of this permit. You must manage, operate, and maintain the storm sewer system and areas You control that discharge to the storm sewer system in a manner to Reduce the discharge of pollutants to the MEP. The Storm Water Pollution' Prevention Program will consist of a combination of Best Management Practices, including education, maintenance, control techniques,system design and engineering methods,and such other provisions as You determined to be appropriate, as long as the BMPs meet the requirements of this permit. C. You shall submit an annual report on the implementation'of the Storm Water Pollution Prevention Program by June 3.0 of each year,or on another later date if ` established for your MS4 by the Commissioner. The report shall cover the entire previous calendar year, in accordance with the reporting requirements of Part VI.D. D. Your Storm Water Pollution Prevention Program must include BMPs that control or Reduce pollutants, as appropriate for your community. In the y" development of BMPs for your Storm Water Pollution Prevention Program, 1 8of33 Permit No; MNR040000 You must consider the sources of pollutants, the potentially polluting activities it being conducted in the watershed, and the sensitivity of the receiving waters. For MS4s that have discharges to waters listed in Part 11.13.4, see Part 1X(Appendix C) for additional requirements. For MS4s listed in Part XI(Appendix E), see Part X (Appendix D) for additional requirements. E. For each minimum control treasure, there shall be a description of the BMPs for this measure,responsible department in charge, an implementation schedule, including any request by You for consideration by the Commissioner of an extension or exemption from any deadlines and timelines set forth in this permit, and measurable goals that will be used to determine the success or benefits of the BMPs. F. The Storm Water Pollution Prevention Program shall become an enforceable part of this permit upon approval by the Commissioner, Modifications to the r Storm Water Pollutions Prevention Program that are required or allowed by this permit(see Part V.H) shall also become enforceable provisions. G. The six minimum control pleasures to be included in your Storm Water Pollution Prevention Program are listed below. You must define appropriate BMPs for these minimum control measures and measurable goals for each BMP. The Storm �. Water Pollution Prevention Program must include all BMPs required below, must include annual schedules or procedures for implementation, and,where ` appropriate,must be implemented or established in ordinance,plan or policy by Tune 30, 2010,unless other timelines have been specifically established in this permit Part V.G.1-6,or by the Commissioner under Part 1V.B, or under other rules and authorities, r, I, Public education and outreach on Storm Water impacts. You must select and implement a program of appropriate BMPs and measurable goals for this minimum control measure consisting of, at minimum: Il a. You must implement a public education program to distribute educational materials to the community or conduct equivalent outreach activities about the impacts of Storm Water discharges on water bodies and the steps that the public can take to Reduce pollutants in Storm Water runoff l b. You must specifically implement an education program that individually addresses each minimum control measure (Part V.G.1-6): I) Public education and outreach; 2) Public participation; 3) Illicit discharge detection and elimination; << 4) Construction site Storm Water runoff control; 9 of 33 Permit No: MNR040000 5) Post-construction Storm Water management in New Development and Redevelopment; and 6) Pollution prevention/good housekeeping for municipal operations. C. For each control measure,your education program must identify: 1) The audience or audiences involved; 2) Educational goals for each audience in terms of increased I awareness; increased understanding, acquired skills,and/or desired I changes in behavior; 3) Activities used to reach educational goals for each audience; 4) Activity implementation plans, including responsible department in charge, entities responsible for given activities, and schedules; and 5) Available perfonnance measures that can be used to determine success in reaching educational goals. { d. You must describe how your education program is coordinated with and f makes effective use of other Storm Water education programs being conducted in your area by other entities as appropriate for your MS4, including,but not limited to: community groups, nonprofit organizations, lake conservation districts, soil and water conservation districts,watershed districts, watershed management organizations, school districts, University of Minnesota Extension, and county, regional,state, and federal government. e. You must hold at least one public meeting per year addressing the Storm Water Pollution Prevention Program. You must hold the public meeting prior to submittal to the Commissioner of the annual report required in Part VI.D. 1) Location. The public informational meeting must be held in the general vicinity of the MS4 that is the subject of the permit. Otherwise;the public informational meeting must be held in a place that is generally convenient to Persons expected to attend the meeting. 2) Notice. You must issue a notice of the public informational meeting at least 30 days prior to the meeting. The notice must contain a reference to the Storm Water Pollution Prevention Program, the date, time, and location of the public informational meeting; a concise description of the manner in which the public infonnational meeting will be conducted; and shall indicate the f location where a copy of the Storm Water Pollution Prevention f Program is available for public review. 3) Distribution of notice. You must publish the notice in a Newspaper of general circulation in the general vicinity of the 1 f 10of33 Permit No: MNR040000 MS4, and shall make available a copy of the notice to the Agency, the appropriate city and county officials, and all other Persons who have requested that they be informed of public meetings for . the Storm Water Pollution Prevention Program, Z. 4) foint meetings. You may consolidate two or more matters, issues, or related groups of issues,or hold joint MS4 public meetings with other permittees to meet the requirements of this part. These public meetings may be part of a larger public meeting, such as a F city council meeting,provided that adequate public notice and opportunity to participate is provided. 2. Public participation/involvement, You must select and implement a program of appropriate BMPs and measurable goals for this minimum control measure consisting of, at minimum: { a. You must comply with applicable public notice requirements of fart V.G.l.e.2 when implementing the provisions of the Storm Water r' Pollution Prevention Program. b. You must solicit public input and opinion on the adequacy of the Storm f. Water Pollution Prevention Program, including input from the public meeting, described in Part V.G.Le, each year prior to submittal of the annual report to the Commissioner,which is described in Part VID. f 1) You must afford interested Persons a reasonable opportunity to make oral statements concerning the Storm Water Pollution Prevention Program. 2) You must consider timely,relevant written materials that interested Persons submit concerning the Storm Water Pollution Prevention Program. 3) You may establish procedures and processes for each speaker's t; presentation, require speakers with similar views to select a spokesperson, specify the timing and format of written materials, € or make similar rules to help ensure an opportunity for full and fair consideration of all views. r C. You must consider the public input, oral and written,to the Storm Water Pollution Prevention Program and shall make adjustments You find appropriate. L 3. Illicit discharge detection and elimination. You must develop, implement, and enforce a program to detect and eliminate illicit discharges as defined at 40 CFR § 122.26(b)(2)into your Small MS4. You must also select and .. implement a program of appropriate BMPs and measurable goals for this minimum control measure consisting of, at minimum.; f I 13 of 33 Permit No: MNR040000 a. You must develop, if not already completed, a storm sewer system map by June 30, 2008, or on another date established by the Commissioner, showing the location of: 1) Ponds, streams, lakes and Wetlands that are part of your system; . 2) Structural pollution control devices(grit chambers, separators, etc.) that are part of your system; 1 3) All pipes and conveyances in your system as a goal,but at minimum,those pipes that are 24 inches in diameter and over; and 4) Outfalls, including discharges from your system to other MS4s, or waters and Wetlands that are not part of your system (where You do not have operational control);structures that discharge storm water directly into groundwater; overland discharge points and all other points of discharge from your system that are outlets,but not ( diffuse flow areas. 4 b. You must,to the extent allowable under law, effectively prohibit, j through ordinance or Other Regulatory Mechanism, non-Storm Water discharges into your storm sewer system and implement appropriate enforcement procedures and actions. C. You must develop and implement a program to detect and address non- Storm Water discharges,including illegal dumping, to your system. d. You must inform employees,businesses, and the general public in your MS4 area of hazards associated with illegal discharges and improper disposal of waste. l ; e. You must address the following categories of non-Storm Water discharges or flows (i.e.,illicit discharges),only if You identify theta as significant contributors of pollutants to your Small M84: water line flushing, landscape irrigation, diverted stream flows,rising ground waters,uncontaminated ground water infiltration(as defined at + 40 CFR § 35.2005(b)(20)),uncontaminated pumped ground water, discharges from potable water sources, foundation drains, air conditioning condensation, irrigation water,springs,water from crawl space pumps, footing drains, lawn watering, individual residential car washing,flows from riparian habitats and Wetlands, dechlorinated f swimming pool discharges, and street wash water, discharges or flows f from fire fighting activities. 4. Construction site Storm Water runoff control. Within six months after extension of coverage under this permit,You must have developed and must have commenced to implement and enforce a program to Reduce pollutants in any Storm Water runoff to your Small MS4 from construction activities f l 1: 12 of 33 t Permit No: MNR040000 t within your jurisdiction that result in a land disturbance of greater than or . equal to one acre. Controls on Storm Water discharges from construction activity disturbing less than one acre must be included in your program, if that construction activity is part of a larger Common Plan of Development or Sale that would disturb one acre or more. You must also select and implement a program of appropriate BMPs and measurable goals for this . minimum control measure consisting of,at minimum: a. An ordinance or Other Regulatory Mechanism to require erosion and sediment controls, as well as sanctions to ensure compliance, to the 4, extent allowable under law; r b. Requirements for construction site operators to implement appropriate L erosion and sediment control Best Management Practices; C. Requirements for construction site operators to control waste, such as discarded building materials, concrete truck washout, chemicals, litter, and sanitary waste at the construction site that may cause adverse f< impacts to water quality; d. Procedures for site plan review which incorporate consideration of potential water quality impacts; l_ e. Procedures for receipt and consideration of reports of noncompliance or f- other information on construction related issues submitted by the public; and r f. Procedures for site inspection and enforcement of control measures. S. Post-construction Storm Water management in New Development and r Redevelopment. You must develop, implement, and enforce a program to address Storm "Water runoff from New Development and Redevelopment 4` projects within your jurisdiction that disturb greater than or equal to one acre, r including projects less than one acre that are part of a larger Common Plan of j Development or Sale that discharge into your Small MS4 by June 30,2008, or on another date established by the Commissioner, Your program must ensure that controls are in place that would prevent or Reduce water qualityf impacts. You must also select and implement a program of appropriate �= BMPs and measurable goals for this minimum control measure consisting of, at minimum: l- a. Develop and implement strategies which include a combination of structural and/or non-structural BMPs appropriate for your community; 7 i 13 of 33 Permit No: MNR040000 b. Use an ordinance or Other Regulatory Mechanism to address post- construction runoff from New Development and Redevelopment projects to the extent allowable under law; and f C. Ensure adequate long-term operation and maintenance of BMPs installed as a result of these requirements. 6. Pollution prevention/good housekeeping for municipal operations. You must select and implement a program of appropriate BMPs and measurable goals for this minimum control measure consisting of,at minimum: a, An operation and maintenance program that includes a training component and has the ultimate goal of preventing or Reducing pollutant runoff from MS4 operations. Training materials that are available fi-om the USE PA,state and regional agencies, or other organizations may be used as appropriate or modified for your community. Your program must include employee training to prevent { and Reduce Storm Water pollution from activities such as park and open space maintenance, fleet and building maintenance,new construction and land disturbances, and Storm Water system maintenance. b. You must also: t 1) Operate and maintain your Storm Water system in a manner so as to Reduce the discharge of pollutants to the Maximum Extent J Practicable. 2) Inspect annually all structural pollution control devices,such as trap manholes, grit chambers,sumps, floatable skimmers and traps, separators, and other small settling or filtering devices. 3) . Inspect, at minimum, 20%of the MS4*Outfalls, sediment basins and ponds each year on a rotating basis,during the effective period of this permit. 4) Inspect all exposed stockpile, storage and material handling areas at least annually. 5) Based on your inspection,determine if repair,replacement, or maintenance measures are necessary for proper operation and to prevent environmental impacts such as erosion. The necessary measures shall be completed as soon as possible,usually during the same year as the inspection. When this is not practicable, the reasons and a schedule for completion shall be submitted in the annual report. 6) Summarize the results of all inspections in the annual report. Keep records on the dates of inspection and responses to the inspections, including the date of completion of repairs and major additional iprotection measures. 14 of 33 Permit No: MNR040000 7 Kee records of inspection results including as appropriate,p p gthe date, antecedent weather conditions, sediment storage and capacity remaining, and any maintenance performed or recommended. f` After two years of inspections,if patterns of maintenance become - apparent, the frequency of inspections may be adjusted. If maintenance or sediment removal is required as a result of each of the first two annual inspections,the frequency of inspection shall be increased to at least two(2) times annually, or more frequently as needed to prevent carry-over or washout of pollutants from the structures and maximize pollutant removal. If maintenance or sediment removal is not required as a result of both of the first two (2)annual inspections, the frequency may be reduced to once every two(2)years. , H. Modifications to the Storm Water Pollution Prevention Program 1. The Commissioner may require You to modify the Storm Water Pollution Prevention Program as needed, in accordance with the procedures of Minn. r R. ch. 7001, and may consider the following factors: a. Discharges from the storm sewer system are impacting the quality of t receiving waters; r _ b. More stringent requirements are necessary to comply with state or r federal regulations; 1.. c. Measures are necessary to meet the applicable requirements of r Appendices C and D, or d. Additional conditions are deemed necessary to comply with the goals and requirements of the Clean Water Act or water quality standards, 2. Modifications that You wish to make in your Storm Water Pollution Prevention Program, other than modifications allowed in Part Id.3 below, must be approved by the Commissioner in accordance with the procedures of Minn. R. ch. 7001. All requests must be in writing, setting forth schedules for compliance. The request should discuss alternative program modifications, f assure compliance with requirements of the permit, and meet other requirements of the permit and applicable laws.. f- 3. The Storm Water Pollution Prevention Program may only be modified by You without prior approval of the Commissioner,provided it is in accordance with the following: r' a. A BMP is added, and none subtracted, from the Storm Water Pollution Prevention Program; or 4 i 15 of 33 Permit No; MNR040000 b. A less effective BMP identified in the Storm Water Pollution Prevention Program is replaced with a more effective BMP. The alternate BMP shall address the same, or similar,concerns as the ineffective or failed BMP; and C. The Commissioner is notified of the modification in the annual report for the year the modification is made. PART VI. EVALUATING, RECORDKEEPI<NG AND REPORTING A. Evaluation and Assessment For each annual report, You must evaluate program compliance,the appropriateness of your identified Best Management Practices,and progress towards achieving your identified measurable goals. B. Recordkeeping jYou must keep records required by the NPDES permit for at least three(3)years beyond the term of the permit. You must submit your records to the Commissioner only if { specifically asked to do so. i C. Public Availability You must make your records, including your Storm Water Pollution Prevention Program,available to the public at reasonable times during regular business hours (see 40 CFR-,§ 122.7 for confidentiality provision). You may assess a reasonable charge for copying. You may require a member of the public to provide advance notice. D. Annual Reporting submit annual reports to the MPCA b June 30 of each year. There ort must You must p Y Y p cover the entire previous calendar year. Your annual report must summarize: I. The status of compliance with permit conditions, including an assessment of the appropriateness of your identified Best Management Practices and progress towards achieving your identified measurable goals for each of the minimum control measures. Your assessment must be based on results of information collected and analyzed, including monitoring(if any), inspection findings, and public input received during the reporting period; 2. The Storm Water activities You plan to undertake during the next reporting cycle; 3. A change in any identified Best Management Practices or measurable goals for any of the minimum control measures; and 4 I 16 of 33 Permit No: MNR040000 4. A statement that You are relying on another entity to satisfy some of your permit obligations(if applicable),and what agreements You have entered into in support of this effort. E. Reporting Submittals The applications,annual reports,Storm Water Pollution Prevention Program,and �.. other submittals required by this permit shall be submitted to: Storm Water Management Unit Storm Water Section Municipal Division r Minnesota Pollution Control Agency 520 Lafayette Road North St.Paul,MN 55155-4194 E: t , 1.., s_ r r i l 17of33 Permit No: MNR040000 1 PART VII. APPENDIX A: STANDARD CONDITIONS A. The Agency's issuance of a permit does not release the permittee from any liability, penalty,or duty imposed by Minnesota or federal statutes or rules or local ordinances, except the obligation to obtain the permit. B. The Agency's issuance of a permit does not prevent the future adoption by the Agency of pollution control rules,standards,or orders more stringent than those now in existence and does not prevent the enforcement of these rules, standards, or orders against the permittee. C. The permit does not convey a property right or an exclusive privilege. D. The Agency's issuance of a permit does not obligate the Agency to enforce local laws, rules, or plans beyond that authorized by Minnesota statutes. E. The permittee shall perform the actions or conduct the activity authorized by the 1 permit in accordance with the plans and specifications approved by the Agency and 1 in compliance with the conditions of the permit. F. The permittee shall at all times properly operate and maintain the facilities and systems of treatment and control and the appurtenances related to them.which are installed or used by the permittee to achieve compliance with the conditions of the permit. Proper operation and maintenance includes effective performance, adequate funding, adequate operator staffing and training, and adequate laboratory and process controls, including appropriate quality assurance procedures. The permittee shall install and maintain appropriate backup or auxiliary facilities if they are j necessary to achieve compliance with the conditions of the permit and, for all permits other than hazardous waste facility permits, if these backup or auxiliary facilities are technically and economically feasible. G. The permittee may not knowingly make a false or misleading statement, representation, or•certification in a record,report,plan,or other document required to be submitted to the Agency or to the Commissioner by the permit. The permittee shall immediately upon discovery report to the Commissioner an error or omission in these records,reports,plans,or other documents. H. The permittee shall,when requested by the Commissioner, submit within a reasonable time the information and reports that are relevant to the control of pollution regarding the construction, modification,or operation of the facility covered by the permit or regarding the conduct of the activity covered by the permit. I. When authorized by Minn. Stat. §§ 115.04; 11513.17, subd. 4; and 116.091,and upon presentation of proper credentials,the Agency,or an authorized employee or agent of the Agency, shall be allowed by the permittee to enter at reasonable times 18 of 33 Permit No: MNR040000 upon the property of the permittee to examine and copy books,papers, records, or memoranda pertaining to the construction,modification, or operation of the facility covered by the permit or pertaining to the activity covered by the permit; and to conduct surveys and investigations, including sampling or monitoring, pertaining to L the construction,modification, or operation of the facility covered by the permit or pertaining to the activity covered by the permit. J. If the permittee discovers, through any means, including notification by the Agency, that noncompliance with a condition of the permit has occurred,the permittee shall take all reasonable steps to minimize the adverse impacts on human health, public drinking water supplies, or the environment resulting from the noncompliance. K. If the permittee discovers that noncompliance with a condition of the permit has occurred which could endanger human health,public drinking water supplies,or the environment,the permittee shall,within 24 hours of the discovery of the noncompliance,orally notify the Commissioner. Within five days of the discovery of the noncompliance, the permittee shall submit to the Commissioner a written description of the noncompliance; the cause of the noncompliance; the exact dates I of the period of the noncompliance; if the noncompliance has not been corrected, the anticipated time it is expected to continue; and steps taken or planned to reduce, f. eliminate,and prevent reoccurrence of the noncompliance. L. The per-rmittec shall report noncompliance with the permit not reported under item K as a part of the next report,which the permittee is required to submit under this permit. If no reports are required within 30 days of the discovery of the noncompliance,the permittee shall submit the information listed in item K within r 30 days of the discovery of the noncompliance. M. The permittee shall give advance notice to the Commissioner as soon as possible of planned physical alterations or additions to the permitted facility(MSA) or activity that may result in noncompliance with a Minnesota or federal pollution control statute or rule or a condition of the permit. N. The permit is not transferable to any Person without the express written approval of the Agency after compliance with the requirements of Minn. R. 7001 A 190, A Person to whom,the pennit has been transferred shall comply with the conditions of the permit. O. The permit authorizes the permittee to perform the activities described in the permit under the conditions of the permit. In issuing the permit, the state and Agency assume no responsibility for darnage to Persons,property, or the environment caused by the activities of the permittee in the conduct of its actions, including those activities authorized, directed, or undertaken under the permit. To the extent the state and Agency may be liable for the activities of its employees,that liability is explicitly limited to that provided in the Tort Claims Act, Minn. Stat. § 3,736. r 19 of 33 Permit No: MNR040000 P. This permit incorporates by reference the applicable portions of 40 CFR§§ 122.41 and 122.42 parts(c)and (d)and Minn. R. 7001,1090, which are enforceable pants of this permit. I � I, I 1 i , I 20 of 33 Permit No: MNR040000 PART VIII;. APPENDIX B: DEFINITIONS The definitions in this Part are for purposes of this permit only. F "Agency"or"Agency members" means the Commissioner and the eight persons appointed to the Minnesota Pollution Control Agency,pursuant to Minn.. Stat. § 116.02, subd. 1. "Best Management Practices"or"BMPs"means practices to prevent or Reduce the pollution of the Waters of the State, including schedules of activities,prohibitions of I_ practices,and other management practices,and also includes treatment requirements, operating procedures and practices to control plant site runoff, spillage or leaks,sludge, { or waste disposal or drainage from raw material storage. "Commissioner"means the Commissioner of the Minnesota Pollution Control Agency �- or the Commissioner's designee. "Common Plan Of Development Or Sale" means a contiguous area where multiple separate and distinct construction activities are planned to occur at different times on different schedules under one plan,for example, a housing development of five one- t- quarter-acre lots(40 CFR§ 122.26(b)(I5)(i)). "Designated MS4" means an MS4 designated in accordance with Minn.R. ch. 7090. L "EPA" means the U.S. Enviromrrental Protection Agency. "Expanded Discharge"means a discharge that changes in volume,quality,location,or any other manner after January 1, 1988 or the effective date an outstanding resource { value water was designated as described in Minn. R. 7050.0460 and 77050.0470, such that � an increased loading of one or more pollutants results. In determining whether an increased loading of.one or more pollutants would result froth the proposed change in the discharge, the Agency shall compare the loading that would result from the proposed discharge with the loading allowed by the Agency as of January 1, 1988 or the effective date of outstanding resource value water designation. This definition does not apply to the discharge of bioaccumulative chemicals of concern, as defined in Minn. R. �= 7052.0010,subp. 4, to outstanding resource value waters in the Lake Superior Basin. For purposes of Minn.R.7050.0180, an expanded discharge of a bioaccumulative chemical of concern to an outstanding resource value water in the Lake Superior Basin is defined in Minn. R. 7052.0010, subp. 18. { "General Permit"means a permit issued under Minn. R. 7001,0210 to a category of I_ perrnittees whose operations,emissions, activities,discharges, or facilities are the same or substantially similar. "Maximum Extent Practicable""MEP" is the statutory standard(33 U.S.C. § 1342(p)(3)(B)(iii))that establishes the level of pollutant reductions that an Owner or r 21 of33 Permit No; MNR040000 Operator of Regulated MS4s must achieve. The USEPA has intentionally not provided a precise definition of MEP to allow maximum flexibility in MS4 permitting. The pollutant reductions that represent MCP may be different for each Small MS4,given the unique local hydrologic and geologic concerns that may exist and the differing possible pollutant control strategies. Therefore, each permittee will determine appropriate I3MPs to satisfy each of the six minimum control measures through an evaluative process, The USEPA envisions application of the MCP standard as an iterative process. "MPCA"means the Minnesota Pollution Control Agency. "MS4"means a Municipal Separate Storm Sewer System. "Municipal Separate Storm Sewer System"means a conveyance orsste Y y system of conveyances(including roads with drainage systems,municipal streets,catch basins, curbs,gutters,ditches,man-made channels, or storm drains): 1. Owned or operated by a state, city,town, borough, county,parish,district, association, or other public body(created by or pursuant to state law)having 1 jurisdiction over disposal of sewage, industrial wastes, Storm Water, or other wastes, including special districts under state law such as a sewer district, I flood control district or drainage district, or similar entity, or an Indian tribe or an authorized Indian tribal organization, or a designated and approved management Agency under section 208 of the CWA(33 U.S.C. § 1288) that discharges to waters of the United States; 2. Designed or used for collecting or conveying Storm Water; 3. Which is not a combined sewer; and 4. Which is not part of a Publicly Owned Treatment Works(POTW)as defined at 40 CFR§ 122.2. "New Development"means construction activities that create new impervious surface. i "New Discharge" For all waters that are not outstanding resource value waters New Discharge means a discharge that was not in existence before January 1, 1988. For f outstanding resource value waters New Discharge means a discharge that was not in existence on the effective date the outstanding resource value water was designated as described in Minn. R. 7050.0460 and 7050.0470. "Newspaper"means a publication containing news of general interest in the vicinity of the MS4. It can include other publications if the distribution includes the general population of potentially interested parties. "Notice of Intent" as referenced in the USEPA documents is synonymous with the term "permit application"for the purposes of this permit. I 22 of 33 Permit No: MNR040000 "Other Regulatory Mechanism"means any legally enforceable document, such as a contract or other agreement that has penalties such as withholding payments, fines or other pleasures to prevent non compliance. "Operator"means the Person with primary operational control and legal responsibility for the Municipal Separate Storm Seaver System. "Outfall"means the point source where a Municipal Separate Storm Sewer System discharges from a pipe, ditch,or other discrete conveyance to receiving waters, or to ` other Municipal Separate Storm Sewer Systems. It does not include diffuse runoff or !. conveyances which connect segments of the same stream or water systems. "Owner"means the Person that owns the Municipal Separate Storm Sewer System. "Person"means the state or any agency or institution thereof, any municipality, governmental subdivision,public or private corporation,individual,partnership, or other entity, including,but not limited to, association, commission or any interstate body,and includes any officer or governing or managing body of any municipality,governmental r subdivision, or public or private corporation, or other entity. "Physical Alteration"except as used in Part VII.M, means the dredging,filling, { draining,or permanent inundating of a Wetland, Restoring a degraded Wetland by reestablishing its hydrology is not a Physical Alteration. "Rebuttable Presumption"is a presumption that may be rebutted by the evidence. "Record of Decision"means a record of the comments and the permittee's response to comments where such record is required in this permit. L "Redevelopment"refers to alterations of a property that change the"footprint"of site or building in such a way that results in the disturbance of equal to or greater than one(1) acre of land. The term is not intended to include such activities as exterior remodeling, which would not be expected to cause adverse Storm Water quality impacts and offer no . new opportunity for Storm Water controls. "Reduce" means Reduce to the"Maximum Extent Practicable"unless otherwise defined in the context in which it is used. "Regulated MS4" paeans an MS4 that is regulated pursuant to 40 CPR § 122.32(a)(1), or an M84s that is designated for coverage by the Commissioner. r "Selected MS4" means MS4s listed in Part XI (Appendix E). F "Small Municipal Separate Storm Sewer System" means all separate storm sewers . that are: r 1 lu 1 23 of 33 Permit No: MNR040000 l. Owned or operated by the United States, a state,city,town, borough,county, parish, district, association, or other public body(created by or pursuant to state laver)having jurisdiction over disposal of sewage, industrial wastes, Storm Water, or other wastes,including special districts under state law such as a sewer district, flood control district or drainage district,or similar entity, or an Indian tribe or an authorized Indian tribal organization, or a designated and approved management agency under section 208 of the CWA that discharges to waters of the United States. 2. Not defined as "large"or"medium"Municipal Separate Storm Sewer Systems pursuant to 40 CFR §122.26 paragraphs (b)(4)and (b)(7) or designated under paragraph(a)(1)(v). 3. This term includes systems similar to separate storm sewer systems in municipalities, such as systems at military bases, large hospital or prison complexes,and highways and other thoroughfares. The term does not include separate storm sewers in very discrete areas,such as individual buildings. "Small MS4"means a Small Municipal Separate Storm Sever System. "Storm Water"means Storm Water runoff, snowmelt runoff,surface runoff and l drainage. "Storm Water Pollution Prevention Program"or"SWPPP" is a compilation of i RMPs to address the six minimum control measures and other provisions of the MS4 permit,that is designed and managed to Reduce the discharge of pollutants from your MS4 to the Maximum Extent Practicable as appropriate to your community. "Total Maximum Daily Load"or"TMDL"is the process established by the USEP.A for the allocation of pollutant loads, including Storm Water, to a particular water body or reach of a water body. "USEPA" or"EPA"means the U.S. Environmental Protection Agency. "Waters of the State),means all streams,lakes,ponds,marshes,watercourses, waterways, wells,springs,reservoirs, aquifers, irrigation systems,drainage systems and all other bodies or accumulations of water, surface or underground,natural or artificial, public or private, which are contained within, flow through, or border upon the state or any portion thereof. "Wetlands"are those areas that are inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps,marshes,bogs, and similar areas, Constructed Wetlands designed for wastewater treatment are not Waters of the State. Wetlands must have the following attributes: i i 24 of 33 Permit No: MNR040000 1. .A predominance of hydric soils; i 2. Inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support a prevalence of hydrophytic vegetation typically - adapted for life in a saturated soil condition; and 3. Under normal circumstances support a prevalence of such vegetation. "Yon"means the Owner, Operator or permittee as appropriate. � f' L: r - t:. r 3 L 25 of 33 Permit No: MNRO40000 PART IX. APPENDIX C: LIMITATIONS ON COVERAGE fContents of Appendix C: z A. Discharges to Waters With Prohibited Discharges(pages 25-26) B. Discharges to Waters With.Restricted Discharges(pages 26-28) C. Discharges to Trout Waters(page 28) D. Discharges to Wetlands(page 28) E. Discharges.Requiring Environ»rental Review 28(page ) .i. Discharges Affecting Threatened or,Endangered Species or Their Habitat(page 29) G. Discharges Affecting Historic or Archeological Sites (page 29) l H. Discharges Affecting Source Water Protection Areas (page 29) l This part describes more stringent requirements for discharges that meet the following specified criteria,A through H. Whenever two or more requirements,restrictions, or prohibitions apply,both or all must be met. Whenever two or more requirements, restrictions or prohibitions conflict, the more restrictive conditions must be met. A. Discharges to Waters with Prohibited Discharges (Minn. R, 7050.0180, subp, 3, 4 and 5). This permit does not authorize New or Expanded Discharges to waters, or discharges adversely impacting waters, where the applicable water quality standards prohibit New or Expanded Discharges as described in Minn. R. 7050.0180,subp. 3, 4,and 5 unless the following requirements are met: 1. List. You must identify as part of your application for permit the Waters with Prohibited Discharges to which your MS4 discharges. The list must be included with your application, to be submitted within 90 days after the permit effective date on page 1 of this permit or for Designated MS4s in accordance with Part IV.B. 2. Map. You must mark on U.S.G.S. watershed or topographic maps of 1:24,000 scale or better at minimum the DNR minor subwatersheds in your jurisdiction that discharge in whole or in part to Waters with Prohibited Discharges. You must provide a narrative estimate of the percent impervious surface based on current land use, the percent expected future impervious surface based on zoning or comprehensive plans, and other information that may significantly affect your runoff to the listed waters. The map must be included with your application, to be submitted within 90 days after the permit 1 26 0f 33 Permit No: MNR040000 effective date on page l of this permit or for Designated MS4s in accordance with fart IV.B. 3. Assessment. You must then assess how your Storm Water Pollution Prevention Program can be reasonably modified to eliminate New or Expanded Discharges to Waters with Prohibited Discharges. This ( ' assessment must be developed for New or Expanded Discharges created 1_ from 1988 until the year 2020. You must present this assessment, together with your proposed changes to your Storm Water Pollution Prevention Program, for public comment during the annual public comment period L required in the permit,prior to your first annual report(see Part VI.D) or prior to the schedule in Appendix E for Selected MS4s. L 4. Assessment Submittal. You must submit the assessment from fart IX.A.3 above, including your response to any public comments and proposed changes l; to your Storm Water Pollution Prevention Program,(a) with your first annual report, (b) on another later date if established for your MS4 by the Commssioner, or(c) in accordance with the schedule in Appendix E for l Selected MS4s. The assessment will be reviewed by the Commissioner, who will provide opportunity for public input and hearing prior to denial or approval of your proposed Storm Water Pollution Prevention Program. The MPCA reserves the right to incorporate as much available information as possible in the decision making process, including the right to independently develop and evaluate potential alternatives to the discharge. �.. S. Implementation. You must implement your approved plan, includin g all ru approved BMPs, in accordance with the schedule in the approved Storm Water Pollution Prevention Program. B. Discharges to Waters with Restricted Discharges (Minn. R. 7050,0180, subp,6, 6a, and 6b). This permit does not authorize New or Expanded Discharges to waters where the applicable water quality standards restrict New or Expanded i Discharges,unless such discharges are in accordance with Minn. R. 7050.0180, subpart 6,6a, and 6b,and other applicable rules, and the following requirements. For MS4s that have discharges to outstanding resource value waters listed in Minn. R. 7050.0180,subp. 6, 6a or 6b(listed waters, or Waters with Restricted Discharges),the MPCA makes a Rebuttable Presumption that those MS4s have or will create a New or Expanded Discharge to a listed water. The following requirements create a schedule to bring discharges to listed waters into compliance: 1. In order to allow a New or Expanded Discharge to Waters with Restricted Discharges,the MPCA must determine that there are no prudent and feasible alternatives to the New or Expanded Discharge. The determination will be [' based on your demonstration. This demonstration should include, but is not t: limited to developing a plan to address prudent and feasible alternatives to the discharge. If You intend to argue that there are no prudent and feasible t; Page 27 of 33 Permit No: MNR040000 l( alternatives to the discharge to these waters,You must develop a plan to restrict the discharge to the extent necessary to preserve the existing high quality, or to preserve the wilderness,scientific, recreational,or other special characteristics that make the listed water an outstanding resource value water. 2. Here are the specific actions You must take: a. List. You must identify as part of your application for permit the waters with restricted discharges to which your M84 discharges. The list must be included with your application, to be submitted within 90 days after the permit effective date on page 1 of this permit or for Designated MS4s in accordance with Part W.B. b. Mnp. You must mark on US.G.S. watershed or topographic maps of 1:24,000 f scale or better at minimum the DNR minor subwatersheds in your jurisdiction i that discharge in whole or in part to waters with restricted discharges. You must provide a narrative estimate of the percent impervious surface based on current land use, the percent of future expected impervious surface based on zoning or comprehensive plans,and other information that may significantly affect your runoff to the listed waters. You must submit this map with your I ' application within 90 days after the permit effective date on page I of this ( permit or other later date if established by the Commissioner. . C. Assessment. You ntust then assess how your Stortn Water Pollution Prevention Program can be reasonably altered to eliminate New or Expanded Discharges to waters with restricted discharges. This assessment must be developed for New or Expanded Discharges produced from 1988 until the ' year 2020. Where You intend to argue that there are no prudent and feasible alternatives to New or Lxphnded Discharges to these waters,You must propose measures You will implement to restrict the discharge to the extent I necessary to preserve the existing high quality, or to preserve the wilderness, scientific,recreational, or other special characteristics that make the listed waters outstanding resource value waters. Measures that can be proposed include ordinances and zoning changes or other BMPs. You must present this assessment, together with your proposed changes to your Storm Water Pollution Prevention Program,for public comment during the annual public comment period required in the permit,prior to your first annual report(see Part VI.D) or prior to the schedule in Appendix E for Selected MS4s. d. Assessment Submittal. You must submit the assessment from Part 1X.B.2.c above,and your response to any public comments,with your plan and proposed changes to your Storm Water Pollution Prevention Program and submit it with your first annual report, or on another Iater date if established for your M84 by the Commissioner,or according to the schedule in Appendix E for Selected M84s. The plan and proposed changes to the Storm Water Pollution l Prevention Program will be reviewed by the Commissioner,who will provide l opportunity for public input and hearing pursuant to Minn. R. ch. 700I prior to denial or approval of your proposed Storm Water Pollution Prevention I . Page 28 of 33 Permit No: MNRO40000 Program modifications, The MPCA reserves the right to incorporate as much g � available information as possible in the decision making process,including the right to independently develop and evaluate potential prudent and feasible alternatives to the discharge. e. Implementation►. You must implement your approved Storm Water Pollution Prevention Program, including all DMPs in accordance with the schedule described in the approved Storm Water Pollution Prevention Program. C. Discharges Adversely Impacting Trout Waters(Minn.R. 6264.0050 subp. 2 and 4). L The following requirements apply to Trout Waters listed in Minn.R. 6264,0050, subp. 2 and 4: 1. This pen-nit does not authorize New or Expanded Discharges adversely impacting Trout Waters unless,at minimum, You establish administrative procedures or other measures to assure that You make the following determinations and document the basis for your decision: a. That there is no feasible and prudent alternative to the proposed discharge; and b, All prudent and feasible measures needed to avoid or Reduce impacts to Trout Waters, and to preserve the existing high quality of the water will be implemented (see Part IX.C.2 below). 2. If the discharge cannot be avoided, You must consider measures to protect water quality and prevent temperature increases. Acceptable measures include reduce the �. impervious surfaces,diversion away from the stream and use of filter strips, infiltration, biofiltration,or enhanced grass swales to treat runoff before discharge to the Trout Water. Innovative alternatives to ponds are specifically encouraged for I: Trout Water discharges if they provide equivalent treatment. D. Discharges to Wetlands (-.Minn. R. 7050.0130, subp. F, also 7050,0186). This permit does G not authorize Physical Alterations to Wetlands, or other discharge adversely affecting Wetlands, if the alteration will have a significant adverse impact to the designated uses of a Wetlaud. Any Physical Alterations to Wetlands that will cause a potential for a significant adverse impact to a designated use must be implemented in accordance with the avoidance, minimization and mitigation requirements of Minn.R. 7050,0186 and other applicable rules. E. Discharges Requiring Environmental Review (Minn. Stat. ch. 116D, and42 U.S.C. 4321 --43701), This permit does not replace or satisfy any environmental review requirements,including those under the Minnesota Environmental Policy Act(Minn. Stat. ch. 116D), the National Environmental Policy Act(42 U.S.C. §§ 4321 —4370 f),and rules implementing those laws. Any environmental review required of You by law, including preparation of environmental review documents such as environmental assessment worksheets,environmental impact statements, or environmental assessments, must be completed in accordance with those requirements. i Page 29 of 33 Permit No: MNRO40000 F. Discharges Affecting Threatened or Endangered Species. This permit does not replace or satisfy any review requirements for Threatened or Endangered Species,from discharges whose direct,indirect, interrelated, interconnected,or independent impacts would jeopardize a listed Threatened or Endangered Species or adversely modify a designated critical habitat. For any project resulting in a discharge having the potential to adversely impact Threatened or Endangered species, or their critical habitat,You must conduct your required review and coordination with appropriate agencies in accordance with those requirements. G. Discharges Affecting Historic or Archeological Sites. This permit does not replace or satisfy any review requirements for Historic or Archeological Sites from discharges which adversely affect properties listed or eligible for listing in the National Register of Historic Places or adversely affecting known or discovered archeological sites. For any project resulting in a discharge having the potential to adversely impact Historic or Archeological Sites,including significant anthropological sites and any burial sites,You must conduct your required review and coordination with the Minnesota State Historic Preservation Officer or other appropriate agencies in accordance with those requirements. l . H. Discharges Affecting Source Water Protection Areas (Minn. R. 4720.5100-- 4720.5590). You shall incorporate BMPs into your Stor in Water Pollution Prevention j Program to protect any of the following drinking water sources that your MS4 discharge may affect, and You shall include the map of these sources with the Storm Water Pollution Prevention Program if they have been mapped: ' 1. Wells and source waters for drinking water supply management areas identified as vulnerable under Minn. R. 4720,5205,4720.5210, and 4720.5330, and f' 2. Source water protection areas for surface intakes identified in the source water assessments conducted by or for the Minnesota Department of IIealth under the 1 federal Safe Drinking Water Act, U.S.C. § 300j — 13. l � I . i 4 Page 30 of 33 Permit No: MNR040000 i PART X. APPENDIX D: NONDEGRADATION FOR SELECTED MS4s �= The requirements of this section apply only to MS4s called Selected MS4s as described in Part XI(Appendix E). Certain MS4s have been selected to perform the requirements of this part L because their size and growth may be closely correlated with increased Storm Water flows and pollutant loading. Nondegradation review applies to all significant New or Expanded Discharges to all waters but does not negate the applicable requirements for outstanding resource value waters,requirements for special classes of waters, other requirements in Appendix C or the general requirements of the permit, (` A. Selected MS4s The basic requirement for all MS4s regulated under this permit is to develop a Storm Water Pollution Prevention Program that meets the requirements of the permit. An additional process is required of a limited number of permittees(30) that are listed in Appendix E. These F= Selected MS4s must submit to the Commissioner information described below to determine whether additional control measures beyond those of the permit Parts I through IX can be reasonably taken to minimize the impacts of the discharges. Selection, for purposes of this r permit,is described in Appendix E. 13. Loading Assessment � Each Selected MS4 must assess the change in Storm Water discharge loading for its permitted area using a pollutant loading water quality model that, at minimum, addresses changes in r Average Annual Flow Volume, Total Suspended Solids, and Phosphotus. This modeling will be I based on two time periods: from 1988 (1988-1990)to the present(2000-2005),and from the present to 2020. The Selected M84s must use a simple model, or another more complex model F that they find to be more appropriate,that addresses the parameters of concern. This may include a model that the Selected MS4 has already used. Outer assessment methods may be used if they can be shown to be as effective at quantifying the increase in loading as the modeling methods. The,models and/or other methods will be used as part of the assessment to develop the Nondegradation Report,to help in selecting appropriate BMPs that address nondegradation, to determine whether additional control measures can reasonably be taken to Reduce pollutant loading, and for a few Selected MS4s that elect to do so,to evaluate the significance of the New or Expanded Discharge. L C. Nondegradation Report Selected MS4s that have significant New or Expanded Discharges are required to complete a Nondegradation Report and,upon approval, to incorporate its findings on BMPs that address nondegradation into their Storm Water Pollution Prevention Program, The BMPs shall ` address changes in pollutant loadings as far as is reasonable and practical through future development. Additionally,the BMPs shall address, as far as is reasonable and practical,the negative impacts of increased Storm Water discharge volumes that cause increased depth and duration of inundation of Wetlands having the potential for a significant adverse impact to a designated use of the Wetland,or changes in stream morphology that have the potential for a r significant adverse impact to a designated use of the streams. . Page 31 of 33 Permit No: MNRO40000 The Nondegradation Report must include consideration of the Loading Assessment,which must include analysis of flow and may include removal of pollutants by BMPs already initiated. For purposes of this General Permit, 1988 levels consistently attained means runoff that would have been produced under approximately average conditions of rainfall. Local Storm Water management plans and other pertinent factors may also be considered. BMPs implemented by other parties may be considered when those BMPs affect the Storm Water from the area of the Selected MS4. If the pollutant Ioadings cannot be Reduced to levels consistently attained in 1988,the Report must describe reasonable and practical BMPs that the Selected MS4 plans to l incorporate into a modified.Storm Water Pollution Prevention Program. The Selected MS4 l must consider alternatives, explain which alternatives have been studied but rejected and why, and propose alternatives that are reasonable and practical. The Report must give high priority to BMPs that address impacts of future growth, such as ordinances for New Development. Where increases in pollutant loading have already occurred due to past development,the Report must consider retrofit and mitigation options (BMPs)that the Selected M84 determines to be reasonable,practical and appropriate for the community. The Selected MS4 is responsible for developing any site specific cost/benefit,social, and environmental information that the Selected MS4 wishes to bring to the Agency's attention. The Selected MS4 must incorporate the Blylps into a modified Storm Water Pollution Prevention Program and include an implementation 1 schedule that addresses New Development and i etrofit BMPs it proposes to implement. D. Public Participation Prior to submittal to the MPCA, the proposed Storm Water Pollution Prevention Program modifications to address nondegradation will be public noticed at the local level as required in the pen-nit(Part V.G.Le). Each Selected MS4 shall also submit its Storm Water Pollution Prevention Program modifications to address nondegradation to the appropriate local water authority(e.g. watershed organizations or county water planning authority)in time to allow for their review and comment. The Nondegradation Report explaining the proposed BMPs and the entire Storm Water Pollution Prevention Program must be made available to the public and local water authority upon request. E. Submittals for Selected MS4s Selected MS4s must submit their proposed changes to the Storm Water Pollution Prevention Program,reports addressing nondegradation for all waters (and restricted waters or prohibited waters if applicable), together with other supporting documents,to the MPCA in accordance with the schedule in Appendix E. This submittal must include: 1. The Loading Assessment; 2. The Nondegradation Report; 3. The proposed Storm Water Pollution Prevention Program modifications to address nondegradation; 4. The public and local water authority comments on the proposed Storm Water Pollution Prevention Program modifications to address nondegradation, with a Record of Decision on the comments; and i Page 32 of 33 Pen-nit No: MNR040000 S. An application to modify the permit. F. MPCA Review C The MPCA will review the above submittals in accordance with Minn. R. ch. 7001. After consideration of the Loading Assessment, the Nondegradation Report, public and local water authority comments,the Record of Decision by the Selected MS4, and other pertinent information, the 11'JCPCA will make a determination on the preliminary approval of the proposed Storm Water Pollution Prevention Program. The role of the MPCA during the review process will generally be limited to reviewing the information presented by the Selected MS4 L and comments made by others during the review process. However, the MPCA reserves the right to incorporate as much available information as possible in the decision making process, ( ' including the right to independently develop and evaluate potential reasonable and practical alternatives. G. Notice and Preliminary Determination The MPCA will provide statewide public notice and opportunity for hearing on any MPCA { determination of intent to deny or approve the Storm Water Pollution Prevention Program modifications to be implemented under this permit. The MPCA will provide public and MPCA comments to the Selected M84. The Selected MS4 will have the opportunity to respond to the comments prior to the MPCA snaking a final determination. H. Final Determination The Commissioner will make a final determination on the modifications to the Storm Water Pollution Prevention Program in accordance with Minn. R. ch, 7001. I. Implementation of the Approved Stornr Water Pollution Prevention Program l ; Following approval by the MPCA(as described in Part X.H above), the approved Storm Water 1 Pollution Prevention Program modifications, including any changes required by the MPCA, must be implemented by the Selected MS4 in accordance with the schedule in the approved Storm Water Pollution Prevention Program and modifications. L. F i i Page 33 of 33 Pennit No; MNR040000 PART XI. APPENDIX E: SELECTED MS4s [ This part describes the schedule of submittals of the items listed in Part X(Appendix D),item E to the MPCA for review and approval. The Commissioner has selected the MS4s listed below for further nondegradation review. The selection was based on the population growth experienced by the community during three time periods: from 1990 to 2000,based on census data; from 2000 to 2003,based on projections by the State Demographer and Metropolitan Council; and from 2000 to 2020, also based on the State Demographer and Metropolitan Council projections. The Commissioner also considered the size of the community as represented by the 2000 census. The Commissioner may also determine that additional MS4s be selected based on the same factors,or other factors in accordance with"Minn. R. ch. 7001 and other applicable rules. The following Selected MS4s shall submit the items listed in Part X (Appendix D), item E,to the MPCA for review and approval,postmarked on or before the listed dates. Selected MS4 Submittal date [ 1 Rochester 15 months after the effective date of the Permit 2 Woodbury 15 months after the effective date of the Permit 3 Maple Grove 15 months after the effective date of the Permit 4 Lakeville 15 months after the effective date of the Permit 5 Eden Prairie 15 months after the effective date of the Permit 6 Eagan 16 months after the effective date of the Permit 7 Plymouth 16 months after the effective date of the Permit 8 Blaine 16 months after the effective date of the Permit 9 Bloomin ton 16 months after the effective date of the Permit I 10 Duluth 16 months after the effective date of the Permit I 11 Brooklyn Park 17 months after the effective date of the Permit 12 Shakopee 17 months after the effective date of the Permit f 13 Apple Valley 17 months after the effective date of the Permit 14 St. Cloud 17 months after the effective date of the Permit 15 Burnsville 17 months after the effective date of the Permit 16 Prior take 18 months after the effective date of the Permit 17 Maplewood 18 months after the effective date of the Permit 18 Coon Rapids 18 months after the effective date of the Permit l 19 Andover 18 months after the effective date of the Permit f 20 Elk River 18 months after the effective date of the Permit 21 Savage 19 months after the effective date of the Permit 22 Farmin ton 19 months after the effective date of the Permit 23 St. Louis Park 19 months after the effective date of the Permit 24 Edina 19 months after the effective date of the Permit 25 Minnetonka 19 months after the effective date of the Permit 26 Chanhassen 20 months after the effective date of the Permit 27 Chaska 20 months after the effective date of the Permit 28 Inver Grove Heights 20 months after the effective date of the Permit 29 Rosemount 20 months after the effective date of the Permit 30 Cottage Grove 20 months after the effective date of the Permit APPENDIX D I I� 1 CITY OF LAKE ELMO i. I SWPPP lW OF LAKE ELMO �,,4 -gSG�'tY�TiYh46TL=aS.7CYSIt=4 �r . July 1- 5 , 200 l � 4 NPDES Phase II MS4 Permit Application Storm. Water Pollution Prevention Program. General Storm Water Permit Application (MN R. 040000) L ' Prepared for the City of Lake Elmo /'. Prepared b P y TKDA 444 Cedar Street, Suite 1500 t , NPDES Phase 11 MS4 Permit Application Storm Water Pollution Prevention Program � General Storm Water Permit Application 1 - (MN R 040000) City of Lake Elmo The City of Lake Elmo's SWPPP is designed to reduce the discharge of pollutants from the City's storm sewer system to the maximum extent practicable. To achieve this goal, standard Best Management Practices (BMPs) have been developed. The BMP measures are intended to address the 6 minimum control measures (MCMs) ` outlined in the MS4 Permit. The 6 MCMs are: 1. Public Education and Outreach �. 2. Public Participation/Involvement 3. Illicit Discharge Detention and Elimination 4. Construction Site Stormwater Runoff Control 5. Post-Construction Stormwater management in New Development and Redevelopment 1? 6. Pollution Prevention/Good Housekeeping The following table provides the title of each BMP measure and its location in the SWPPP. BMP ID hest Management Practice Permit Page Numbers Reference Number la-1 Distribute Educational Materials V.G.La I lb-1 Implement an Education Program V.0.1.b 2 le-1 Education Program:Public Education and Outreach V.G.l.c 3 I le-2 Education Program: Public Participation V.G.Lc 5 1 lc-3 Education Program: Illicit Discharge Detection and V,G.I.c 7 Elimination j lc-4 Education Program:Construction Site Run-off Control V.G.Lc 8 Ic-5 Education Program: Post-Construction Stormwater V.G.1.c 9 Mana etnent in New Development and Redevelopment Ic 6 Education Program: Pollution Prevention/Good i Housekee ing for Municipal.Operations V.G.I.c 10 ld-1 Coordination of Education Program V.G.Ld 11 le-1 Annual Public Meetin V.G.1.e 12 2a-1 Com2ly with Public Notice Requirements V.G.2.a 13 2b-1 Solicit Public Input and opinion on the Adequacy of the V.G.2.b 14 j 1 SWPPP II 2c-1 Consider Public In ut V.G.2.c 16 �. 3a-1 Storm Sewer System M-ap V.G.3.a 17 ;I 3b-1 Regulatory Control Program V.G.3.b 18 i i 3c-1 Illicit Discharge Detection and Elimination Plan V.G.3.c 19 3d-1 Public and Employee Illicit Discharge Information Program V.0.3.d 21 3e-1 Identification of Non Stormwater Discharges and Flows V,G.3.e 23 M Source Water Protection Areas IV.C.6 25 4a-1 Ordinance or other Regulatory Mechanism V.G.4.a 26 4b-1 Construction Site Implementation of Erosion and Sediment V,G.4.b 27 Control BMPs 4c-1 Waste Controls for Construction Site Operators V.G.4.c 28 4d-1 Procedure for Site Plan Review V.G.4,d 29 4e-1 Establishment of Procedures for the Receipt and V,G.4.e 30 Consideration of of Reports of Stormwater Noncompliance 4f-1 Establishment of Procedures for Site Inspections and V.G.4.f 31 ti Enforcement 5a-1 Development and Implementation of Structural and/or Non- V:0.5.a 33 structural BMPs 5b-I Regulatory Mechanism to Address Post Construction Runoff V.G.5,b 34 . from New Development and Redevelopment 5c-1 Long-term Operation and Maintenance of BMPs V,G.5.c 35 6a-1 Municipal Operations and Maintenance Program V,0.6,a 36 6a-2 Street Sweeping 37 6b-2 Annual Inspection of All Structural Pollution Control V.0.6,b.2 Devices 38 6b-3 Inspection of a Minimum of 20 percent of the MS4 Outfalls, V.G.6.b.3 39 Sediment Basins and Ponds Each Year on a Rotatin Basis 6b-4 Annual Inspection of All Exposed Stockpile, Storage and V,G.6.b.4 40 Material Handlin Areas 6b-5 Inspection Follow-up Including the Determination of V,G,6,b.5 Whether Repair,Replacement,or Maintenance Measures are 41 Necessary and the Implementation of the Corrective Measures 6b-6 Record Reporting and Retention of all Inspections and V.G.6.b.6 Responses to the Inspections 42 6b-7 Evaluation of Inspection Frequency V.G,6.b.7 43 IV,D-1 Impaired Waters Review Process IV.D 44 G IX.B. Discharges to Waters with Restricted Dischar es Assessment IX.B. 46 to 1 ` BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 1-PUBLIC EDUCATION AND OUTREACH Unique BMP Identification Number: la-1 *BMP Title: Distribute Educational Materials *BMP Description: In cooperation with the appropriate County and appropriate Water Management Organizations, stormwater pamphlets and fliers promoting stormwater education and positive behaviors will be developed and made publicly available.Public service organizations may help provide distribution,which will include posting, handouts, and j displays throughout the City. *Measurable Goals: + Number of stormwater-related materials developed and distributed, + Number of people informed and participating. *Timeline/Implementation Schedule: 2006: + Develop stormwater handout information. + Establish pamphlets racks in common areas of the City Hall. ( + Distribute pamphlets and other stormwater information at public meetings or City events. ,1 2007 -2010: ' • Update the developer,construction and engineering practitioner community mailing list annually as well as mail educational materials at least once a year. Continue with the distribution of SWPPP information,revising as necessary after soliciting comments and suggestions Specific Components and Notes: *Responsible Party for this BMP: { Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org *Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application due to incompleteness. f f � wq-strm4-50 1 3/06 I ' t� BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: . PUBLIC EDUCATION AND OUTREACH Unique BMP Identification Number: lb-1 *BMP Title: Implement an Education Program *BMP Description: In cooperation with the appropriate County and appropriate Water Management Organizations, the City will develop and implement an educational program that individually addresses each minimum control measure for the selected audience groups. The minimum control measures include: (1)public education and outreach, (2) t public participation, (3) illicit discharge detection and elimination, (4) construction site storm water runoff _ control, (5) post construction storm water management in new development and redevelopment, and(6) pollution prevention/good housekeeping for municipal operations. The audience groups include City staff, general public, and contractors. *pleasurable Goals.- Number of educational materials developed and distributed. • Number of educational workshops developed and presented. • Number of people attending workshops. t *Timeline/Irnplementation Schedule: 2006: • Develop a procedure for creating and implementing an educational program. 2007 -2010: • Develop and implement an educational program. Evaluate and modify the educational program as r necessary to meet permit goals. ; Specific Components and Notes: L : *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org 'Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application due ' to incompleteness. �i �V wq-strrn4-50 2 3106 { J BIV P Summary Sheet ,l MS4 Name: City of Lake Elmo Minimum Control Measure: PUBLIC EDUCATION AND OUTREACH 7k Unique BMP Identification Number: lc-1 *BMP Title: Education Program: Public Education and Outreach *A.udience(s) Involved: General public including City residents,homeowners,business owners, and school children(students K-12). *Educational Goals for Each Audience: Increase public awareness and understanding f stormwater p g o issues within the community. Inform and educate the public about the impacts of stormwater runoff on water quality. *Activities Used to Reach Educational Goals: 1) In cooperation with appropriate County and appropriate Water Management Organizations,highlight stormwater issues through City sponsored community events and programs that focus on public participation, such as: Volunteer community cleanup days. • Volunteer river, stream, and pond cleanup program. • Volunteer native tree and shrub planting program. • Volunteer storm drain stencil program. 2) In cooperation with appropriate County and appropriate Water]Management Organizations,establish a stormwater hotline for citizens to report illegal dumping. 3) Articles in the community newsletter that highlight seasonal stormwater issues and stormwater related community events and programs. 4) Stormwater information on the City web site or in cooperation with appropriate County and appropriate Water Management Organizations 5) Stormwater educational materials provided at public places. • Stormwater poster display and educational guides at the City Hall and local public library. • Signage in public places `4 *Activity Implementation Plan: 1- 2006: • In cooperation with the appropriate County and appropriate Water Management Organizations, develop stormwater page on a web site and post for public access. l • In cooperation with the appropriate County and appropriate Water Management Organizations, develop a plan for sponsoring and implementing the volunteer public participation events and programs.This plan j' could include holding community cleanup days on a periodic basis,promoting County tree and shrub planting programs and promoting school programs to stencil storm drains. 2006-2008: • In cooperation with the appropriate County and appropriate Water Management Organizations,research what educational materials are available and effective and have these materials in place for the public to view by the end of 2007. 2007: • Partner with the East Metro Water Resource Education Program(EMWREP). wq-st1-m4-50 g 3/06 2007 -2009: • Evaluate the attendance data for trends. • Review public education outreach efforts. 2006 -2010: J , • Track number and location of illegal dumping incidents reported. Publish stormwater articles in the Community newsletter or on a web page. Verformanee Measures: • In cooperation with the appropriate County and appropriate Water Management Organizations,complete a plan and implement volunteer public participation events and programs. • Cleaner waters documented by measures such as before and after photographs. • Number of storm drains that are marked by 2010 in targeted neighborhoods. • In cooperation with appropriate County and appropriate Water Management Organizations,published articles on the appropriate web site. • In cooperation with the appropriate County and appropriate Water Management Organizations, track the i number of"hits" on the appropriate web site stormwater page. • Track increase/decrease in the number of beach closings, f *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator E' Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org t 41ndicates a REQUIRED field. Failure to complete any required field will result in rejection of the application due to incompleteness, wq-strru4-50 4 3/06 ;I k, i BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: PUBLIC EDUCATION AND OUTREACH Unique BMP Identification Number: I c-2 *BMP Title: Education Program: Public Participation ii *Audience(s) Involved: 11 General public including City residents,homeowners, and business owners. *Educational Goals for Each Audience: 1 1) Increase public awareness and understanding of stormwater issues within the community. 2) Inform and educate the public about the impacts of stormwater runoff on water quality and what they can.do to actively protect local lakes and streams from polluted stormwater runoff. 3) Inform and educate the public about how the City manages stormwater runoff through its' Storinwater Pollution Prevention Program (SWPPP). *Activities Used to Reach.Educational Goals: 1) The City will report in the community newsletter on activities related to managing stormwater and implementing the SWPPP, Topics for the newsletter may include information about the water quality of our City lakes and streams; events and programs the public can participate in to raise their awareness about stormwater impacts; specific stormwater management activities the City is implementing; and the stormwater I budget/fees. `= 2) In cooperation with the appropriate County and appropriate Water Management Organizations, a public informations meeting (in addition to the annual meeting on the SWPPP) will be held to update citizens on the Citys'progress toward implementing the SWPPP, and to provide information on stormwater related budget/fee I issues. To encourage citizens to attend, the City will plan the public information meeting to coincide with another City sponsored event.The City will also consider providing some type of stormwater related promotional item for Park Cleanup Day participants (e.g. "raingarden"seed packets,plants) *Activity Implementation Plan: • 2006 - 2010: { • in cooperation with the appropriate County and appropriate Water Management Organizations, periodically publish articles on stormwater management and the SWPPP . • In cooperation with,the appropriate County and appropriate Water Management Organizations,hold one I� combined public information meeting/recognition event annually. Provide notice of the meeting 30 days prior to the meeting/event date. Performance Measures: • In cooperation with the appropriate County and appropriate Water Management Organizations,publish stormwater articles periodically. f • In cooperation with the appropriate County and appropriate Water Management Organizations, complete public notice. In cooperation with the appropriate County and appropriate Water Management Organizations, track the number of citizens attending the meeting/event. • In cooperation with the appropriate County and appropriate Water Management Organizations,track the number of questions about the SWPPP/stormwater issues addressed at the meeting. wq-strm4-50 5 3106 In cooperation with the appropriate County and appropriate Water Management Organizations, at the end of 2007,the City will evaluate the effectiveness of the Education Program for Public Participation and make adjustments as needed to increase public awareness and participation. 1' *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Slioyt@lakeelmo.org *Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application due to incompleteness, fr i � r Y �pp r fl .. 1 ' �M1 i �r A wq-stnn4-50 6 3l06 r f BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: PUBLIC EDUCATION AND OUTREACH Unique BMP Identification Number: le-3 *BMP Title: Education Program: Illicit Discharge Detection and Elimination *Audience(s)Involved: Activities planned under the Illicit Discharge Detection and Elimination Measures portion of the Storm Water Pollution Prevention Program (SWPPP)will be directed towards employees of the City, with an emphasis on Physical Plant employees, and the general public. *Educational Goals for Each Audience: The SWPPP activities under Minimum Control Measure(MCM) 3 will focus on development,implementation, and lenforcement of management strategies that will lead to the reduction, elimination and the impact of illicit pollutant discharges into the stormwater system throughout the City. f *Activities Used to Reach Educational Goals: The City will educate its employees on the hazards of improper waste disposal and ways to detect and eliminate illicit discharges.The educational program will include procedures in locating priority areas likely to have illicit discharges;procedures for tracing the source of illicit discharge; procedures for removing the source of discharge; and the procedures for program evaluation and assessment. l The education program will also focus on educating City residents on the proper disposal of oil, gas, and other waste materials. This information will be provided through educational training, information brochures,posters, web page and inspections of the storm drain system.. *Activity Implementation Plan.: 2006: • Develop and begin educational program training y 2007 -2010: 1 • Assess goals and continue educational program training *Performance Measures: The number of educational fliers and/or materials distributed. • Attendance numbers at training sessions. The number of locations determined to have the potential for illicit discharges. • The number of illicit discharges reported. The number of corrective measures taken to prevent illicit discharges. *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org *Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application due to incompleteness. wq-strm4-50 7 3106 BMA' Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: PUBLIC EDUCATION AND OUTREACH ; Unique BMP Identilzcation Number: 1c-4 *BMP Title: Education Program: Construction Site Run-off Control *Audience(s)Involved: Activities planned under the Construction Site Storm Water Runoff Control portion of die Storm Water Pollution Prevention Program (SWPPP) will be directed toward contractors, construction site operators, inspectors, and enforcement personnel of the City. f *Educational Goals for Each Audience: The SWPPP activities implemented under this will focus on program development, implementation, and enforcement of management strategies that will reduce or eliminate the impacts of stormwater runoff into the storm sewer system from any construction activity that results in a land disturbance of greater than or equal to one acre. "Activities Used to Reach Educational Goals: In cooperation with appropriate County and appropriate Water Management Organizations develop procedures to r educate contractors on construction site Best Management Practices (BMPs),inspections and enforcement of installed erosion and sedimentation control measures,This program will address contractor BMP educational and training measures.Educational and training measures may include written educational materials, erosion and sediment control workshops,and city specific workshops. *Activity Implementation Plan: 2006: k In cooperation with appropriate County and appropriate Water Management Organizations develop education procedures. 2007 - 2010. • Distribute written educational materials. • Distribute City standard details and specifications for erosion and sediment control. • Conduct City workshops for builders and developers. • Attend erosion and sediment control workshops. • Begin BMP enforcement. *Performance Measures: • The number of enforcement actions taken. • The number of site inspections. • The number of contractors and City personnel trained. "Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 ' E-mail: Shoyt4lakeelmo.org *Indicates a REQUIRED field, Failure to complete any required field will result in rejection of the application due d. to incompleteness. wq-stom4-50 8 3/06 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: PUBLIC EDUCATION AND OUTREACH Unique BMP Identification Number: I c-5 ' *BMP Tine: Education Program,: Post-Construction Stoz•raiwater Management in New Development and Redevelopment *Audience(s)Involved: I Activities planned under the Post-Construction Storm Water Management in New Development and Redevelopment portion of the Storm Water Pollution Prevention Program will be directed toward developers, ( contractors, construction site operators, inspectors and enforcement personnel. l educational Goals for Each Audience: The SWPPP activities under this Control Measure will focus on development, implementation, and enforcement of a program that will reduce or eliminate the impacts of stormwater runoff from new development and re- development projects that disturb greater than or equal to one acre, including projects that are less than one acre and are part of a larger development plan, that discharge into the storm sewer system. *Activities Used to Reach Educational Goals: The City will provide information about educational outreach on developing, implementing, and enforcing a program that will reduce or eliminate the impacts of stormwater runoff from new development and re-development projects disturbing greater than or equal to one acre, including projects that are less than one acre and are part of a larger development plan, that discharge into the stormwater conveyance system throughout the City. 1 '*Activity Implementation Plan: 2006: Develop information about existing educational programs. 2007 - 2010: • Provide information about existing educational programs. 1 *Performance Measures: 0 Number of flyers,posters,or other public education tools distributed. • Number of training programs available to City staff and contractors. I *Responsible Party for this BMP: i 4 Naive: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo,org *Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application clue to inconipleteness, I , wcl7strrn4-50 9 3/06 BMP Summary Sheet MS4 Name: City of bake Elmo1 Minimum Control Measure: PUBLIC EDUCATION AND OUTREACH Unique BMP Identification Number: lc-6 *BMP Title: Education Program: Pollution Prevention/Good Housekeeping for Municipal Operations *Audience(s)Involved: Activities planned under the Pollution Prevention (Good Housekeeping)portion of the Storm Water Pollution Prevention Program will be directed toward City personnel and the general public. �J *Educational Goals for Each Audience: The SWPPP activities impleEnented under this Minimum Control Measure will focus on developing and , implementing general procedures for an operations and maintenance program that will reduce or eliminate the impacts of stormwater pollution from open space maintenance, snow disposal, vehicle and building maintenance, land disturbances, and stormwater conveyance system maintenance. *Activities Used to Reach Educational Goals: . The City will provide its personnel with information about existing educational outreach programs that will reduce or eliminate the impacts of stormwater runoff from facilities and maintenance operations that discharge into the stormwater conveyance system. ti- *Activity Implementation Plan: 200G: l p • Develop information about existing educational outreach programs. 2007-2010: 1 C • Provide information about existing educational outreach programs and training to City staff. • Distribute educational materials to the general public as needed. *Performance Measures: • Number of flyers,posters,or other public education tools distributed. • Number of training programs offered to City staff. *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelrt3o.org :'Indicates a REQUIRED,jield. Failure to complete any required fie'd will result in rejcstion of the application due f to incompleteness. wq-strn14-50 10 3/06 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: PUBLIC EDUCATION AND OUTREACH Unique BMP Identification Number: Id-1 *BMP Title: Coordination of Education Program . ' BMP Description: ` The City of Lake Elmo will coordinate its education program with other agencies that focus on storm water education. These agencies may include: Washington Conservation District,Valley Branch Watershed District, South Washington Watershed District,Brown's Creek Watershed District, and the Minnesota Pollution Control Agency. { *Measurable Goals: • Number of consistent messages delivered {educational,promotional or motivational}through all media. Number of instances when educational program is coordinated. *`I'tmelineli l m lementation Schedule: 1 2006: • Develop procedures for coordination of educational programs, 2007 - 2010: } • Implement the program.Evaluate the program for strength and weaknesses. Implement improved methods. II r Specific Components and dotes: 1 *Responsible Party for this BMP: Nahie: Susan Hoyt Department: City Administrator Phone: 651-233-5401 s� E-mail: Shoyt@1akeelmo.org 11ndicates a REQUIRED field. Failure to complete an),required field will result in rejection of the application clue to incompleteness. I � wq-stnn4-50 11 3/06 • � i BMP Summary Sheep. MS4 Name: City of Lake Elmo }, Minimum Control Measure: PUBLIC EDUCATION AND OUTREACH Unique BMP Identification Number: le-1 *BMP Title: Annual Public Meeting *BMP Description: A public informational meeting will be held annually to address the Storm Water Pollution Prevention Program (SWPPP), The annual meeting will be held at the City Hall or in a place that is generally convenient to persons expected to attend the meeting. Notice of the public meeting will be provided 30 days prior and will include the i. date, time, and meeting location, and include location of a public copy of the City's SWPPP. Distribution of this notice to the community will be published through the City's official newspaper, The community will be encouraged to attend,allowing its members to discuss various viewpoints and provide input concerning appropriate t stormwater management policies and Best Management Practices. A copy of the meeting notice will be sent to MPCA, appropriate City and County officials, and all other persons who have requested that they be informed of .j such a public meeting. r�. *Measurable Goals: L. • Number of Annual Public meetings conducted. Notice of public meeting provided. • Annual report to MPCA submitted. *`.1'lmelinelImplementation Schedule; 2006: • Develop procedure for conducting the Annual Public Meeting. r 2007 -2010: + Implement and evaluate the procedure established for Annual Public Meetings. 2006-2010: • Conduct annual public informational meeting on the SWPPP by June 30th of each year, Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 L. E-mail: Shoyt@lakeelmo.org 41ndicates a REQUIRED fielel, Failure to complete any required field will result in.. rejection of the application dace to incompleteness. f wy-strm4-50 12 3/06 BMP Summary Sheet MS4 Name: City of Lake EImo Minimum Control Measure: 2-PUBLIC PARTICIPATION/INVOLVEMENT Unique BMP Identificaflott Number: 2a-I *BMP Title: Comply with Public Notice Requirements *BMP Description: Notice of the public meeting will be provided 30 days prior to the meeting. The notice must contain a reference to the Storm Water Pollution Prevention Program, the date, time, and meeting location, a concise description of the manner in which the meeting will be conducted and include location of a public copy of the City's SWPPP. Notice of the public meeting will be provided 30 days prior and will include the date, time,and meeting location, and include location of a public copy of the City's SWPPP. Distribution of this notice to the community will be published through the City's official newspaper.The community will be encouraged to attend, allowing its members to discuss various viewpoints and provide input concerning appropriate stormwater management policies and Best Management Practices. A copy of the meeting:notice will be sent to the MPCA, appropriate City and County officials, and all other persons who have requested that they be informed of such a public meeting. Alternative advertising methods need to be used whenever possible, including radio or television spots, postings at bus or subway stops, announcements in flyers, telephone notifications, and multilingual announcements. *Measurable Goals: • Number of public meetings conducted. ( 'ij • Number of educational surveys conducted. ( II • Number and methods of alternative advertising methods used. *Timeline/Implementation Schedule: 2006: ,f • Develop a distribution program. • Develop advertising methods. 2007 - 2010: • Implement the distribution program. • Implement advertising methods. Monitor the program. 2006-2010: Provide notice of the annual public informational meeting on the SWPPP 30 days prior to the meeting. Annual meetings must be held by June 30th of each year. Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org *Indicates a REQUIRED field. Failure to complete an}, required field field will result in rejection of the application due to incompleteness. wq-strm4-50 13 3/06 BMP Summary Sheet MSS!Name: City of Lake Elmo Minimum Control Measure: 2-PUBLIC PARTICIPATION/INVOLVEMENT Unique BMP Identification Number: 2b-1 *BMI'Title: Solicit Public Input and Opinion on the Adequacy of the SWPPP *BMP Description: 1) In cooperation with the appropriate County and appropriate Water Management Organizations, the City will use the education and outreach efforts outlined on BMP Summary Sheet 10-2(Education Program: Public Participation) for providing information to the general public about how the City manages stormwater runoff f through its Stormwater Pollution Prevention Program (SWPPP), to encourage the public to learn about the SWPPP, and to facilitate public input and comment on the SWPPP, 2) If the annual public meeting on the SWPPP is scheduled to occur during a regular meeting of the City Council, (' the City will request that the SWPPP be placed on the meeting agenda at a tinge that will be conducive to the , public attending and providing input on the SWPPP (i.e. not at the end of the agenda). 3) At the annual meeting, the City will provide a presentation on the purpose, goals, and requirements of the- SWPPP to educate,inform, and encourage citizens to provide input and comment on the SWPPP. i 4) The City will provide opportunity for interested persons to make oral statements or provide written comments on the SWPPP at the meeting. A reasonable amount of time will be made available at the meeting for a f questions and comments relating to the SWPPP, Persons not able to attend the meeting may submit written comments on the SWPPP within the time identified in the public notice for the meeting. 5) The City will also solicit public input and provide opportunity for comment on the SWPPP at any other subsequent public meetings, as needed, regarding modifications of or amendments to the SWPPP. ti *Measurable Goals: 1) Increase citizen's understanding of the impacts of storrwater runoff and increase public input on the SWPPP. Evaluate the level of public participation and input on the SWPPP; review the Education Program for Public Participation and make adjustments as needed to increase public participation/involvement on the SWPPP. r 2) Track the number of attendees at the annual public meeting oil the SWPPP. 3) Prepare and provide a presentation on the SWPPP. 4) Track the number of oral and written comments received on the SWPPP, and the number of questions addressed at the annual public meeting. A summary of the comments submitted on the SWPPP and the : questions addressed at the meeting will be made available on the City web site stormwater page. 5) Mold additional public meeting(s)regarding modifications and/or amendments to the SWPPP; track the level of public input. ii *Timeline/Implementation Schedule: • 2006 2010: • In cooperation with the appropriate County and appropriate Water Management Organizations, implement ' the education and outreach efforts according to the timeline/implemejitation schedule in BMP Summary . Sheet le-2. 2007 -2009: • Review the Education Program for Public Participation, make adjustments as needed. 2006-2010: • Hold a public meeting on the SWPPP annually. Annual meetings must be held by June 30th of each year. Specific Components and Notes: The City staff will pose questions or initiate discussion at the meeting iiu an effort to encourage the public to ask questions and submit comments on the SWPPP. { wq-strm4-50 14 3/06 i *Responsible Party for this BMP: 1 Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelnao.org 'Indicates a REQUIRED field. Faila{re to complete any required field will result in rejection of the application due to incompleteness. l k1 t j 4 1 wq-strnA-50 15 3/06 BMP Summary Sheet it f MS4 Name: City of Lake Elmo Minimum Control Measure: 2-PUBLIC PARTICIPATION/INVOLVEMENT Unique BMP Identification Number: 2c-1 *BMP Title: Consider Public Input *BMP Description: The City will document public input from the annual public informational meeting that is outlined on BMP Summary Sheet 2a-1 (Comply with Public Notice Requirements) and BMP Summary Sheet 2b-1 (Solicit Public 4 Input and Opinion on the Adequacy of the SWPPP). The City will review and consider all public input for I incorporation to the SWPPP, if appropriate. l : f *Measurable Goals: • Documentation of attendance numbers at the annual meeting. • Document public input received at the annual meeting;. • Summary memo documenting recommendations and action taken as a result of the public input, *Timeline/Implementation Schedule: I 2006 -2010: • A public informational meeting will be held annually so recommendations can be reviewed and considered for incorporation to the SWPPP. Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@Iakeelmo.org '11ndacates a REQUIRED field. Failure to corraplete ally required field will result in rejection of the application clue to incompleteness. wq-strm4-50 16 3106 BMP Summary Sheet MS4 Nance: City of Lake Elmo ) L Minimum Control Measure: 3-ILLICIT DISCHARGE DETECTION AND ELIMINATION Unique BMP Identification Number: 3a-1 *BMP Title: Storm Sewer System Map *BMP Description: Identify(1) ponds, streams, lakes, and wetlands that are part of the conveyance system,(2)structural pollution control devices (grit chambers,separators,etc.), (3)all pipes and conveyances that are at least 24 inches in diameter, and (4)outfalls, including discharges from the City drainage system to other MS4s or waters and wetlands that are not part of the City drainage system, (5) structures that discharge stormwater directly into groundwater and overland discharge points, and (6)all other points of discharge fro)-n the City outlets. { `Measurable Goals: • The number of pollution control devices recorded. . • The number of discharge points ideatified. 0 The linear feet of conveying system. *Tinieline/Inmplementation Schedule: 1 2006 - 2010: A map will be developed by June 30, 2008 and periodically updated. The neap will be made publicly available. } t` r Specific Components and Notes: Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator . Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org i4 411ndicates a REQUIRED field.Failure to complete any required field will result in rejection of the application clue to incompleteness. wq-strm4-50 17 3/06 I BMP Summary Sheet MS4 Name: City.of Lake Elmo Minimum Control Measure: 3-ILLICI'I'DISCHARGE DETECTION AND ELIMINATION Unique BMP Identification Number: 3b-1 *BMP Title: Regulatory Control Program 1 *BMP Description: The Regulatory Control Program establishes ways the illicit discharge is detected and eliminated. Other BMPs need to be established that would enable illicit discharge to be detected and eliminated. The City will develop and implement a program to detect and address non-stormwater discharges, including illegal dumping, to your system. The Program to detect and address illicit discharges is the cen(ral component of this measure. The plan is dependent upon several factors including the MS4's available resources, size of staff, and degree and character of its illicit discharges. There are four steps of a recommended plan: • Procedures for locating priority areas likely to have illicit discharges • Procedures for tracing the sources of an illicit discharge 0 Procedures for removing the source of the discharge • Procedures for program evaluation and assessment *Measurable Goals: ' • Regulatory Program is reviewed • Other BMPs are implemented *Timeline/Implementation Schedule: 2006: Review and modify ordinances and/or policies and enforcement procedures and actions that may help prevent illicit discharges to stormwater systems (i.e. secondary containment of fuel products and hazardous material ordinances) 2007: Purchase equipment necessary for the implementation of the modified hazardous materials cleanup procedures and train employees. 2008 -2010: • Create illicit discharge ordinance. • Evaluate the Regulatory Program. ( Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org :11ndicates a REQUIRE a field. Failure to complete any required field will result in rejection of the application clue to incompleteness. wq-strni4-50 18 3A)6 BMP Summary Sheet M84 Name: City of Lake Elmo Minimum Control Measure: 3-ILLICIT DISCHARGE DETECTION AND ELIMINATION Unique BMP Identification Number: 3c-1 : *BMP Title: Illicit Discharge Detection and Elimination Plan t *BMP Description: The City will develop a program to detect and identify illicit discharges, including a plan to control and eliminate the contributors, which will adhere to the following steps: • Locate the problem area by using public complaints • Visual screening of outfalls and pump station during the dry weather, and or during regular system maintenance and inspection activities • Find the source of illicit discharge r • Remove or correct the problem + Document the actions taken and sumtnarize for the annual report The program will identify methods for public reporting of illicit discharges including the development of an IDDE website link and phone number, f If the City identifies any of the following categories of non-stormwater flows as significant contributors of pollutants,the City will develop a plan to control and eliminate the contributors to the storm sewer system: • 'Water line flushing r • Landscape irrigation • Diverted stream flows • Rising ground waters • Uncontaminated ground water infiltration Uncontaminated pumped ground water • Discharges from potable water sources • foundation drains S • Air conditioning condensation * Irrigation water * Springs i; + Water from crawl space pumps • Footing drains • Lawn watering • Individual residential car washing • Chlorinated water discharges • Street wash water • blows from fire-fighting activities *Measurable Goals: • The number of illicit discharges reported and identified. �r • The number of illicit discharges prevented,stopped or removed, *Timeline/Implementation Schedule: 2006: • Develop and implement an illicit discharge detection program. 2006-2010: + Mitigate potential illicit discharge sites. 2008 - 2010: wq-strn34-50 19 3/06 l Continue detection and elimination �7I'Obl'£1111S. Specific Components and Notes: *Responsible Part for this BMP: y 1 Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org, veld. Failure to coat)lefe any re aired field will result in rejection o the application elite lndtcrttes a REQUIRED field.I Y �1 f J .f I l to incompleteness. s ( wq-strm4-50 20 3/06 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 3-ILLICIT DISCHARGE DETECTION AND ELIMINATION Unique BMP Identification Number: 3d-1 *BMP Title: Public and Employee Illicit Discharge Information Program 1 *BMP Description: In cooperation with the appropriate County and appropriate Water Management Organizations, the City will use the education efforts outlined on BMP Summary Sheet lc-3 (Education Program: Illicit Discharge Detection and Elimination)for providing information to the general public and City employees concerning the hazards associated with illegal discharges and the improper disposal of wastes. In addition, the City will develop a separate effort to provide training to City employees.This training will focus on those City employees that are involved in activities out in the community (c.g. Public Works/Engineering and Parks Department field staff) which may impact f stormwater duality including; road salt and sand application, landscaping, and other activities.The City intends to provide each employee with broad based training followed by periodic retraining which will focus on specific, yet to be determined, issues. *Measurable Goals: 1) See BMP Summary Sheet Ic-3 for Measurable Goals concerning public and City employee education efforts regarding Illicit Discharge Detection and Elimination. 2) Develop a training program for educating City employees about the hazards associated with illegal discharges and the improper disposal of wastes which relate to their work activities. 1 3) Train all City employees who are involved in activities which could possibly result in illicit discharges to stormwater. 4) Develop a training program to provide annual retraining, with specific focused training efforts, to City employees. { 5) Implement annual retraining and focused training efforts. *Timeline/Implernentation Schedule: • See BMP Summary Sheet Ic-3 for Timeline/Implementation Schedule concerning public and City employee education efforts regarding Illicit Discharge Detection and Elimination. 2006: • In cooperation with the appropriate County and appropriate Water Management Organizations,develop a training prograrn for educating City employees about the hazards associated with illegal discharges and the improper disposal of wastes which relate to their work activities. 2007: • Train all City employees who are involved in activities which could possibly result in illicit discharges to stormwater. 2008: • In cooperation with the appropriate County and appropriate Water Management Organizations, develop a ( training program to provide annual retraining and focused training efforts to City employees and implement ( this training. 2009 -2010: • Continue annual retraining and focused training efforts. Specific Components and Notes: To identify areas which may be addressed as part of retraining/focused training efforts,the City will develop a { process for conducting an illicit discharge evaluation of City public works projects. wg-strrn4-50 21 3/06 . [ : *Responsible Party for this BM Name: Susan Hoy t : Department: City kdm6A tr Phone: 623 S O! { E-mail: Shoyt@lakeelmo.org ( iccfesaREQUIRED fleld. £allure «compltee any r&««2e fieldwm result in rejection qf the gpplt «ioldue . to incompleteness. flu L. { (.. r/ . . {. [: (: (- . ( . . • {\ { [ [ ' . wq rA-50 2 p3 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 3-ILLICIT DISCHARGE DETECTION AND ELIMINATION Unique BMP Identification Number: 3e-1 k**BMPITitle: Identificationof Non StormwaterDischargesand Flows BMP Description: The City will develop a process to evaluate whether any of the following categories of non-stormwater discharges or flows are significant contributors of pollutants to its MS4: water line flushing, landscape irrigation, diverted stream flows,rising ground waters, uncontaminated ground water infiltration, uncontaminated pumped ground water, discharges from potable water sources,foundation drains, air conditioning condensation, irrigation water, springs, water from crawl space pumps, footing drains, lawn watering, individual residential car washing, flows from riparian habitats and wetlands, dechlorinated swimming pool discharges, street wash water, and discharges or flows from fire fighting activities. For any non-stormwater discharges or flows which the City finds to be a significant contributor of pollutants to the MS4, the City will develop an action plan to evaluate and address the impact the discharge is having on stormwater quality. *Measurable Goals: 1) Develop a process to investigate and evaluate the potential for the non-stormwater discharges identified in permit Part V.G.3.e (see above) to be significant contributors of pollutants to our MS4. 2) Conduct investigation and evaluation of non-stormwater discharges and flows. 3) For those non-stormwater discharges or flows identified as significant contributors of pollutants to our MS4, develop an action plan to evaluate and address the impact the discharge is having on stormwater duality. 4) Implement the action plan for significant non-stormwater discharges and flows. *Timeline/Implementation Schedule: • 2006: • Develop a process to investigate and evaluate non-stormwater discharges and flows. 2007: 1 Conduct and investigation and evaluation of non-stormwater discharges and flows and develop action plans 1 for those which are identified .as being significant contributors of pollutants to our MS4. 2008: • Implement the action plans for significant non-stormwater discharges and flows. 2009- 2010: • Continue with an action plan concerning significant non-stormwater discharges and flows. • Evaluate the implementation phase of the action plans and make adjustments, as necessary, to prepare foi-a permanent program for the identification of non-stormwater discharges. Specific Components and.Notes: In cooperation with the appropriate County and appropriate Water Management Organizations, the City plans to develop a public education component to inform residents about the need and procedures to dechlorinate swimming pool water prior to discharge. In cooperation with the appropriate County and appropriate.Water Management Organizations, an article on proper swimming pool discharge from residential pools will be developed (see BMP Summary Sheet le-1). This public education component will be further developed as outlined on BMP Summary Sheet 1 c-3. f - 1 wq-strni4-50 23 3/06 *Responsible Party for this AMP: Name: SUS Hoyt Department: City kd�!lld, !! Gm Phone. 1-2 5 O! . ( : E-mail: Shoyt@lakeetino.org [ 'i£ catesak£UUa£D/eir Failure «complete anyrequ%edfi£U will result Wiael6no the applr «/edite to incompleteness. f . [.. [ , (� (` (- �\ { ° � . {° (: ( , {\ [ . , . - { [ E . . [ . »q-stm45 2 0 q . V � BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 3-ILLICIT DISCHARGE DETECTION AND ELIMINATION { Unique BMP Identification Number: 3f-1 *-BMP Title: Source Water Protection Area 5 *BMP Description- : The City is in the process of completing a Wellhead Protection Plan (WHP) with the Minnesota Department of Health. This report will discuss the vulnerability status of the Drinking Water Supply Management Area (DWSMA) for the City's two water supply wells. Both DWSMA's have been classified as moderately to highly vulnerable in part because of the possible susceptibility to contamination from surface and near surface contamination sources.The report will provide action plans to effectively manage and prevent groundwater ' pollution in the DWSMA's. In addition to following action plans described in the Wellhead Protection Plan, the City will use the MDH document Evaluating Proposed Stornzwater Infiltration Projects in Vulnerable Wellhead Protection Areas as a guidance document for projects that may pose a potential risk to groundwater quality in the Well 1 and Well 2 DWSMA's. � l *Measurable Coals: 0 Follow stormwater protection measures as outlined in the WHP report, Part 2, when approved. ( + Evaluate the effectiveness of stormwater protection on an annual basis as stated in the WHP report and update objectives as needed. I ' t *Tirneline/Implementation Schedule: 2008: • Part 2 of the Wellhead Protection Plan will be completed and approved t 2009 -2010: 0 Evaluate and update stormwater protection measures as needed in the WHP report * Follow well protection guidelines to educate residents in the Well 1 and Well 2 vulnerable areas. Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 t E-mail: Shoyt@lakeelmo.org it *Irulicates a REQUIRED field. s wq-str114-50 25 3/06 BMP Summary Sheet MS4 Name: City of Lake Elmo (' Minimum Control Measure: 4-CONSTRUCTION SITE STORMWATER RUNOFF CONTROL Unique BMP Identification Number: 4a-1 *BMP Title: Ordinance or other Regulatory Mechanism *BMP Description; The City will update and adopt ordinances and policies to reflect erosion, sedimentation and pollution control plan, Also include certification requirements for staff. Reline necessary procedures for the submittal,review, approval, and enforcement of erosion and sediment control plans. l._ *Measurable Goals: City site certification and inspection results, r ' l_ *Timeline/Implementation Schedule: 2006: Adopt and enforce the City ordinances with respect to erosion and sedimentation control. 20 0 7 -2010: • Continue enforcing compliance measures adopted by the City, Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Plione: 651-233-5401 E-mail: Shoyt@lakeelmo.org ; '1'Indicutes a REQUIRED field. Failure to complete any required field will result in rejection of the application clue to incompleteness, wq-strin4-50 26 3/06 BMP Summary Sheet MS4 Name- City of Lake Elmo Minimum Control Measure: 4-CONSTRUCTION SITE STORMWATER RUNOFF CONTROL Unique BMP Identification Number. 4b-1 *BMP Title: Construction Site Implementation of Erosion and Sediment Control BMPs 44BMP Description: In cooperation with the appropriate County and appropriate Water Management Organizations,the City will select appropriate BMPs, within 6 months after extension of the permit, that are found to be the most effective in keeping erosion tinder control and containing sediment on the construction site and off the streets. These BMPs will be in an Erosion and Sediment Control Handbook and/or the Engineering Standards Manual that the City gives to all f builders, contractors, and developers. Once selected, periodically, the City will host a BMP Workshop for all local builders,contractors, and developers. '`Measurable Goals: 1) In cooperation with the appropriate County and appropriate Water Management Organizations, 10 BMPs will be selected within 6 months after extension of the permit. 2) The development of the Erosion and Sediment Control Handbook. I3) The number of builder/contractor/developer workshops held. 4 *Tinieline/Implementation Schedule: �^ 2008-2009: • Select appropriate sediment and erosion control BMP's within 6 months after extension of the hermit, and start the implementation of these BMP's. 2009 - 2010: • In cooperation with the appropriate County and appropriate Water Management Organizations, hold {� periodic workshops. 4 • Evaluate the addition of new BMPs that the BMP Review Board feels are justifiable. Specific Components and Notes: *Responsible Part for this BMP: p y Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeeltno.org 'Indicates a REQUIRED field. Failure to coi plete any required field will result in rejection of the application clue to incompleteness. i I wq-stnn4-50 27 3/06 BMP Summary Sheet M84 Name: City of Lake Elmo Minimum Control Measure: 4-CONSTRUCTION SITE, STORMVdATER RUNOFF ( ` CONTROL Unique BMP Identification Number: 4c-1 :BMP Title: Waste Controls for Construction Site Operators *BMP Description: The City will develop and implement a program to control and eliminate construction site waste that may impact storniwater runoff. This program will address construction entrances,vehicle maintenance, equipment washing areas,and proper waste disposal. L f ' L *Measurable Goals: • The reduction of site wastes with respect to construction. • Identify requirements for construction site operators to implant appropriate control of construction site 4 waste. • Frequency of inspection and maintenance activities. L � *Time]i ne/I mplementa tion Schedule: i 2006: • Develop a plan to control and eliminate construction site waste. 2007 - 2010: • Implement plans to control and eliminate site waste. Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator ti Phone: 651-233-5401 E-mail; Shoyt@lakeelmo.org *Indicates a REQUIRED f eld. Failure to complete any required field will result in rejection of the application due to incompleteness. wg-strm4-50 28 3/06 t .. BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 4-CONSTRUCTION SITE STORMWATER RUNOFF CONTROL Unique BMP Identification Number: 4d-1 *BMP Title: Procedure for Site plan Review *BMP Description: The City will include in any preconstruction activity, a review of regulated construction site plans submitted by the developer/builder/contractor for the implementation and routine maintenance of sedimentation and erosion controls that incorporate consideration of potential water quality impacts before any construction begins. The Lake Elmo process for permitting construction activities will incorporate site plan reviews for erosion control compliance. The { plans will be reviewed according to the City's erosion control standards. t *Measurable Goals: • The number of site plan reviews. • The number of reports of storm water noncompliance incidents at construction sites. 1 *Timeline/Implementation Schedule: 2006: I Begin reviewing preconstruction site plans. 2007 - 2010: Continue review of site plans. Specific Components and Notes: { "Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org Midicates a REQUIRED field. Failure to complete any required field field will result in rejection of the application due to incompleteness. ti I { wq-strnA-50 29 3/06 F ik BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 4-CONSTRUCTION SITE STORMWATER RUNOFF CONTROL Unique BMP Identification Number: 4e-1 t *BMP Title: Establishment of Procedures for the Receipt and Consideration of Reports of Stormwater Noncompliance *BMP Description: L : The City will refine the inspection program for inclusion of procedures for receipt and consideration of reports of non-compliance or other information on construction related issues submitted by the public. j i f . I k- s *Measurable Goals: r • Dumber of complaints about construction procedures. 1_ *Timeline/Implementation Schedule: 2006: • Develop a plan to evaluate construction SWPPPs and complaints about construction activity within 6 motaths after extension of the permit. 2007 -2010 • Implement the plan. Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Slioyt@lakeehno.org *Indicates a REQUIRED fielel. Failure to complete arty requireel field will result in rejection of the application due to incompleteness. c wq-strin4-50 30 3I06 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 4-CONSTRUCTION SITE STORMWATER RUNOFF CONTROL Unique BMP Identification Number: 4f-1 *BMP Title: Establishment of Procedures for Site Inspections and Enforcement *BMP Description: The City will ensure construction sites operate in accordance with this SWPPP and the project Specific construction SWPPP. The City will review SWPPP site plans for construction activities, including the following: I. Description of the activity,proposed timetable, amount of area disturbed, and any outfalls to the storm conveyance system or water body 2. Map or drawing of the site showing the boundaries, soil disturbance limits, stormwater drainage pattern, location of receiving waters and/or storm inlets, storage areas for materials, and stormwater management controls 3. Description of the method of storage, disposal, and handling of materials which have the potential to be released with stormwater 4. Description of the BMPs to control erosion and sedimentation during all phases of construction 5. Description of methods to address Sediment tracking on roads,recovering sediments, and spill prevention and response procedures 6. Site inspection procedure providing at least one inspection every 7 days and within 24 hours after any storm event of greater than 0.50 inches of rain per 24 hours period Site Inspection Records will be kept for the date and time of inspections, the name of the inspector, and the date and amount of last precipitation event. All incidents of erosion, sediment accumulation, or spills will be documented. The record will include the location and description of the incident,estimated quality of material or size of area affected, and a brief explanation of potential cause and remedial action taken. The City wilt develop an enforcement plan for non-compliant construction sites. 1 � I f *Measurable Goals: l • Steps to identify procedures for site inspections. • Steps to identify procedures for enforcemcnts. { • Number of enforcements implemented, following inspections. 17imeline/Implementation Sclxedule: 2006: • Review procedures for site inspections and enforcement of control measures. 2007: • Educate contractors. 2008 - 2010: + Develop enforcement action steps. • Evaluate the procedures and implement improvements. • Develop a program for special waters of concern to the community. wq-strm4-50 31 3/06 Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone, 651-233-5401 E-mail: Shoyt@lakeeltno.org *Indicates a REQUIRED field• failure to complete any required field will result in rejection of the application clue to inco177pletenes8. ' f • f I: F L 1. wq-strm4-50 32 3/06 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 5-POST-CONSTRUCTION STORMWATER MANAGEMENT IN NEW DEVELOPMENT AND REDEVELOPMENT Unique BMP Identification Number: 5a-1 *BMP Title: Development and Implementation of Structural and/or Non-structural BMPs *BMP Description: Post-construction stormwater management in areas that have recently undergone construction (new development or re-development) is necessary because runoff from these areas significantly impact surface water quality. As runoff flows over areas altered by construction,it picks up harmful sediment and chemicals which the then deposited in surface waters. A second type of post-construction impact is the interruption of natural infiltration of rainfall by the { new impervious surfaces associated with construction projects. The result is increased volumes of stormwater reaching streams. The end result is the scouring of river systems and flooding. A combination of structural and non-structural BMPs work well foi-managing post-construction stormwater quality, volume, and rate. I *Measurable Goals: 1) Update wet detention pond design standards annually along with investigating new post-construction structural BMPs. 2). Investigate post-construction ilon-structural BMP design standards. 3) Update the storm sewer map periodically. Timeline/Implementation Schedule: • 2006-2010: Review and update structural and non-structural BMPs. Continue to conduct reviews of all construction projects With stormwater management being a major component and focus of the review, Specific Components and Notes: 1) All wet detention ponds should be designed to NURP Standards. 2) The wet detention ponds should release stormwater at a rate that is consistent with the City ordinance. i 3) Review site plans to make sure that infiltration of stormwater is investigated and incorporated when feasible. :NResponsible Patty for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeehno.org *Indicates a REQUIRED field. Failure to cony.71ete any required field will result in rejection of the application due to incornpleteness. j wq-strin4-50 33 . 3/06 BMP Summary Sheet MS4 Name: City of Lake Elmo L_. Minimum Control Measure: 5-POST-CONSTRUCTION STORMWATER MANAGEMENT IN NEW DEVELOPMENT AND REDEVELOPMENT ' Unique BMP Identification Number: 5b-1 *BMP Title: Regulatory Mechanism to Address Post Construction Runoff from New Development and Redevelopment *BMP Description: Measures for Controlling Post-Construction Runoff: With respect to development and re-development projects, the City will regulate past-construction runoff in accordance with their procedures. In addition, the City will review its procedures to limit surface runoff volumes and reduce water runoff pollutant loadings, The City will revise and adopt, as necessary, additional ordinances with respect to controlling post-construction runoff. : *Measurable Goals: • The number of ordinances the City adopts. • The number of BMP measures the City develops. *Timeline/Implementation Schedule: 2006: • Adopt or revise, as necessary,ordinances with respect to controlling post-construction runoff. F • Develop internal quality control measures. 2006 -2010: • Continue compliance measures. Specific Components and Notes: 'Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator 1 y Phone: 651-233-5401 E-mail; Shoyt@lakeeIttio.org "Indicates a REQUIRED field. Failure to complete an), required field will result in rejection of the application clue to incompleteness. #f 4 w wg-strm4.50 34 3/06 { 1 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 5-POST-CONSTRUCTION STORMWATER MANAGEMENT IN NEW DEVELOPMENT AND REDEVELOPMENT Unique BMP Identification Number: 5c-1 *BMP Title: Long-term Operation and Maintenance of BMPs 1 *BMP Description: BMP Inspection & Maintenance Program: 1 ' The City will develop an inspection and maintenance program to ensure the effectiveness of structural and non- structural post-construction stormwater control BMPs. All structural BMPs will be inspected for continued effectiveness and structural integrity at regular inspection intervals. Inspections will document whether the BMP is performing;correctly, note any damage to the BMP, and repair any damage to the BMP. Long-term performance of non-structural BMP's will be evaluated based on the effectiveness of post-construction ordinances and education programs. I *Measurable Goals: « The frequency of inspection and maintenance provided. • The number of problems identified and remedied. J *Timeline/Implementation Schedule: 2006; « Evaluate the inspection and maintenance program. 2006-2010: « Implement the inspection and maintenance program. Specific Components and Notes: Jl l *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelano.org Ilbuli.cates a REQUIRED field. Failure to comaplete any requi.redfield will result in rejection of the application due to incompleteness. wq-strm4-50 35 3/00 BMP Summary Sheet MS4-Name: City of Lake Elmo Minimum Control Measure: 6-POLLUTION PREVENTION/GOOD HOUSEKEEPING Unique BMP Identification Number: 6a-1 *BMP Title: Municipal Operations and Maintenance Program l- *BMP Description: Storm Drain System.Maintenance Program: The City has in place an on-going storm drain inspection and cleaning program to reduce pollutants, trash, and debris. At a minimum, yearly cleaning and inspection includes storm drain grates, detention pond, pump station, catch basins, and other appurtenances. Based on inspection results, or repairs, measures will be determined for proper operation. In cooperation with the appropriate County and Water Manageanent Organizations, the City will use the education efforts outlined in BMP Summary Sheet 1 c-6 (Education Program: Pollution Prevention/Good Housekeeping for Municipal Operations) to provide training for City personnel responsible for open space maintenance, vehicle and building maintenance, and stormwater conveyance maintenance. r ` "Measurable Goals: • The number of inspections - • The amount of trash, sediment,or other pollutants removed during cleaning • See BMP Summary Sheet lc-6 for Measurable Goals concerning municipal operations and maintenance . training for City personnel, r *Timeline/Lnpleaaieaatation Schedule: ti See l3MP Summary Sheet d e-6 for Timeline/Implementation Schedule concerning municipal operations and f; maintenance training for City personnel. 2006- 2010: • Continue the storm drain inspection and cleaning program • Evaluate the program periodically and make modifications, if necessary Specific Components and Notes: *responsible Party for this BMP: Naive: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@1akeelmo.org *Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application due to i1?c01?tp1eteness. wq-strnA-50 36 3/06 1 BMP Summary Sheet MS4 Name: City of Lake EImo Minimum Control Measure: &POLLUTION PREVENTION/GOOD HOUSEKEEPING Unique BMP Identification Number: 6a-2 `BMP Title: Street Sweeping" `BMP Description: The City will review their current Street Sweeping Program for all City owned and paved streets and parking lots and revise the program as necessary. The City sweeps these impervious surfaces once a year, in the spring. Street sweeping will begin as early in the spring as weather allows. I , *Measurable Goals: ' 1) Review the Street Sweeping Program: 2) Research, as necessary, available street sweeping equipment; evaluate the costs of purchasing equipment vs. contracting services for street sweeping. 3) Revise the Street Sweeping Program, as necessary. `Timeline/Implementation Schedule: 2006 - 2010:... • Continue to sweep all City owned and paved streets and parking lots each spring. f 2008-2010: I • Evaluate program effectiveness each season and make changes, if needed. • Revise the program, if needed, to include necessary changes and develop a schedule for the implementation of these changes. Specific Components and Notes: 1) The City (or contracted service)will sweep all paved City streets and parking lots at least once a year in the spring. The City will track and record the amount of street sweeping wastes collected to assist in the evaluation of this additional street sweeping. ' Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org *Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application due to i.ncontpleteness. 1 1 wq-strm4-50 37 3/06 BMP Summary Sheet MS4 Name: City of lake Elmo „ Minimum Control Measure: 6-POLLUTION PREVENTION/GOOD HOUSEKEEPING Unique BMP Identification Number: 6b-2 *BMP Title: Annual Inspection of All Structural Pollution Control Devices *BMP Description: Inspect annually all structural pollution control devices, such as trap manholes, brit chambers, sumps, floatable skimmers and traps, separators, and other small settling or filtering devices. f , C f" *Measurable Goals: • Number of inspections and pollution control devices inspected. * Number of non-functional pollution control devices inspected. i 4-Timeline/Implementation Schedule: 2006- 2010: • Review the Pollution Prevention Plan (annual inspection procedures). L • Perform annual inspections. • Review maintenance schedules for BMPs. 2010: • Assess the compliance rate for BMP maintenance schedules. Specific Components and Notes: *Responsible Party for this BMP.- Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelnio.org *hadicates a REQUIRED field• Failure to complete any required field ivill result in rejection of the application due to incompleteness, wd-strm4-50 38 3/06 BMP Summary Sheet I MS4 Name: City of Lake Elmo Minimum Control Measure: 6-POLLUTION PREVENTION/GOOD HOUSEKEEPING Unique BMP Identification Number: 6b-3 I' *BMP Title: Inspection of a Minimum of 20 percent of the MS4 Outfalls, Sediment Basins and Ponds Each Year on a Rotating Basis *BMP Description: This Best Management Practice (BMP)is required for inspection of minimum 20 percent of MS4 Outfalls, 1 Sediment Basins and Ponds each year on the rotating basis, so that all are inspected over the entire permit period (5 years). 1 4 ' I ' l *Measurable Goals: • Number of inspections conducted each year, percent of total. • Number of M84 Outfalls, Sediment Basins and Ponds each inspected each year. I *TimelinelImplementation Schedule: 2006: • Set-up a program and procedures for inspections. 2007 -2010: f • Evaluate the inspections procedures. l • Continue inspections. Specific Components and Notes: is *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org *Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application due to incompleteness. wq-strm4-50 39 3/06 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 6-POLLUTION PREVENTION/GOOD HOUSEKEEPING Unique BMP Identification Number: 6b-4 *BMP Title: Annual Inspection of All Exposed Stockpile, Storage and Material Handling Areas ' BMP Description: This BMP requires all stockpiles such as salt, lumber, parts, and coal piles to be inspected annually. Some L 1 temporary stockpiles such as topsoil from construction activity would not be inspected under this requirement but would be required to be inspected in accordance with construction permits, ordinances, or policy. Stockpiles such as salt which are used only seasonally but are used each year are not temporary stockpiles and would be required to be inspected under this requirement. As with all inspections, if patterns of maintenance become apparent, the frequency of inspections should be adjusted. L *Measurable Goals: • Sites identified for areas of all exposed Stockpile, Storage, and Material Handling Areas. • Number of inspections of all exposed Stockpile, Storage, and Material Handling Areas. *Timeline/Implementation Schedule: 2006: • Develop a Pollution Prevention Plan (annual inspection procedures) with specific BMPs. L 2006-2010: • Establish a maintenance schedule for implemented BMPs. * Ascertain the compliance rate for maintenance of implemented BMPs. Specific Components and Notes: *Responsible Party for this BMP: ' Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org "Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application clue to incompleteness. T L wq-strin4-50 40 3/06 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: 6-POLLUTION PREVENTION/GOOD HOUSEKEEPING Unique BMP Identification Number: 6b-5 ! *BMP Title: Inspection Follow-up Including the Determination of Whether Repair, Replacement, or Maintenance Measures are Necessary and the Implementation of the Corrective Measures *BMP Description: Based on the inspection,determine if repair,replacement, or maintenance measures are necessary for proper 1 operation and to prevent environmental impacts, such as erosion.The necessary measures shall be completed as soon as possible, usually during the same year as the inspection. When it is not practicable, the reasons and a ( schedule for completion shall be submitted in the annual report. 1 . l *Measurable Goals: Number of recommendations made following the inspections Number of follow-up actions taken after the inspections "Timeline/Implementation Schedule: 2006: • Develop a plan (annual inspection procedures) for inspection follow-up. 2006—2010: • Continue inspections and followup maintenance. • Evaluate inspection procedures annually. 2010 • Ascertain compliance rate for BMP maintenance schedules. Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelmo.org '--Indicates a REQUIRED field. Failure to complete any required field will result in rejection of the application clue to incompleteness. I : wq-strn14-50 41 3/06 BMP Summary Sheet MS4 Naine: City of Lake Elmo .Minimum Control)Measure: 6-POLLUTION PREVENTION/GOOD HOUSEKEEPING Unique BMP Identification Number: 6b-6 *BMP Title: Record Reporting and Retention of All Inspections and Responses to the Inspections *BMP Description: Summarize the results of outfall inspections in the annual report and include the dates of inspection and date of completion of major additional protection measures. Keep records of inspection results,date, antecedent weather conditions, sediment storage and capacity remaining, and any inaintenance performed or recommended. t I1 la *Measurable Goals: • Number of records maintained. • Any relevant inspection - lab results. • Any maintenance performed or recommended. • Sediment storage and capacity remaining. , *Tirneline/Iniplementation Schedule: 2006: • Develop a plan for record reporting and retention. 2007 - 2010: ' • Implement the plan for record reporting and retention. Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone, 651-233-5401 E-mail, Shoyt@lakeelino.org "Indicates a REQUIRED field, Failure to complete any required field will result in rejection of the application clue to in-completeness. lip . wq-strn4-50 42 3/06 . BMA' Summary Sheet MS4 Name: City of Lake Elrno Minimum Control Measure: 6-POLLUTION PREVENTION/GOOD HOUSEKEEPING l Unique BMP Identification Number: 6b-7 l *BMP"Title: Evaluation of Inspection Frequency *BMP Description: Keep records of inspection results,date,antecedent weather conditions, sediment storage, and capacity remaining, and any maintenance performed or recommended.After two years of inspections,if patterns of maintenance; I become apparent, the frequency of inspections may be adjusted.If maintenance or sediment removal is required I because of each of the first two annual inspections, the frequency of inspections may be adjusted. If maintenance or sediment removal is required because of each of the first two annual inspections, the frequency of the first two annual inspections, the frequency of inspection shall be increased to at least two(2)times annually or more frequently as needed to prevent carry-over or washout of pollutants from the structures and maximize pollutant removal. If maintenance or sediment removal is not required because of both of the first two annual inspections, the frequency may be reduced to once every two years. 'Measurable Goals: • The number of inspections and results summarized each year. r ` • Any maintenance performed or recommended. *Timeline/Implementation Schedule: 1 2006: • Establish procedures for annual inspections. 2007 - 2010: • Implement annual inspections. • Evaluate the inspection frequency and make adjustments accordingly. Specific Components and Notes: *Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone: 651-233-5401 E-mail: Shoyt@lakeelrno.org '`Indicates a REQUIRED f eld. Failure to coinl.4ete aizy required field will result in rejection of the apl)lication due to incompleteness. wq-strnA-50 43 3/06 BMP Summary Sh eet MS4 Name: City of Lake Elmo Minimum Control Measure: IV.D Section 303(d) listings Unique BMP Identification Number: IV.D-- I *BMP Title: Impaired Waters Review Process BMP Description: In cooperation with Valley Branch Watershed District (VBWD), Brown's Creek Watershed District(BCWD) and South Washington Watershed District (SWWD), the City of Lake Elino will create a review process that identifies L all discharges from the City's MS4 system to impaired waters, as defined by the current USEPA approved 303(d) list. ' The review process will include the following: ► Identification of impaired waters within the jurisdictional boundaries of the City. • Identification of all potential storinwater discharges to impaired waters using data from the City's storm sewer maps and field surveys. " • Delineation of watershed areas that contribute to the above discharges. , • Evaluation of the hydrology, land use and other characteristics of the watershed areas that may impact the impaired water as a result of a storinwater discharge from the City's storinwater system. • Consideration of timing and short and long terin costs. Based on the results of the review process, the City of Lake Eli-no will determine if any changes to the existing stormwater system or BMPs are heeded to minimize the impact of discharges to the impaired waters. If such modifications are deemed necessary, the City will modify the SWPPP and submit those modifications to the MPCA. All assumptions, reasoning,and justification used to reach a conclusion will be documented in the decision making process. Documentation related to the impaired waters review process will be filed with all other records associated with the MS4 perinit. r *Measurable Goals: • Determine what processes are in place and what has already been accomplished that will help meet these permit conditions L • Prepare an inventory of all impaired waters within the jurisdictional boundaries of the MS4, as well as those outside these boundaries likely to have an impact as a result of receiving storinwater discharge from the City. • Prepare a neap that includes all impaired waters that the City discharge may impact, all City discharge points that may impact these waters, and delineated watersheds that may contribute to the impairment • Complete a written overview of the conclusions reached through the review,including the decision making process used to determine what SWPPP revisions may be needed « Prepare a projected schedule and timeline to incorporate any necessary changes into the SWPPP *Tirrieline/Implementation Schedule: 2008: • identify what tasks have been completed to meet the In cooperation with VBWD,BCWD, and SWWD, i y � ks ! p requirements of section IV.D. of the MS4 General Permit. • In cooperation with VBWD,BCWD, and SWWD, identify impaired waters receiving impacts from storinwater discharges from the City and locate discharges. • In cooperation with VBWD, BCWD, and SWWD,develop a map that includes all impaired waters that the City discharge may impact, all City discharge points that may impact these waters, and delineated watersheds that may contribute to the impairment L wq-strin4-50 44 3/06 2008-2009: « In cooperation with VBWD,BCWD, and SWWD,complete an evaluation of hydrology, land use, and other watershed characteristics for watersheds that contribute runoff to impaired waters. 2009-2010; • . The annual report Will include an overview of the impaired waters review and any changes to the SWPPP that have been deemed necessary through this review process. • Review changes to the 303(d)impaired waters list and conduct a review of additional listed impaired waters likely to be impacted by the City's stormwater discharge. Specific Components and Notes: The unpaired waters review process will be reassessed annually over the course of the permit cycle. As new 303(d) lists with additional impaired waters listed are published in the future, Lake Elmo will review changes to the list and conduct the necessary review of additional listed waters likely to be impacted by the City's stormwater 1 discharges. When an USEPA approved TMDL is finalized, the City of Lake Elmo intends to fully comply with all limits and requirements set forth in the TMDL in accordance with the schedules outlined in the TMDL and the MS4 Permit. Responsible Party for this BMP: Name: Susan Hoyt Department: City Administrator Phone.: 651-233-5401 ( ' E-mail: Shoyt@lakeelmo.org 4 . l r 1 wq-strm4-50 45 3/06 BMP Summary Sheet MS4 Name: City of Lake Elmo Minimum Control Measure: IX. Appendix C. Part B. Unique BMP Identification Number: IX. B. ( 'VBMP Title: Discharges to Waters with Restricted Discharges Assessment *BMP Description: i In cooperation with Valley Branch Watershed District(VBWD), Brown's Creek Watershed District (BCWD) and South Washington Watershed District(SWWD), the City of Lake Elmo will create process that identifies all discharges from the City's MS4 system to outstanding resource value waters(ORVW), as defined by the current l Minn. R. 7050.0180, subp. 6,6a or 6b list. The review process will include the following: f • Identify all discharges to the prohibited or restricted water(s). • Map watersheds from the identified discharge points and routes to the ORVW. l 0 Evaluate changes in the watersheds, projected out at least through 2020. This evaluation may include changes in Iand use, hydrology, modifications to the MS4 system or other changes. j • Determine if there arc feasible and prudent alternatives to the discharge, such as diversion from the i ORVW watershed, infiltration, or other alternatives. Based on the results of the review process, the City of Lake Elmo will determine if discharges to the ORVW can be eliminated. If the discharge cannot be eliminated entirely, the City will propose BMPs that will allow the existing high quality of the ORVW wafter to be maintained, which will preserve the wilderness, scientific, recreational, or other special characteristics that make the listed waters an ORVW. If such modifications are deemed necessary, the City will modify the SWPPP and submit those modifications to the MPCA. *Measurable Goals: • Determine what processes are in place and what has already been accomplished that will help meet these permit conditions. • Prepare an inventory of all discharges within the jurisdictional boundaries of the MS4 likely to have an impact on an ORVW as a result of receiving storrnwater discharge from the City. • Prepare a map that includes all City discharge points that may impact these waters, and delineated watersheds that may contribute runoff to the ORVW. 1. J • Prepare a projected schedule and timeline to incorporate any necessary changes into the SWPPP I *'Timeline/Implementation Schedule: 12009: • Identify what tasks have been completed to meet the requirements of Section IX. Appendix C. Part B of the MS4 General Permit. • Identify all discharges to the prohibited or restricted water(s). • Develop a watershed map of identified discharge points and routes to the ORVW waters. • Complete an evaluation of hydrology, land use, and other watershed characteristics for watersheds that contribute runoff to the prohibited or restricted water(s), projected out at'least through 2020. 2010: • Propose BMPs, if required, that will allow the existing high quality of the ORVW water to be maintained wq_strm4-50 46 3/06 tl ! Specific Components and Notes: L_ *Responsible party for this BMP: Name: Susan Hoyt Department: City Administrator l_ Phone: 651-233-5401 E-mail: Skyt@lakeelmo.org * E UIRED veld. Failure to cony Clete any re aired geld will result in rejection of the application due *Indicates a R Q ,�` 1 �! .� to incoinpletenesr. , Ij wq-strm4-50 47 3/A6 APPENDIX E 1 I SURFACE WATER (603� HU GEFARV OBJECnVE: The surface water fund is responsible for recording expenses related to the cost, maintenance, and replacement of the city surface water system while derlving revenue from user charges. i ACCOUNT HIGHLIGHTS: RIVfNVES ME ace Water gales (37100) City property owners are charged annual basis for the surface water utility: LXP1:i116£S Full Tune Salaries (41010) See Appendix 1 pArsonnel compensation distribution. Comprehensive Planning (4302O) Expendit or contracted surface water planning as part of a comprehensive plan up on as required by the Valley Brunch watershed. 1 =:p Enillneerind Services (43030) a itures for contracted engineering services related to surface water. Contract Services (43160 1 s expenditures for financial consulting services and outsourcad awounUng ncluding accounts payable, payroll,and utility billing, =:1 De reclat on Ex e 4 0) Stra lght•line depreciation to calculated on the water system and rslat assets. Street Swe 010) Expenditures for contracted street sweeping services related to surfs w to I 0771ER C46N AU11s'LOW Aaaulsltlon of Cepltal Assets Surface Water capital assets including the following: 1 + None for 2009 Due to the full accrual method of accounting In the surface water fund, those amounts ' wlli ultIMA1161y be classified as capital assets, and no capital outlay expense will be recorded. Capital assets w111 be depreciated each year based an their estimated useful lives on a stralght line basis. Y For a detailed listing of the city's five year projected capital uses, sae the Capital improvement I� Plan soctlon of this document. . 8.12 t: INDICATOR 2tftl8 Street sweeping miles 66.3 mites plus parkilig Iotapublic iaaliitles Emlon oon&ol Wmings 8 Qe"lo er meatings an erosion t Catch basins 762 F Fil3rad end sedtions 605 Manholes 62 py a 26.4 miles Number at propartles being served 31196 I` 4 i I 1, F 1 i �'1 b at `' t 1 ' ruty of Lase f7fne �,� ffudtat 2000 4 ! ` 209E 2008 200D 2099 2007 2007 Amtadsd YUMO•Dala prcuminar7 102000 i AwunikumDu fmtcHptfan Rudtal A tusl Dud st 07 15 08 Rud of Chan 4 Ipertdto Wattr J DAKAtt!ftatronues I 00340000M?I00 Wma watrr MAy Wes 675,00E 013e M _61151000 6100382 612R OOO 4.3% 111 low owagnt Rh"Utf 676,000 9138,002 81YE OOa 6100,392 6120,000 4.3% 9 owalhrt EADmu l�t![onrtPl$ttattt9 00"P84 500.41010 0`0141ma60"Its 933,200 933,200 938,409 418,89t 930,371 .21.0% 003-100.0500-41210 pERAConlrroutlons 92,075 62,076 32,600 81,105 02,050 •10.0% 003.400-03DO4121D ►ICACatttttlutlo84 82,050 62,040 112,385 811171 $1,663 .21,09E 003.49"H041230, I1rdlcuat nbibutfuns "St $461 aids 8274 9440 •21,1% f 0034s0.05DOd1300 NtaMDcnWLuur=4 68,ia0 60,080 08,008 63AI0 60,060 40.24% (1 603.4MA0041810 waMrrr wacpcnttuoit 61,30E $988 91,472 6000 51831 4,0% total pertanntl9tttfu4 640r15B $48,702 054.051 920008 642 32E •21.79: EuDptlet 00 3-490-0 5 004 2 000 OnIcaEuDptka $700 $030 91,E00 8 61,000 J33% 1 M3.490.930042270 IM11I'Eptrm 64:M BUDplla 62,600 SZO2 62.300 t 61,13DO .40.09E 003.490,0500-424DO 8m4 Toole&41acr Clufpmtnt 01,D00 6o $1,000 811000 0.0% 003-490.9a0045300 ta;ratme&A Other Than Ofdgc 82,60o 60 810,000 Mow 1�_ t0 90 T*WSupp(tet 16,700 Et,141 eta 60211 ES 00 •70,7% Other t. vIceA and Ctwtu A OD3d80-0500.43020 Campr4E"the Pknntnt 9D 60 60 $40,000 WA E03,111"H0-03MD ExtincoisSffr41nti 00,000 929,182 640,000 $20,200 $39.000 -a 4% 8034904500.43150 Cantrtd 9trlkat 90 t0 90 910,000 WA ` 60,141N"50"3160 [radon Lan" 93,000 62,ODD, t0 $2,000 0,0'A 003-4 0 0-0 5004 3 1 90 Dot w"Euppert U.000 63.ow 90 411000 .00.7% 803-4900ED0.4322D MiIAt4 01,170 SU 0 41,500 09DO 91,200 .20,D% 003.40"800.43320, D4D7t41Atlan fipentc• 90 0 92,500 So $3,000 20,o% 6D3498.0500-44010 Urml Swupfn` 02,900 t $16,212 810.011 012,60D�I 603-4D&DOOD-44030 0epdrr/1lAtnl Not Wd0 62,600 6o 53,000 60 $3,000 0.0% 603.4D"300-443D0 ktece0uuautEcgenste a5 Sa 11,000 60 $500 4000% 003.40"500.44370 tantermu A Ttdning Sao() MO al,ioo �^�9{y20D r<O.RIS lTow Other Urifus and Gloria E 0 931 894 908,712 338 8M 9112,400 03.6% fetal altratlnt Expuuel _ 26 67R'So0 9137,703 605590 0Y50,22E IA,O% Op(MlIng Inwmt(Lae$) 9B72p f 50,,284 {6YSrT03! 640_,7_DI___ kaneptrat(rtt ItAtenurA 003-CO 000-3620 Interest cq tmar 60 (9a,301) (91,800) 50 (91IWO) NIA ttt 601-M00000-00 23 1 CantrfO.atfda�\ Aa 60 114,817 80 60 90 NIA TOW Noesapt d"I1elrnuts � to 09,516 at 00 60 (6t,000) _ NIA Trantlera 063.400-D50047200 Trtnstrr Out 6E,009 So _ 9O 90 60 N/A MAI Trantier4 93,000 60 40 90 to NIA ChantaIn NilMU14 94,026) 908,8D2 (824.2031 &A01791 {8,10,225) JA Ofhtt Cash Oat WW ' NIA k4ulafda3 of Cipher!Attsts 60 to 90 to 0o NIA • Nar}CAM term kt4 Aeaata ! N0A44a11,BeginnfatalVeit (d5II,108) (636,168) 833,090 $33,090 99.1133 .73.3% War Period Adjumval t0 122,402 90 90 90 NIA NM f2ttngo In Nit""IA _ {91,0SA) 66a,fm (624,203) 040 701 pltl p51 NIA Not Awls,Ending of Year {992,tB0)W 6a 7,a90 6P�93 w® 179,909 t630,342? •444.1% I I ' 41 I {' G.t0 i I 1 ' CAPITAL IMPRO ENS' PLAN 2009 to 2013 M PURPOSE: The city's flv&year Capital Improvement Plan (CIP) Is a summary of projects and equipment that are projected over the next flue years, The CIP represents a plan for the future. This is a planning document and Is revised on an annual basis, The CIP does not provide a specific funding formula for these projects or equipment. This will be part of a specific decision making process when each item Is being considered to move ahead. For example, the Capital Acquisitions fund may be the appropriate fund for a piece of equipment such as a fire truck, but this may require the city to Issue debt for the purchase and potentially increase the local property tax levy to pay for the debt. The city has various areas in which caplttel spending and budge tin used:le i • Parks(park and trail lmprovoments and related equlpm costs) • infrastructure(including the Street Improv4rpni( Pro • Village Capital Acquisitions (capital mwA lnerynt, vehicles, office l equipment, and minor bulldtn$improvemevernmental funds) • City Facilities (major buildings and b tdovements for governmental funds) Utifitlea (including capital machine quipment, vehicles, office equipment, buildings, and Infrastructure for a r, Sewer, and Surface Water enterprise funds) The CIP carries no approprlatlon y, but is approved by the city council and used l In the clty's overall financial , The CIP Is funded through various means, ! Including existing fund bat not assets, operating transfers, grants and alds, 1 special assessments, user ,debt Issuance,or other sources. t Its OCESSI ICI During the b recess, department heads submit their proposals for the CIP to the City A r or. Department heats requests are modified by reviewing expected sources n along with the proposed uses of funds. Additionally, the effect of capital Im vements on the operating budget Is weighed. Total uses for the first year of the CIP are then allocated to The various next-years capital projects expenditure budgets(and any other funds,be, enterprise), The process for developing the GIP Includes Input and review by. • the Maintenance Advisory Committee(MAC)on equipment needs for public works f and fire; �i + the Parks Commission for Input on upcoming park and trail priorlUes/heads; the Planning Commission for conformance of capital/Infrastructure projects to the comprehensive plan, The capital projects fund budgets along with the CIP are presented to the city council during the annual budget process, After review and modification, the council approves the CIP and capital projects fund budgets, which are then used as spending guidelines ' throughout the subsequent year. I � 7•i I 1 2009 TO 2013 BTRF.ET IMPROVEMENT PROGRAMt The proposed five year street Improvement program continues the city's history of t annually Improving road and street Infrastructure based upon condition and proximity wlthin the city,in order for each project to he efficient and cost effective. 6 I The street Improvement projects will vary depending upon the c ondlilcn of the street and associated storm sewer needs. They may range from total reconstruction,to reclaiming, to overlay. A pavement management plan has been completed for the street system. This provides an Inventory, condition assessment,recommended next Improvement, and priority ranking. Each year also Includes a maintenance program for crack settling and a sealcoating which Is mostly funded by the general fund Municipal State Aid (MSA) maintenance dollars. The city council is responsible for studying options and adopting a c nsistent financing plan for Implementing,these future projects over the coming yeus� r budget planning purposes only, the non-MSA Infrastructure projects reflected lc e 21W9 to 2013 tall' are based upon funding from fleneral Obligation (ti.0.) Hand paid through a 26% t, k assessment policy and 76% repaid through the city'& tax levy. MSA Infrastructure projects are also based upon tfnanclug fr ands, but repaid 75% from MBA dollars and 25%repaid through the city'&p levy. 2009 Street Impravemcnl Pralects; The 2009 street Improvement intrastructuh Jests are the priorlty projects that continue the street Improvement prcgra at a city has Implemented In the past. These streets were programmed for 200 ere deferred until a funding plan could be developed. (r. The program includes approxim mites of street Improvements chosen because i of a Thigh need and geographl to each other. This Includes the neighborhoods of Myron Ninon,Eden Parts, k 2A Addition,and The Forest. The prlority streets that re need of repair are: • 21st 8 `Manning Trail N to cul-de-sac(reclaim with localized subbase Cerro • 3rd N from Lake Elmo Avenue to cul-de-sac (reclaim with localized s rrectlon) are n The a nilfled for sealcoaling In 2009 la detailed In the CIA. Pavement ` preservation Is the most cost effective activity for extending the useful life of the street system. The city council Is responsible for determIning the financial mechanism for funding these street projects. For budget planning purposes only, the non-MSA Infrastructure projects reflected In the 2009 street Improvement program are based upon funding Q.O. Bonds repaid through a 25% assessment policy and 75% repaid through the olly's property tax levy. MSA Infrastructure projects are also based upon financing from Q.O. �! bonds,but repaid 75%from MBA dollars and 26%repaid through the clty's properly tax levy. i VILLAGE; The purpose of the Village project Is to plan and prepare for the development and potential redevelopment of the Village. All obligations and expenditures for the Village :y 7.2 1 project have been tracked and put Into the Village capital projects fund, The project Is being funded with a loan from General Fund reserves and a repayment schedulo for the loan has been established. The Village AUAft Is to be paid through fees chargW to developers. To Implement this policy,an ordinance will need to be adopted. There are examples of this type of fee(and related ordinances) to use to develop this. Fees and policies will be adopted to cover the coats assoclated with developing the Village. These policies should anticipate that the developers will cover costs moclated with developing the new Village. PARK DEMCATION, For 2009, proposed city park structures and Improvements, park signage, and trail Improvements total an estimated $259,000 (see the CIP detail). I All 2009 items will be financed by existing fund balance and park d lion toes. CAPITAL ACQUISMQNs: For 2009,capital acqulsltinns include upgrades toelean and 2, n 1 inn public works hock/dump truck, various Information pment, sound/video upgrades at City Nall,and contracted Capital Impro finance services. All 2009 Items will be financed by Wolin d balance with the exception of the `I sound/video upgrades, which will be fin b a cable commission grant. Future major capital acquisitions will likely req r sources or the Issuance of new G.O. 1 debt,which will likely he repaid by city y taxes. CITY FACILITIM, ! For 2009, no major gs or building Improvements are planned, 81to acquisitions and aonstru a new City Nall and a now fire station may nccur in the future, as determin y tt city council. Future major facility acquisitions will likely require the issu G.O. debt, which will likely be repaid by city property[.axes. r WATER: 1 A local wale tan Is being completed In 20D9. The water system requires an additional f ; well to assure service to existing properties on the wader system. Minnesota department of Health low interest loans are being explored as funding for water system needs to 1 satisfy contamination. Replacement water meters are also planned for 2009. Extending water service to the southwest area of the city for properties with PFC contamination above health based value is planned for the future, IJ A utility rate anWols and cash now proje0on will be madeted and reviewed by the city I coundl In advance of major water capital spending, SEWER: l The forcemain extenslon from 1.94 to 30th Street Is planned for 2010 if there Is a commitment from developers to cover some up front costa and it prondse of �I development. The pipe will be paid for by developers and beneficiaries of service. 7.3 I f�. C; An engineering sewer pion for the area south of I Street dedicated far sower in the comprehensive plan is scheduled for 2009 to 6e prepared for the first phase of the development south of 1a"Street In 2011. ; A Willy rate analysis and cash flow projection will be modeled and reviewed by the city council 1p advance of major sewer capltal spending, + ' SURFACE WA'TFtt: A surface water plan Is budgeted for$40,000 to he done in 2009. �•.' A utlitty rate analysis and cash flow projection will be modeled and reviewed by the city (` council In advance of major surface water capital spending, L RJ L r. OXIOOP 1 14 I• s f 7-4 �. I �� r$� �7 ��1��aMF�s'S F71�F�d13�F�h M�1�NM1�F�.tlti kh��tikF'3�1711�T 1 � � N N T YN N NNN i r I z hillg H99 I'll tin 1- i7 G If {xxQ�y ,,yppp 'd X�ts K`�� ^I 1 a� i fill fit aaa Ct .. � a � o 7a .� s s I i ' g E a a 7� 000 +' tl 4� }{�S A? Z =CQi xZ�KY fig HIE f�+�Y�+Ox MJ 9i � of Co�OGGGG� 19 i g milgMUH1 B YY:"zz xx Ing mmo ,I City q Gv, i Stillwater `C-iry-o 5 -- eights f ac 4 3' 2 g (�jF], Al1L I�AU,r11Rf r.tlf l i • ,r•'fR '" ''� � �rrarf wli. 1 i+r�r, rr `q0 L'ac 3f• F`Li.•,n.w31•p 4 )to1.) *; 12, bt3nrship I ITT city 0j, 13 j 17 ! t f1G 15 r 14 a�"• rryy '".. 19 — , r �f- n / i21 22 23 i �•, 4 hvest Lakeland �I wrYsltip ' lr•,..r.JW'" Lrr.,rnrr.r !� .- 6" g �i}-`,�- " • t I r 27 30 uq • " iF ! LrAA �IC J 35 q1 36 I 31 r, � `_��_•.. ♦O. .. -. �Y�1t�-. yes ._,F�_. .. :. fwnlrtn rcaa. -Ta City of FYoodbrtry I �- - ror:-STREET CA PITAL IMPROVEMENT PLAN MAP — a LAKE ELMO STREETS cllr or r!}1 �m Fvll !,tjppKIn1E CIP YEAR c� PRrLDt� 5 4uWlNlvorks evlroing 122E "'�ri— ' 2009 Suh!llyml.mt Fln SWI.- City Parke2010 K+a tlnr.OcteSer 1CC3 .. Got(Co.., - -- 2011 Lk.Elmo Rcglon.lg�•q-�A p Park�Rczervo 1Kyig Jl - 2012 RL schools "" nc ELas•uori,L�a•aaeos Lk- 2013 I APPENDIX F AGREEMENT FOR STORM WATER FACILITIES BETWEEN THE CITY OF OAKDALE, MINNESOTAr THE CITY OF LAKE ELMO, MINNESOTA, AND THE VALLEY BRANCH WATERSHED DXSTRICT THIS AGREEMENT is dated the 3rd day of December, 1996, and is entered into by and between the City of Oakdale, Minnesota, a municipal corporation located in Washington County, Minnesota, its successors and assigns, hereinafter called "Oakdale" , the City of Lake Elmo, a municipal corporati_dn located in Washington County, Minnesota, its successors and assigns hereinafter called "Lake Elmo" , and the Valley Branch Watershed District, its successors and assigns, hereinafter called the "VBWD" . 1. 0 Recitals. A. Pursuant to the terms of this Joint Powers Agreement, the parties wish to: r 1. establish a storm water drainage plan to guide the planning and construction of storm water facilities which will serve the property illustrated on Exhibit A attached hereto and incorporated herein ("Subwatershed" ) , and 2. define the specifics of the implementation and future modification of the storm water drainage plan that shall be applied to the construction, of joint projects in the Subwatershed. B. As used herein "Oakdale Site" means that part of the Subwatershed located on the west side of Ideal Avenue and "Lake Elmo Site" means that part of the Subwatershed located on the east side of Ideal Avenue. i C. The storm water drainage plan shall control the quantity and quality of the storm water that flows from the Oakdale Site through the Lake Elmo Site; and from the Lake Elmo Site into the VBWD storm water drainage system. D. In addition, Lake Elmo may wish to provide water and sanitary sewer to the Lake Elmo Site by purchasing such capacity from Oakdale in the future. 2.0 Terms and Conditions. NOW, THEREFORE, in consideration of the mutual covenants and undertakings herein expressed, the parties agree to and with each other as follows: A. scope of Agreement. The construction of a joint project, as hereinafter defined, within the Subwatershed and the reimbursement of costs associated therewith are governed by the terms of this Agreement. B. Term of Agreement. This Agreement shall commence on the effective date hereof and shall continue until the property located within the Subwatershed is fully, developed pursuant to each City's respective development regulations. C. Adoption of Plan. The parties hereby adopt the storm water drainage plan illustrated on Exhibit B attached and incorporated herein ("Drainage Plan" ) . The Drainage Plan illustrates the tributary areas, the conceptual location ....of., ponds .for water quality and .for storage,. and the approximate pond area and volume of storage. Maximum discharges rates are specified at critical locations. It 2 is intended that the Drainage Plan and the information contained thereon shall be the primary source of technical information pertaining to the design and construction of storm water facilities in the Subwatershed. D. Modification of Plan. 1. Approval Required. All proposals to amend the Drainage Plan shall be submitted for review to each of the parties. No amendment shall become effective unless approved by all of the parties. The parties agree to expeditiously review proposed amendments and shall not unreasonably withhold approval. 2. Critical Discharge Points. For purposes of this Agreement, the Drainage Plan illustrates two critical discharge points. a. Critical Discharge Point 1. Critical Discharge Point 1 is the rate of storm water flow from the Oakdale Site onto the Lake Elmo Site which is established as 185 CFS for a 100 year rainfall event. b. Critical Discharge Point 2_. Critical Discharge Point 2 is the rate of flow from the Lake Elmo Site into the VBWD drainage system which is established as 45 CFS for a 100 year rainfall event, and is based upon the current undeveloped condition of the Lake Elmo site. 3. Development Plans, Each City shall forward to the other City copies of drainage plans submitted in connection with development proposals 'in each of the City' s portion of the Subwatershed. 3 E. Joint Project. Storm water improvement projects which require utilization of portions of the Oakdale Site and the Lake Elmo Site shall be considered joint storm water improvement projects ( "Joint Project" ) and shall comply with the following conditions: 1. initiation. A Joint Project may be initiated by Oakdale, Lake Elmo, or VBWD ,pursuant to applicable statutory regulations. 2. Plan Review. Prior to Joint Project approval by the party undertaking construction of the Joint Project, Joint Project plans and specifications shall be reviewed by all parties to insure compliance with the Drainage Pan. Any disputes regarding compliance shall. be resolved by VBWD, whose decision shall be final. 3. Design,. The portion of the Joint Project to be constructed on the Lake Elmo Site shall be designed in compliance with Lake Elmo regulations and standards for storm water systems and shall further require receipt of appropriate grading or other permits from the City of Lake Elmo. 4. Cost Allocation. The cost of a. Joint Project shall be shared between the two cities on, the basis of proportionate usage, using the peak discharge rate for storm water conveyance systems and 100 year storage requirements for ponds. Based upon. the 4 current land use plans for each of the cities and on the Drainage Plan, the overall cost allocation for a Joint Project will be 81% for Oakdale and 19% for Lake Elmo. To the extent that the land use plans are changed and the Drainage Plan is modified as a result of such change, the cost allocation between the Cities shall be adjusted to reflect the revised peak discharge and volume requirements. Each City reserves the right to reimburse itself for its proportionate share of Joint Project cost in a manner that its City Council deems appropriate. The cost of a Joint Project undertaken by VBWD may be r-covered by special assessments, ad valorem taxes, or by any other means determined appropriate by . VBWD; provided, ' that VBWD shall only recover such cost from property located in the Subwatershed and VBWD shall not otherwise spread such cost against other property located within the jurisdiction ' of the VBWD. S. Waiver of Rights. In those cases where a Joint Project will be undertaken by Oakdale or Lake Elmo, each City shall be in receipt . of a petition and waiver, prior to Joint Project approval, from the owner of property within each City's respective jurisdiction which: 5 a. Requests construction of the improvement; b. Requests that 100% of the Joint Project cost allocated to the city in which the petitioning party's property is located will be specially assessed against the property of the petitioning property owner; and C. waiving any rights to appeal from the imposition of special assessments for such costs. b. Easements. In those cases where the Joint Project requires acquisition of ponding areas or drainage ways, each City shall be in receipt of an agreement, prior to Joint Project approval, from the owners of property within each City' s respective jurisdiction which obligates the property owner: a. to convey the required permanent ponding areas and drainage ways to the City in which the property is located without cost; and b. to convey the required temporary construction easements to the' City in which the property is located or its assigns without costs. 7. Maintenance. Except as herein provided, upon completion of a Joint Project, Lake Elmo will assume responsibility for maintenance and repair of the storm water facilities constructed on the Lake Elmo Site. Any maintenance and repair costs in excess of $2,500.00 per year shall be allocated 81% to Oakdale and 19% to Lake Elmo. To the extent that the land use plans are changed and the Drainage Plan is modified as a result of such 6 change, the cost allocation between the Cities shall be adjusted to reflect the revised peak discharge and volume requirements. Oakdale shall pay invoices submitted by Lake Elmo within thirty (30) days of receipt. F. Future Utility Capacity. Oakdale agrees to extend sanitary sewer and water facilities to the Lake Elmo Site at Lake Elmo's cost in the following circumstances: 1.. Oakdale has water and/or sanitary sewer capacity which its City Council determines is not needed to serve property currently within the jurisdiction of Oakdale; and 2. The owners of property in the Lake Elmo Site request that sanitary sewer and/or water be extended to their property. 3. Lake Elmo amends its Comprehensive plan and zoning regulations to allow severed development on the Lake Elmo Site and the MUSA is extended to cover the Lake Elmo Site. G. Indemnification. Lake Elmo agrees to defend, indemnify, and save Oakdale and VBWD harmless from any and all claims or demands for damages arising out of or which may result from the negligence of Lake Elmo. Oakdale agrees to defend, indemnify, and save Lake Elmo and VBWD harmless from any and all claims or demands for damages arising out of or which may result from the negligence of 7 Oakdale. VBWD agrees to defend, indemnify, and save Lake Elmo and Oakdale harmless from any and all. claims or demands for damages arising out of or which may result from the negligence of VBWD. 8. Dpfaul.t. Any party shall have the right to terminate this Agreement in the event that one of the other parties fails to comply with any of the terms and conditions of this Agreement. However, the Agreement may only be terminated after written notice is personally served on the authorized representative of the other parties as set forth herein, and if the defaulting party shall fail to cure the asserted basis for termination within sixty (60) days of such notice of default. Notwithstanding the foregoing right to cure, the parties may agree to a longer period of time for which to cure the asserted basis of default. I. Noti.fi.cation. All notices, reports or demands required or permitted to be given under this Agreement shall be .in writing and shall. be deemed to be given when delivered personally to either party or officer of the party, to which notice is being given, or when deposited in the United States mail in a sealed -envelope, with registered or certified mail postage prepaid thereon, addressed to the parties at the following addresses: LAKE ELMO: City Administrator City of Lake Elmo 3800 Laverne Avenue North Lake Elmo, MN 55042 8 OAKDALE: City Administrator City of Oakdale 1584 Hadley Avenue North Oakdale, MN 55128 VBWD: Valley Branch Watershed District P.O. Box 838 Lake Elmo, MN 55042--0538 J. Development Regulations. Nothing herein shall be construed to prevent either City from determining which development regulations, shall apply to development in their respective City or shall be construed to prevent either City in any manner from guiding the development of property within their respective City. K. Amendments to Joint Powers Actreement. This Agreement may not be amended without consent of all parties. L. Effective Date of A reement. The effective date of this Agreement shall be the date upon which the owners -of the Lake Elmo Site record restrictive covenants against such property indicating that it is subject to the storm water drainage restrictions outlined in the Joint Powers Agreement. Property owners shall. provide Lake Elmo with evidence of recording. Pursuant to authorization Ci of Lake Elmo authorization granted by the Lake Elmo City Council. on December 3, 1996. By: 9 Pursuant to authorization City of Oakdale . granted by the Oakdale City Council on the R_ day of By 19 � . Pursuant to authorization Valley pBa ch Watershed District granted by the VBWD Board on the day of Q , 19� . By: Its T Y b/city/storm6.agr December 4, 1996 10 4' PAR r= 3TF1J;E] NORTH ",. , ... .. 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E v I: y' �.... , \ urE v040 ao ac- p t3 E STAT E S ` VOL 75 nc-f r t �� M�eMA-8at.o ocroa J I p E V E L O P M E' N T I i 5� 1 1� �I �F r ffI P. \ \ 7c - 11 hra `l Ca '^^ �/ "G toms f o t6S eta $ NOTE Bf3oW y (� r WL t,a.rC-FF � �'♦ I OP - <7 ate 1r f�f}J .`� .} I t �- I I ,�, �MC4t"sis j olw\�(♦l {�q,'%a7�cb�r I 4 ff ``�'� 'l a _�^� I'°'�"°'^ •';1w �r..` t �� 'Ta {w 61'J Iw q.\,% \• •J.w+a/ •,•, 3• DEAU Li VO lo`AC-•FT ..�'.t•-zsr I CRITICAL I VOL 1, Ac-FT f••".•. + I , PONT 2 OeQPcsCkO PP82NpM \ :--^-i'�1 }I'I. `K ••`. I �'� - y.--, t Q I7 cf �y •eyF I` Ij � � '\ ? AssuP11Wt9 1 1�;` ' t�1ROPO1C4 P.QMOIMO { � � •\ •.�• .... '.�' l P p } y I9 t I .L r I•, l 1'�• "•74�OriP',khr5..•"!..•�'-•^.� f ['."""•^l' J 990.0 �, I �,,....N,L,�OpO:Q......:- � E --•9• �\ e � � r.s,,ot�.o ?""""..'; :.-.•: L"-"_.",.- w "'�+.,,,, 4 VOL0.0r0 Ae■rl I .�'•.,...,• 1` T P U N K X 1 G H N A Y tom-'` ••_.....,,,,_, -. "'"""—.,,...,, f! / FUTURE EROSION FIE ANT `-�- ' I CHANNEL OR I PPE SYSTEM A JOINT PROJECT o ' N f_� - ra, QF � ,s Q1i* UEM Vr� t i tww 1 1 NOTES Locagon. shape and deptt, of litoi,80 /� I ponds in Lake Elmo to be determined [Drainage Plan based on adjacent Land use, natural -- Indicates Area Terrain and overall feasibility, pond area 0 400 800 1200 ti Subject to Agreement shown is symbolic only. r p - Hydrologic Informatlon based on a 100 C��kdaf@, 1.»ake El mo $ VSWD Drainage Agreement Scala In feet L I I I I year frequency storm event Deo. 3, 1996 APPENDIX G .:s I520 Lafayette Road North St.Paul,MN 55155-4194 1 651-296-6300 1 800-657-3864 1 651-282-5332 TTY www.pca.state.mn.us w L.1 C� �a December 29, 2008 Mr. Ryan Stempski, P.P. TKDA 444 Cedar Street, Suite 1500 St. Paul,MN 55101-2140 { RE: City of Lake Elmo General MS4 Permit-MCM 4 Construction Site Stormwater Runoff Control Ordinance Dear Mr. Stempski: The Minnesota Pollution Control Agency(MPCA) received your letter dated December 22, 2008, i requesting an extension of the time permitted to complete the requirement of an ordinance for construction site stormwater runoff control as indicated in Part V.G.4.a of the General MS4 Permit. As the city of Lake Elmo currently has provisions for managing construction site stormwater 'I runoff in place,the MCPA grants your request for additional time to complete a more inclusive construction site stormwater runoff control ordinance to coincide with completion of the city of Lake Plmo's Local Surface Water Plan. The final ordinance can be submitted with the 2008 Annual Report which is due on June 30, 2009. Please ensure that a copy of the ordinance is submitted with the 2008 Annual Report. i If you have any questions,please feel free to contact me at 651-757-2377. Sincerely, Amy Garcia Pollution Control 'pecialist Stormwater Section 1 Municipal Division AG:wgp Il ' I i St.Paul I Brainerd Detroit Lakes I Duluth Mankato Marshall Rochester Willmar .,1�50 YEARS STATEHOOD M.M4 I APPENDIX H 1 I i Wellhead Protection Plan l Part I Delineation of Wellhead Protection Areas Delineation of Drinking Water Supply Management Areas Assessment of Well and .aquifer Vulnerability i Prepared for The City of Lake Elmo Minnesota December 2006 l "PAUMENT Amal M. Djerrari, Hydrologist Minnesota Department of Health 1 I I !1 i Table of Contents Page fGlossary of Terms....................................................................................................:.................................i ExecutiveSummary..................................................................................................................................ii 1 Source Water Assessment........................................................................................................................iv WellheadProtection Plan Part 1 ..............................................:................................................................l 1, Introduction........................................................................................................................................ l 1,1. Description of the Water Supply System.................................................................................... 1 1.2. Physical Setting ......................................................................................................................... 1 1.3. Hydrogeologic Setting...................................:........................................................................... 1 1.3.1. Geology .................................................................................................... I 1.3.2. Hydrogeology......................................................................................................................3 i 2. Delineation of the Wellhead Protection Area.....................................................................................5 2.1. Criteria Used to Delineate the Wellhead Protection Area.........................................................5 2.1.1. Time of Travel......................................................................................................................5 2,1.2. Flow Boundaries....................:.............................................................................................6 2.1.3. Daily Volume of Water Pumped .........................................................................................6 2.1.4. Groundwater Flow Field......................................................................................................6 I� 2.1.5. Aquifer Transmissivity........................................................................................................7 ! 2.2. Method Used to Delineate the Wellhead Protection Area.........................................................7 2.2.1. Porous Media Approach Delineation...................................................................................7 2.2.2. Fractured Rock Approach Delineation................................................................................9 2.3. Uncertainty Analysis ............................................................................................................... 10 2.4. Composite Wellhead Protection Area ..................................................................................... 10 2.5. Conjunctive Delineation........................................................................ ................................ 10 f3. Delineation of the Drinking Water Supply Management Area........................................................ 11 I 4. Vulnerability Assessment.................................................................................................................. 11 4.1. Assessment of Well Vulnerability........................................................................................... 11 4.2. Vulnerability Assessment for the Drinking Water Supply Management Area....................... 12 5. Conclusions and Recommendations for Future Improvements ....................................................... 12 6. Selected References.......................................................................................................................... 14 Table of Contents - Continued LIST OF TABLES Table 1: Wells Used by the Public Water Supplier............................................................................ 17 Table 2: Annual Volume of Water Discharged From Water Supply Wells-.................. ............. Table 3: Hydrostratigraphie Column for.Southern Washington County and to Model Layer Definition for Barr's South Washington MODFLOW Model........................ 19 Table 4: Discharge Distribution Within Model ................... 2 Table 5: Parameter Used in the Fracture Flow Capture Zone Delineation.........................................?1 i LIST OF FIGURES t Figure IA: Well 1 - DWSMA....................... Figure1B: Well 2 - DWSMA....................................... ......................................................................24 Figure 2: Well Field......................................:.................................................................................... 2 5 Figure3: Surficial Geology...............................................................................................................26 L. , Figure4: Bedrock Geology...............................................................................................................27 Figure 5: Geologic Cross-Sections Locations.......................................................... .......I........,,,, 28 Figure 6: Geologic Cross-Section A-A'............................................................................................29 r Figure 7: Geologic Cross-Section B-B. ............................................................................................30 Figure 8: Geologic Cross-Section C-C. .............................................................................................31 t.. Figure 9: Geologic Cross-Section D-D' Figure 10: Geologic Cross-Section E-E..............................................................................................33 Figure 1 1. Geologic Cross-Section F-F. ...............................................................1..............................34 fi Figure 12: Regional and Local Modal Grids.........................................................................................35 Figure 13: Regional and Local Model Calibration - Computed Vs. Observed Hydraulic Heads.......36 Figure 14: Calibrated Hydraulic Head Contours in the Prairie du Chien Group and JordanSandstone - Regional Model................................................:.................................37 Figure 15: Calibrated Hydraulic Head Contours in the Franconia-Ironton-Galesville Sandstones-Regional Model............................................................................................38 Figure 16A: Calibrated Hydraulic Head Contours in the Prairie du Chien Group Near Well I............39 Figure 16B: Calibrated Hydraulic Head Contours in the Prairie du Chien Group Near Well 2............40 Figure 16C: Calibrated Hydraulic Head Contours in the Jordan Sandstone Near Well 1.....................41 Figure 16D: Calibrated Hydraulic Head Contours in the Jordan Sandstone Near Well 2.....................42 Figure I7A: Calibrated Hydraulic Head Contours in the FIG Aquifer Near Well 1 .............................43 Figure 17B: Calibrated Hydraulic Head Contours in the FIG Aquifer Near Well ? { r t° t: 1 Table of Contents - Continued }� Figure 18: 10-Yrs.Travel Time Capture Zone (Porous Media) - Base Case.......................................45 i Figure 19: Capture Zone Delineation Sensitivity (Porous Media)..........................................:...........46 4 Figure 20: Capture Zone Delineation (Fracture Flow)........................................................................47 I . Figure 21: CWI Wells Reviewed .......................................................................................................48 Figure 22: DWSMA Vulnerability....................................................................... 49 I ' LIST OF APPENDICES AppendixA: Well Logs.........................................................................................................................50 Appendix B: Well Vulnerability Assessments ......................................................................................53 f . 1 I . Glossary of Terms f Wellhead Protection Area (WHPA). The surface and subsurface area surrounding a well or well • field that supplies a public water system, through which contaminants are likely to Move toward and reach the well or well field (Minnesota Statutes,Part 1031.005, subdivision 24). Drinking Water Supply Management Area (DWSMA). The area delineated using identifiable land marks, defined in this report, that reflects the scientifically calculated wellhead protection area boundaries as closely as possible(Minnesota Rules 4720.5100, subpart 13). Source Water Protection Area (SWPA). A source water assessment includes a description of 1) the area to be protected, 2) potential contamination sources that may impact the source of drinking water, and 3)the susceptibility of the public water supply to potential contamination sources. For the purposes of this delineation report, the SWPA and the DWSMA are the same. I . 1 f � I 4 � ti i I Executive Summary This report documents the technical information necessary to prepare Part I of a wellhead protection plan that will help ensure an adequate and safe drinking water supply for the City of Lake Elmo(public water supply identification number 182009). It documents the delineation of the wellhead protection area(WHPA), the drinking water supply management area (DWSMA), and the vulnerability assessments for the public water supply well(s) and DWSMA. Definitions explaining the differences between the terms WHPA, DWSMA, and SWPA are provided in the Glossary of Terms at the beginning of this report. The delineation was performed in accordance with Minnesota Rules 4720.5100-4720.5590 for preparing and implementing wellhead protection plans for public water supply wells. The Minnesota Department of Health (MDH) administers these rules and the results described in this report reflect those of the MDH to 1) identify the capture zones for delineation of the WHPA, and 2) prepare well and DWSMA vulnerability assessments. Also, this report presents the findings of the public water supplier to identify 1) the surface water runoff component of the WHPA (if warranted). and 2) the boundaries of the DWSMA. The public water supplier operates two primary wells: Well 1(Unique No. 208448) and Well 2 (Unique No. 603085). Well 1 (208448) is a multi-aquifer well open to the Jordan Sandstone, Franconia-fronton-Galesville (FIG), and Mt. Simon Aquifers. NVcll 2 (603085) is open to the Prairie du Chien Group and Jordan Sandstone Aquifer. Well 1 1208448) is located in Section 13 of Township 29 North, Range 21 West. Well 2 (603055) is located in Section 6 of Township 29 North, Range 20 West. Both wells are in Washington County (Figure 2). The WHPAs for Well 1 (208448) and Well 2 (603085) were delineated using multi-aquifer groundwater flow models. Figure 18 shows the boundaries of the 10-year time of travel capture zones for the Jordan/FIG/Mt. Simon Well 1(208448) and the Prairie du Chien-Jordan Well 2 (603085). The WHPA shown in Figure 1 takes into account uncertainties in the hydraulic parameters of the aquifers and in the flow regime in the Prairie du Chien Aquifer(i.e., fracture flow versus porous media). The DWSMA, also shown in Figure 1, was defined using city streets. highways, and public land survey section lines. The Prairie du Chien-Jordan Aquifer exhibits different vulnerabilities within the DWSMA. Most of ' the DWSMA is rated moderately vulnerable to contamination from activities that occur at the land surface, where the upper bedrock aquifer is overlain by glacial deposits that exhibit low permeability. A few areas were rated as having a high vulnerability status, mostly due to the presence of windows 1 within the low permeability till unit. The Jordan/FIG/Mt. Simon Well 1 (208448) was found to be nonvulnerable because most of its water comes from the underlying FIG and Mt. Simon Aquifers. Overlying confining units (i.e., the St. Lawrence Formation, and/or the Eau Claire Formation) protect these latter aquifers. Prairie du Chien-Jordan Well 2 (603085) was found to be vulnerable, even though it is located in an area with a { moderately vulnerable status. The presence of tritium in this well is believed to be due to recharge ' through windows in the till. i ii An updated source water assessment with a new SWPA is included in this report. The MDH is required under Section 1453 of the 1996 Amendments to the federal Safe Drinking Water Act to prepare source water assessments for all public water supply systems. Congress intends that �- assessments should be used to educate public water suppliers and the customers they serve about the source of their drinking water and potential contaminants that may affect people's health. The following source water assessment for the public water supplier contains the information specified in Minnesota's source water assessment program description. L r f 1 L F. r i_ r. . iii f f Source Water Assessment City of Lake Elmo, Minnesota Public Water Supplier ID Number: 1820009 Water Supplier Contact: Michael J. Bouthilet 3800 Laverne Avenue Lake Elmo, MN 55042 Phone: (651) 770-2537 MDH Contact: Art Persons 18 Wood Lake Drive Southeast Rochester, MN 55904 art.persons C,heal th.state.mn.us Phone: (507) 292-5138 I Status of the Source Water Protection Plan The Minnesota Department of Health has approved the l) delineation of the wellhead protection area. 2) delineation of the drinking water supply management area, and 3) assessments of well and aquifer vulnerability. The public water supplier is proceeding with the development of the remainder of the wellhead protection plan. Source Water Protection Area - See Figure 1. Description of the Source Water-The City of Lake Elmo obtains its drinking water supply.from two primary wells. Well 1 (208448) is a multi-acluifer well open to the basal portion of the Jordan Sandstone, and the Franconia-Ironton-Galesville (FIG) and Mt. Simon Aquifers. Well 2 (603085) is open to the Prairie du Chien-Jordan Aquifer. Table 1 Wells Used by the Public Water Supplier Well No. Unique Well Use Aquifer Type Well well r Aquifer No. Depth (ft) Sensitivity Sensitivity Well 1 208448 Primary Bedrock 808.0 See (2) Low Well 2 603085 Primary Bedrock 2_85.0 See(2) High The Prairie du Chien Group varies in thickness, due to erosion, from 0 to over 220 feet. Locally, the Prairie du Chien Group rests on top of the Jordan Sandstone everywhere except in a north-south trending bedrock valley, where it has been removed by erosion. The Jordan Sandstone is about 90 feet thick, except in the bedrock valley where its thickness may be diminished by 40-50 percent. 1 iv Source Water Assessment City of Lake Elmo Page 2 Unconsolidated deposits consisting of a mix of sandy outwash and sandy loamy till bury the bedrock aquifers. The valley fill deposits are about 110 feet thick near City of Lake Elmo Well 2 (603085) but increase to over 250 feet at city Well 1 (208448), located within the north-south trending bedrock valley. } Well Construction Assessment-Well 2(603085) meets current standards for construction and maintenance. Well 1 (208448)is open to several aquifers, which is no longer permitted. However, this factor does not contribute to the susceptibility of the source water to contamination. Well Sensitivity-Well sensitivity refers to the integrity of the well due to its construction and maintenance. It is based on the results of the well construction assessment. It can be one of the following: (1) The well is susceptible to contamination because it does not meet current construction standards or no information about well construction is available,regardless of aquifer � I. sensitivity. (2) The well is not susceptible because it meets well construction standards and does not present a f pathway for contamination to readily enter the water supply. Aquifer Sensitivity- Aquifer sensitivity refers to the degree of geological protection afforded the aquifer(s)used by the public water supply. High - The bedrock aquifer is considered to exhibit a high sensitivity to contamination because of the local geological setting. Low - The bedrock aquifer is covered by one or more layers of fine-grained material that probably protect it from potential sources of contamination. Source Water Susceptibility - Source water susceptibility refers to the likelihood that a contaminant will reach the source of drinking water. It reflects the results of assessing well sensitivity, aquifer sensitivity, and water quality data. High-The source of drinking water is considered to exhibit a high susceptibility to contamination because of the local geological setting. Low-The source of drinking water is covered by one or more layers of fine-grained material that probably protect it from potential sources of contamination. Contaminants of Concern -The following statement summarizes the potential contaminants for which a source of drinking water may be at risk: One or more contaminants regulated under the federal Safe Drinking Water Act for this public h source water. However, the water supplied water supply system have been detected in e rce ou to users meets state and federal drinking water standards for potability. For further information, please contact the MDH representative listed at the beginning of this assessment. v i Wellhead Protection Plan - Part l City of Lake Elmo, Minnesota 1 . Introduction This report documents the delineation of the wellhead protection areas and drinking water supply management areas for the drinking water supply wells operated by the City of Lake Elmo, PWSID No. 1820009. The delineation was performed in accordance with rules (Minnesota Rules 4720.5100 to 4720.5580)for preparing and implementing wellhead protection measures for public water supply wells. The rules are adnunistered by the MDH. 1.1 . Description of the Wafer Supply System The City of Lake Elmo obtains its drinking water supply from two primary wells (Table 1). Well 1 (208448)is a multi-aquifer well open to the basal portion of the Jordan Sandstone, and the Franconia- Ironton-Galesville (FIG), and Mt. Simon Aquifers. Well 2 (603085) is open to the Prairie du Chien- Jordan Aquifer. Well logs for the city wells are provided in Appendix A. The City of Lake Elmo maintains 830,000 gallons of total storage. The system serves 670 connections, with approximately 2,306 residential customers, as well as several commercial, industrial, t and institutional customers. { 1.2. Physical Setting The city of Lake Elmo is located in central Washington County. Well 1 (208448) is located in Section 13 of Township 29 North, Range 21 West. Well 2 (603085) is located in Section 6 of Township 29 North,Range 20 West (Figure 2). The City of Lake Elmo also owns Well 3 (655910) but f this well is not connected to the system. The City was planning,to'use it as a long-term backup, but chemical contamination was detected recently in this well. 1.3. Hydrogeologic Setting 1.3.1. Geology Few detailed geologic studies are available that describe subsurface geologic conditions specifically in the area around Lake Elmo. However, parts of the central Washington County area benefit from 1 regional-scale geologic and hydrogeologic studies (Swanson and Meyer, 1990; Kanivetsky and Cleland, 1990;Meyer and others, 1990; and Mossler and Tipping,2000). Well construction records were used to supplement the regional information. Unconsolidated Quaternary deposits bury the bedrock aquifers used by the City of Lake Elmo wells. These unconsolidated deposits typically consist of a mix of sandy outwash and sandy loamy till (Figure 3)deposited during the advance of the Superior lobe(Meyer and others, 1990) and earlier i events. They are about 110 feet thick near City of Lake Elmo Well 2(603085) but are greater than I .. 250 feet at City of Lake Elmo Well 1 (208448), which is located over a major north-south trending bedrock valley (Figure 4). I 1 L The Minnesota Geological Survey (MGS) developed Arc grids of four major tills in Washington County (Tipping et al., 1998). Most of these tills are in the northern part of the county, in the vicinity of the St. Croix Moraine. The northeastern Lake Elmo area contains three of the four till units, excluding only the Des Moines Lobe till (Unit 1). The till units mapped in the Lake Elmo area include: . e Unit 2 -red loam-to clay-loam textured, unsorted sediment, with scattered pebbles,cobbles, and boulders; associated with the St. Croix phase of the Superior Lobe advance and perhaps slightly older tills of similar composition (0 to 150-foot thickness); • Unit 3 - old gray till materials that are typically more finely-grained than the Unit 2 tills (0 to f 50-foot thickness); and • Unit 4 -reddish-gray till of likely Superior provenance (0 to 60-foot thickness). This till is mostly present at Lake Elmo Well l (208448), within the bedrock valley. � Geologic logs from wells located in the area were used to construct six cross sections. Figure 5 shows the locations of the geologic cross sections.. The geologic cross-sections (Figures 6 through l l) generally confirm the regional conditions. However, based on the drillers' logs, Unit 2 appears to be f .. more tine-grained than in the MGS description. often described by the drillers as clay. Below the glacial drift lies bedrock, which in this area consists of Paleozoic sedimentary rocks forming part of the Twin Cities structural basin. The Washington County area is on the eastern part of the Twin � Cities structural basin,which is located at the northern end of the. Hollandale Embayment. The embayment formed during the Paleozoic Era and is.a.syncline between the Wisconsin Arch to the east C and the Transcontinental Arch to the m.est tMossler. 1972t. The Twin Cities Basin is centered approximately where the Minnesota and Mississippi Rivers meet, and is bounded on the east by the t- St. Croix River and on the north and west by the subcrop of Precambrian rocks in Wright, Sherburne, and Isanti Counties. The Paleozoic rocky comprising the sedimentary sequence are more than 1000 feet thick in the center of the basin. The rocks comprising the upper part of this sequence in the northeastern Lake Elmo area are the Jordan Sandstone, the Prairie du Chien Group, and the St. Peter Sandstone. The St. Peter Sandstone is the uppermost unit and varies in thickness, due to erosion. from 0 to 175 feet. The Prairie du Chien Group varies in thickness,due to erosion, from 0 to about 210 feet. Locally,the Prairie du Chien Group rests. on top of the Jordan Sandstone everywhere except in the north-south trending bedrock valley, where it has been removed by erosion. The Jordan Sandstone is about 90 feet thick,except in the bedrock valley where its thickness may be diminished by 40 to 50 percent. Each of these units dips slightly towards the center of the Twin Cities Basin (i.e.., to the southwest). After the deposition of the rocks in the basin, stream erosion established an extensive drainage system on the bedrock surface. This drainage system manifests itself today as buried bedrock valleys in the (a Twin Cities area. Many bedrock valleys are filled with glacial deposits and.are only apparent by examining the geologic records of wells drilled throughout the area. Figure 4 shows the uppermost bedrock under the eastern portion of the City of Lake Elmo(where the wells are located) is Prairie du Chien Group dolomite, which.overlies the Jordan Sandstone. r i 1.3.2. Hydrogeology ( All the major bedrock aquifers in the Twin Cities area are in the Paleozoic sedimentary sequence. In f Washington County, these include the Prairie du Chien-Jordan Aquifer, the Franconia-Ironton- Galesville (FIG) Aquifer, and the Mt. Simon (and Hinckley) Aquifer. All of these are present throughout central Washington County. A detailed description of the hydrogeologic units can be found in the Integrating Groundwater & SuiJace Water Management modeling report prepared by Barr Engineering Company (2005) for j southern Washington County. The following paragraphs provide a brief overview of the l hydrogeologic units encountered in the north vest metropolitan area. I Quaternary Sand and Gravel(Water Table)Aquifer -Neither of the City of Lake Elmo wells are I completed in quaternary deposits. The surficial deposits in this section of central Washington County are classified by Meyer and others (1990) as outwash. while the buried materials include sandy-clay tills. The water table occurs in the glacial materials at depths of 50 to 110 feet. Kanivetsky and Cleland (1990) suggest that the regional direction of groundwater flow for the water table aquifer is to the east-southeast. The coarse-grained nature of the upper unconsolidated'nuiteriarls provides a pathway for surface water ' to recharge groundwater and land use to impact the quality of groundwater near the City of g a l q y g y Lake Elmo wells. Many well logs indicate sandy, glacial materials rest directly on top of the Prairie du Chien Group (Figures 7, 8, and 10). As a result, the water table aquifer is likely hydraulically connected to the upper Prairie du Chien Group. at least in areas where fine-grained till is missing. The hydraulic interplay between these units probably varies considerably, ho A.'ever, depending on the role till units play in controlling aquifer recharge. St. Peter Sandstone Aquifer-The upper part of the St. Peter Sandstone is poorly cemented, and may be used to supply domestic wells. The lo"-er portion of the St. Peter Sandstone is shaley and functions as an aquitard over the Prairie du Chien Group (Palen. 1990), It has eroded away over much of the area where the Lake Elmo wells are located (Figure 4). Where the St. Peter Sandstone is absent, glacial deposits overlie the Prairie du Chien Group. Till or other glacial deposits.offer varying degrees of leakage resistance. Prairie du Chien-Jordan Aquifer-The Prairie du Chien Group and Jordan Sandstone are generally 1 considered to comprise a single aquifer system in the Twin Cities metropolitan area.. However, the nature of the hydraulic interaction between the two units varies because the rocks comprising the lowermost portion of the Prairie du Chien Group (i.e.,the Oneota Dolomite) can be locally confining (Runkel et at., 2003). Each unit responds to the same set of regional boundaries: diffuse recharge by infiltration and leakage from adjacent aquifers, and discharge to major rivers and bedrock valley fill materials, As a result, groundwater flow elevations in each unit are quite similar. Kanivetsky and Cleland (1990)report that the local flow direction is to the east-southeast. Although the groundwater elevations and flew directions are similar for the Prairie du Chien Group and Jordan Sandstone. the groundwater flow velocity may differ substantially. The Jordan Sandstone t exhibits flow conditions typical of a porous rnediurn. In contrast, the Prairie du Chien Group is a dolomite and flow is dominated by secondar}l porosity features such as fractures and solution- l . . i 3 I enhanced cavities. Bedding plane frac,tur• have been observed at consistent intervals in the Prairie du es Chien Group,and the presence of vertical fractures is more extensive in areas where the unit subcrops or is close to the suberopping bedrock surface (Runkel et al., 2003). It is likely that groundwater.in the Prairie du Chien Group is transmitted at velocities higher than in the Jordan Sandstone,especially when stressed by pumping. Prairie du Chien Group - Along with the Oneota Dolomite, the Shakopee Formation snakes up the Prairie du Chien Group. The areal extent of the Prairie du Chen Group is similar to that of the underlying Jordan Sandstone. Runkel et al. (2006) report a range of horizontal hydraulic conductivity values of 19 to 107 feet/day from field tests. L Flow in the Prairie du Chien Group is dominated by a few thin zones of highly-connected horizontal r fractures in the Shakopee Formation and the upper part of the Oneota Dolomite (Runkel et al., 2003). L Horizontal hydraulic conductivity values within these thin zones can exceed 1,000 feet/day. Between these fracture zones, the hydraulic conductivity is much lower. At a very local scale, these horizontal zones of high flow may not.be well connected but regional fractures and joints provide good connection on a more regional basis. This allows the upper part of the Prairie du Chien Group to be treated as a single aquifer system. t` Recharge is primarily through vertical leakage from the glacial deposits and the St. Peter Sandstone. L. Some additional recharge, as lateral flow,enters the aquifer in northwestern Washington County from the unconsolidated sediments that abut the subcrop area of the aquifer. Discharge is into the valleys f of major rivers. The basal part of the Oneota Dolomite is a regional confining layer(aquitard) in southern - Washington County and throughout southeastern Minnesota (Runkel et al.,2003). The confining unit is about 40 feet thick and consists of massive, relatively non-fractured dolomite. Packer tests performed by the Minnesota Geological Survey suggested that the non-fractured portions of the basal Oneota Dolomite may have hydraulic conductivity values as low as 10"4 feet/day (Runkel et r al.. 2003). Fracturing that cuts through the basal Oneota Dolomite provides the means for leakage between the Jordan Sandstone below and the Shakopee Formation above, f ' Jordan Sandstone - In Washington County, some high-capacity wells are completed solely within this unit, which is approximately 90 feet thick. The degree of cementation of the Jordan Sandstone varies, which affects the hydraulic conductivity. Schoenberg (1990)reports a range of horizontal hydraulic conductivity values from 19 to 107 feet/day from field tests. The Jordan Sandstone subcrops beneath glacial deposits along 1) the axis of the bedrock valley, and 2) alluvium in major river valleys, which are the primary discharge zones. Along the St. Croix and Mississippi Rivers,hydraulic head can be expected to be at or slightly above the elevation of the river. Discharge via high-capacity wells is also a significant discharge route. Recharge is primarily through leakage from the overlying Prairie du Chien Group. Flow in the Jordan Sandstone radiates east, west, and south from a groundwater divide that trends north-south and roughly bisects Washington County. St. Lawrence Confining Layer- The St. Lawrence Formation is a regional, leaky, confining layer a uitard that separates the Franconia-Ironton-Galesville Aquifer from the overlying Prairie du Chien- Jordan P q Y g Jordan Aquifer. Runkel et al. (2003) describe the St. Lawrence Formation as having low bulk hydraulic conductivity in the vertical direction that can provide confinement. These confining characteristics are present where the St. Lawrence Formation is overlain by the Jordan Sandstone. ' 4 . I I Franconia Aquifer-The Franconia Formation is often lumped together with Ironton-Galesville Sandstones (as the FIG Aquifer) or with the overlying St. Lawrence Formation as a regional aquitard. Following recommendations from the MGS, Barr Engineering Company treated the tippet portion of the Franconia Formation and the Ironton-Galesville Aquifer as two separate layers in their 2005 model for Washington County, with the lower portion of the Franconia Formation providing some type of resistance to vertical flow. Ironton-Galesville Aquifer-The Ironton-Galesville Aquifer consists of the Ironton Sandstone and the Galesville Sandstone. The Ironton-Galesville Aquifer has not been highly utilized because sufficient water supplies can be obtained from shallower units, such as the Prairie du Chien-Jordan Aquifer. Where the honton-Galesville is covered by at least 50 feet of younger bedrock,hydraulic conductivity 1 values typically range from 1.5 to 48 feet/day and average about 10 feet/day (based on specific capacity tests). In shallower conditions of burial beneath younger bedrock, interconnected fracture systems seem to develop,resulting in average hydraulic conductivity values of about 30 feet/day (Runkel et al., 2006). Eau Claire Formation -The Eau Claire Formation is a substantial confining unit, consisting of 60 to ! 110 feet of low-hydraulic conductivity siltstone, shale, and silty sandstone. Its thickness in the Lake Elmo area ranges from 85 to 110 feet and averages almost 100 feet. The Eau Claire Formation ° subcrops beneath glacial deposits near the St. Croix River in southern Washington County. Mt. Simon-Hinckley Aquifer- The Mt. Simon Sandstone and the Hinckley Sandstone are generally not differentiated from one another for hydrogeologic purposes and are considered to function as a single aquifer. The Mt. Simon-Hinckley Aquifer is not as well connected to major rivers and streams in the region (compared to other aquifers of younger formations), principally because the overlying Eau Claire Formation is a substantial and areally extensive aquitard. Data on groundwater movement in the Mt. Simon-Hinckley Aquifer is limited but flow is generally different from the overlying aquifers—flowing west-northwest to the pumping centers of the central cities area in southern I Washington County. Lake Elmo Well 1 (208448) is open across multiple aquifers,from the base of the Jordan to the Mt. Simon Aquifer. 2. Delineation of the Wellhead Protection Area 2.1 . Criteria Used to Delineate the Wellhead Protection Area The following discussion presents the information used to address the five criteria for delineating a WHPA, as specified under Minnesota Rules 4720.5510. 2.1.1. Time of Travel A minimum ten-year time of travel criteria must be used to determine a wellhead protection area in order to provide sufficient reaction time to address potential sources of contamination that may have potential health impacts on the users of the public water supply. A time of travel of ten years was considered in this study. r 4 5 i L 2.1.2. Flow Boundaries To accurately delineate the WHPAs, it is necessary to assess the effects that nearby wells, streams, lakes, and variations g }ma • in geologic conditions have on groundwater flow directions and velocities. The WHPAs for the city wells open to the Prairie du Chien Group. Jordan Sandstone, and/or FIG Aquifers were delineated using a regional groundwater flo%v model developed by Barr for Washington County (Barr, 2005). The model takes into account regional flow boundaries (i.e., aquifer limit, streams, and aquifer recharge),spatial variations in aquifer properties, and the effect of high-capacity wells. Local geological features were also included in the model. The buried bedrock valley was represented in the model by variable model layer elevation~ that mimic how aquifer thickness varies across the 1 area. In areas where the aquifer has been completely eroded, an hydraulic conductivity in.homogeneity that represented the properties of the fill material was added. In addition, local surface water features, such as Lake Elmo, Lake Demontreville, Lake Jane, and Lake Olson, were re-digitized and explicitly included in the local model. The WHPA for the lower portion of Well 1 (20,448). open to the Mt. Simon Sandstone Aquifer, was delineated using the regional groundwater flo%v model developed by the Minnesota Pollution Control t Agency (MPCA). This model also takes into account regional flow boundaries (i.e., aquifer limit and - aquifer recharge), spatial variations in aquifer properties, and the effect of high-capacity wells. Flow in the Prairie du Chien Group could be dominated by secondary porosity,owing to the occurrence of fractures,joints, and solution cavities. and niay not be accurately described by models � based on the porous media assumption. For this reason, a separate approach to delineation r (i.e.,:Fracture flow delineation) also was considered. L : 2.1.3. Daily Volume of Water Pumped Historical pumping data was acquired from the City of Lake Elmo or from the Minnesota Department L of Natural Resources (DNR). The previous five years of data, reported to the DNR under Groundwater Appropriations Permit No. 611031, is summarized in Table 2. The largest annual withdrawal for the F period 2001-2005 was 64.7 million gallons in 2003. k . The City of Lake Elmo indicated that a greater annual volume of water will be used in the next five years and this volume is also listed in Table 2, This latter volume (162.6 millions gallons) was apportioned to each well, based on historical pumping, and used to determine the well's WHPA delineation. 2.1.4. Groundwater Flow Field For this study, the ambient direction of groundwater flow in the Prairie du Chien-Jordan Aquifer was estimated, based on the piezometric map from Plate 5 of the Washington County Atlas (Swanson and �- Meyer, 1990). Groundwater in the Prairie du Chien-Jordan Aquifer flows to the southeast in the northeastern portion of the City of Lake Elmo. Groundwater in the FIG Aquifer also flows to the southeast. Groundwater in the Mt. Simon Aquifer has a different pattern and flows to the southwest, toward a cone of depression created by the major pumping centers in the City of St. Paul. Locally, groundwater is diverted toward Lake Elmo Well 1 (208448) and the Anderson Corporation wells in Bayport. 2.1.5. Aquifer Transmissivity The aquifer transmissivity of the Prairie du Chien-Jordan Aquifer was estimated from data collected during aquifer testing performed by the City of Oakdale and the MDH on Oakdale Municipal Well 5 (127287) on October 15 and 16, 1998. The transmissivity for the Jordan Sandstone ranged from 6,000 feet`/day to 7,470 feet`'/day. The average thickness of the Jordan Sandstone is 93 feet, yielding hydraulic conductivities ranging from 64 feet/day to 80 feet/day. A value of 75 feet/day was used around the Lake Elmo well field for the delineation. Transmissivities of 1,100 feet'/day and 2,710 feet'/day were assumed in the MPCA Metro Model for the FIG and Mt. Simon Aquifers, respectively, based on a literature search, These values correspond to a thickness of 197 feet and an hydraulic conductivity of 5.6 feet/day for the FIG, and a thickness of 197 feet and an hydraulic conductivity of 13.8 feet/day for the Nit. Simon. The Barr Model was originally calibrated with an hydraulic conductivity of 54.1 feet/day for the Ironton-Galesville. This value is almost ten times larger than that used in the Metro Model. The Barr Model was recalibrated for an hydraulic conductivity of 5.6 feet/day for the lronton-Galesville, similar to that used in the MPCA Metro Model. This latter value is close to the averagc hydraulic conductivity of 10 feet/day derived from specific capacity tests data and reported by Runk-el et al. (20061 for deep bedrock conditions. 2.2. Method Used to Delineate the Wellhead Protection Area ' Two groundwater models were used to delineate the wellhead protection areas. Layers 4 and 5 of the analytical element Metro Model developed by the MPCA were used foe-delineating the capture zone of the Mt. Simon portion of.Well 1 (208448). The South IvVmhington County Model developed by Barr for Washington County was modified, re-calibrated, and Uaell to delineate the WHPA for Well 2 (603085) and the upper portion of Well 1 (208448) that is screened in the Jordan Sandstone through the FIG. A detailed description of the models used is provided below. The models are based on the fundamental assumption that the simulated aquifers behave as porous media. Flow in the Prairie du Chien Group could be dominated by secondary porosity, owing to the occurrence of fractures,joints,and solution cavities, especially in shallow bedrock settings. For this reason, fracture flow delineation also was utilized. 2.2.1. Porous Media Approach Delineation Delineation Method for the Lower Portion of Well 1 (208448) -The Metro Model is a regional groundwater flow model encompassing the Twin Cities seven-county Metropolitan area and was developed by staff of the MPCA Division of Environmental Outcomes (Seaberg, 2000; Hansen and Seaberg, 2000). It uses the Multi-Layer Analytic Element Model (MLAEM) software, based on the analytic element method pioneered by Professor Otte U.L. Strack of the University of Minnesota Civil Engineering Department. The complete MPCA Metro Model simulates multi-aquifer groundwater flow and is based on a conceptual model that consists of five aquifer layers, four of which represent bedrock twits. These units consist of 1) Glacial Drift Aquifer[Layer 11. 2) St. Peter Sandstone [Layer 21. 3) Prairie du Chien-Jordan Aquifer [Layer 3], 4)Franconia-Ironton-GalesviIle Aquifer [Layer 41, and 5) Mt. Simon- Hinckley Aquifer [Layer 5]. Separate groundwater simulations exist for all five layers that occur within three hydrologic provinces whose boundaries are formed by the Minnesota and Mississippi Rivers. { 7 l 4� I L The discharge used in the delineation at Well 1 (208448) was distributed between the Jordan Sandstone, St. Lawrence Formation,FIG, and Mt. Simon Aquifers, according to their respective transmissivities used in the models. The assumed discharge distribution is shown in Table 4. It was thus assumed that only 36.1 percent of the discharge from this well is contributed by the Jordan Sandstone and FIG Aquifers. The remaining discharge(Le., 63.9 percent) is contributed by the Mt. Simon Aquifer. Porosities within the respective formations are provided in Table 4. Results of the 10-year capture zone delineations in the Mt. Simon Aquifer stressed by Well 1 (208448) are shown on L Figure 18. Delineation Method for Well 2 (603085)and the Upper Portion of Well I (208448) -Well 2 (603085) L is open to both the Jordan Sandstone and the Prairie du Chien Group. The upper portion of Well 1 (208448) is open to both the Jordan Sandstone and FIG Aquifers. Barr(2005) developed a groundwater MODFLOW model of the major aquifers in southern L Washington County. This groundwater model was developed primarily to predict the effects of ro osed water-supply wells that are planned for the western ortion-of the City of Woodbury. The proposed PPy P ' P y model consists of eight layers that represent, from top to bottom, the following units: (1) surficial aquifer of glacial deposits; (2) St.Peter Sandstone-, (3) Shakopee Formation of the Prairie du Chien Group; (4) Oneota Dolomite of the Prairie du Chien Group (aquitard); (5) Jordan Sandstone: (6) St.Lawrence Formation (aquitard); (7) Upper Franconia Formation; and (8) Ironton-Galesville t Aquifer. The groundwater model was calibrated to steady-state water levels, The hydrostratig.raphic column within the Metro area and the associated model layer correspondence are provided in Table 3. The regional model extends to the natural hydraulic boundaries, the Mississippi River to the west and south and the St. Croix River to the east. These river boundaries, along with wells, lakes, and infiltration, provided the model boundary conditions (Figure 12). r A review of the Barr Model revealed that it was originally calibrated with a horizontal hydraulic conductivity of 4.3 feet/day for the Franconia and 54 feet/day for the Ironton-Galesville, The Metro Model used for the hydraulic conductivity of the combined FIG Aquifer had a value almost ten times 4 smaller than that used by Barr for the Ironton-Galesville Aquifer. Runkel et al. (2006) reported an average hydraulic conductivity of 10 feet/day for the.Ironton-GalesviIle Aquifer in deep bedrock ' conditions, similar to those encountered in the Lake Elmo area. The MPCA value was based on a review of pumping test data. The value by Runkel et al. was based on specific capacity tests; while the hydraulic conductivity of the Ironton-Galesville was set by automated calibration in the Barr Model. The regional Barr Model was modified to include an hydraulic conductivity of 5.6 feet/day for the Ironton-Galesville, similar to that used in the MPCA Metro Model and close to that reported by Runkel et al. The pumping well file was also modified to reflect more accurate data from the MDH County Well Index (CWI)database. The DNR water appropriation data was also used to update pumping rates for these wells. Pumping rates averaged over the last 10 years were used rather than the 2002 data, as was . done by Barr. It should be noted that this last modification did not have any significant influence on the calibration. Based on the existing uncertainty in the head data, one could have proceeded either F way. L The regional model was calibrated to the targets used by Barr(2005). The calibration of the regional model was performed using a manual trial-and-error procedure by changing the recharge rates and comparing modeled piezometric heads against measured values at observation well locations, until a satisfactory fit was obtained. The graphs of coinputed versus observed piezometric heads are 8 t displayed on Figure 13. A more quantitative measure by which to evaluate the success obtained during calibration is to compare the mean root,mean square of the residuals (R.MSE) and the maximum observed head difference across the model. A usually accepted calibration target is a RMSE that represents less than 15 percent of the total head change across the modeled area. For the present calibration, the RMSE is less than 8 percent of the maximum observed head difference across the model (Figure 13). The modeled groundwater elevation contour maps for the Prairie du Chien Group and the Jordan Sandstone are depicted in Figure 14. The ]lead contours for the Franconia Formation and the Ironton-Galesville Sandstones are depicted in Figure 15. A local telescopic model populated with the updated model parameters was used to delineate the wellhead protection area (Figure 12). The local model has a constant grid spacing of 50 m. The calibrated regional model provided the boundary conditions at the head-specified cells along the.,model Iboundaries. After construction, the refined model calibration was verified. The graph of computed versus observed piezometric heads are displayed on Figure 13 for the combined observations in Layers 1 through 8, along with the calibration statistics. The modeled groundwater elevation contour maps for the Prairie du Chien Group and Jordan Sandstone are depicted in Figures 16A-16D. The head contours for the FIG Sandstones are depicted in Figure 17. Prior to its use in the delineations, the following modifications were incorporated in the refined model: • A local area of modified horizontal conductivity was included in the model to reflect the transmissivity obtained from the City of Oakdale pump test. The Jordan Sandstone was assigned an hydraulic conductivity of 75 feet/day. Lake Elmo, Lake Demontreville, Lake Jane, and Lake Olson were re-digitized and modeled as head-specified boundaries. o The pumping rates from Table 2 were distributed across the different layers according to the model layer transmissivitieS (Table 4). The delineation was performed by backtracking particles from the wells to a 10-year time of travel using the particle tracking MODPATH code. A series of 250 particles (more than 50 in each layer) were launched at each well. A porosity of 9 percent was used for the Prairie du Chien Group and a porosity of 20 percent was used for the Jordan Sandstone. A porosity of 25 and 28 percent was used for the drift and the St. Peter Sandstone,respectively (Table 4). Results of the 10-year time of travel capture zone are shown on Figure 18. 2.2.2. Fractured Rock Approach Delineation t The secondary porosity features that dominate the porosity of the Prairie du Chien Group require t additional analysis as part of the WHPA delineation. The draft MDH guidance was used to make the fracture flow WHPA assessment (MDH, 2005). Well 2 (603085) is completed in both the Prairie du Chien Group and the Jordan Sandstone. A calculated fixed radius (CFR) calculation, in conjunction with hydrogeological mapping techniques, was used to make the supplemental fracture flow analysis (cf., Technique 3 of the draft guidance; MDH, 2005a). The hydraulic gradient in the Prairie du Chien Group near Well 2 (603085) is greater than 0.001 (i.e., 0.003 feet/foot, Figure 16A). The pumping was apportioned based on the respective thicknesses of the Prairie du Chien Group and Jordan Sandstone at Well 2 (603085). It was assumed that 54 percent of the pumped volume at Well 2 (603085)comes '} from the Prairie du Chien Group. The CFR with its upgradient extension is shown in Figure 19, The 1 parameters used in the determination of the CFR and its extension are given in Table 5. 9 No fracture flow delineation was needed for Well 1 (208448) because the total leakage from the Prairie du Chien Group contributing to the well's capture, as inferred from the groundwater model results, represents less than 5 percent of the well's discharge. 2.3. Uncertainty Analysis f ' Groundwater models were used to delineate the City of Lake Elmo capture zones. These models tried to incorporate the salient features that make up the complex hydrogeologic setting of the Lake Elmo area. These models, however, are based on the assumption that the flow in the simulated aquifers can be approximated by that in porous media, and that the parameters describing the aquifer properties are .. known with a degree of certainty. The 10-year travel time capture zone delineated for Lake Elmo Wells 1 (208448) and 2(603085)for I the base-case scenario used transmissivities estimated from a pumping test conducted at Oakdale ` municipal Well 5 (127287). The pumping test conducted yielded a tight range in the transmissivity of the Jordan Sandstone in that area. However, this well is located more than 4.2 miles from Lake Elmo Well 1 (208448), and more than 6.3 miles from Lake Elmo Well 2 (603085). As a result, the conditions at the Oakdale well may not be representative of those occurring near the Lake Elmo wells. . In addition, uncertainty exists as to the hydraulic conductivity of the FIG Aquifer. To assess the L impact of this uncertainty on the computed capture zone, a sensitivity analysis was performed by increasing (decreasing) the values of horizontal hydraulic conductivities of the Prairie du Chien Group, Jordan Sandstone, and FIG by 50 percent. The changes in the delineated W14PA due to these , variations are depicted in Figure 19. As expected. the WHPA is fairly sensitive to the increase in horizontal hydraulic conductivity. A larger value of the horizontal hydraulic conductivity yields a L_ thinner but more elongated WHPA. l .: As discussed earlier, the porous media assumption may not hold true, at least for.the Prairie du Chien Group. Flow in the Prairie du Chien Group near Well 2 (603085) could be domnated by secondary porosity, owing to the occurrence of fractures,joints, and solution cavities, especially in shallow l bedrock settings. To err on the conservative side, the delineation of the 10-year time of travel capture r zone for Well 2 (603085) was also conducted using the fractured rock approach. The fractured rock ; approach delineation uses more conservative assumptions. It assumes that the porosity of the Prairie du Chien Group is only 5 percent. As a result, it yields larger delineations that often include all delineations based on porous media assumptions. 2.4. Composite Wellhead Protection Area The final wellhead protection areas for the City of Lake Elmo wells are constructed as a composite of It the WHPAs derived from the porous media approach delineation (augmented by the areas defined in the uncertainty analysis,as described in Section 3.3), and the fractured flow delineation approach. The f.. proposed WHPAs are depicted in Figures 1 A and 1 B. 2.5. Conjunctive Delineation A conjunctive delineation involves considering surface waters in making the final wellhead protection area delineation for wells under the influence of surface water. The consideration of a conjunctive delineation is usually triggered whenever a surface water feature occurs within a highly vulnerable , portion.of the delineated capture zone(MDH,2005b). In the case of Lake Elmo,there are no such ` -areas. 10 1 . Lake Elmo appears to intersect the capture zone (Figure 19) of Well 1 (208448). However, the capture zone that extends closest to the lake in Figure 19 is that of the Mt. Simon Aquifer.,which is i encountered at greater depth than the Jordan Sandstone or Prairie du Chien Group Aquifers, and protected by more than 100 feet of the confining Eau Claire Formation. There is also a pond, within an area of high vulnerability,just west (and outside) of the fractured flow delineation for Well 2(603085). The hydraulic connection between this pond and the horizon in which Well 2 (603085) is open in the Prairie du Chien Group is unknown. Well 2 (603085) is completed in the combined Prairie du Chien-Jordan at depths of about 182 to 285 feet. The distance to the well open hole through overlying unconsolidated materials and bedrock offers some hydraulic separation. The groundwater model indicated that the recharge occurring within the fracture flow capture zone does not sink sufficiently to reach Well 2 (603085). The recharge water contributing to Well 2 (603085) originates further upstream of the pond. Nitrate was detected in Well 2 (603085) at a maximum concentration of 2.6 mg/l. However, this level Icould as well be associated with the moderate vulnerability status within the DWSMA. Although a conjunctive delineation is not warranted, recommendations are made in Section 6 to further, investigate the potential influence of the pond on Lake Elmo Well 2 (603085). I ' 3. Delineation of the Drinking Water Supply Management Area The proposed Drinking Water Supply Management Areas (DWSMAs)are shown on Figures I and 1B. The DWSMAs were defined by using city streets, highways, and public land survey section lines. 4. Vulnerability Assessment [ 4.1 . Assessment of Well Vulnerability This part documents the vulnerability of the wells used by the public water supplier and is required under Minnesota Rules 4720.5210, The protocol for determining well vulnerability is defined in the MDH document entitled Methodology for Phasing I-Yells info Minnesota's Wellhead Protection Program (1998),which was approved by the U.S. Environmental Protection Agency as part of its review of Minnesota's wellhead protection program description. The MDH uses the protocol to maintain a database defining the potential vulnerability of community and noncommunity water supply wells. A score is calculated for each well using 1) construction criteria defined in the State Well Code, 2)geologic sensitivity, and 3)the results of water quality monitoring conducted by the MDH. A numeric score is assigned to each well based on the results of the three areas of evaluation. A cutoff score is used to define wells that are most likely to be vulnerable based on their construction, geologic setting, and sampling history. The print-outs of the Vulnerability ratings for each well are presented in Appendix B. Based on the results of the well vulnerability assessments: + Well 1 (208448) is not considered potentially vulnerable due to its construction and/or geologic - conditions at the well site, Well l (208448) meets current well construction standards and, therefore,the well does not serve as a potential pathway for contamination to enter the public water supply system. Il Well 2 (603085) is considered potentially vulnerable due to its construction and/or the geologic conditions at the well site, Well 2 (603085) meets current well construction standards and, therefore, the well does not serve as a potential pathway for contamination to enter the public water supply. However,the presence of nitrate at low levels in historical samples from the well could indicate that the well pumps groundwater that is, or may be, impacted by human activities. As such, the well is considered potentially vulnerable to contamination. 4.2. Vulnerability Assessment for the Drinking Water Supply Management Area The Prairie du Chien-Jordan Aquifer was evaluated for its vulnerability to contamination throughout the extent of the DWSMA on the basis of geologic logs from wells, and chemical data described in this report. Six geologic cross-sections that pass through the City of Lake Elmo wells were constructed (Figures 5 to 11). In addition, geologic logs for the wells in Figure 21 were reviewed for the'presence of low hydraulic conductivity material cover(i.e., clay)in the overlying quaternary deposits, The vulnerability ratings of the bedrock aquifers within the DWSM.As reflect the likelihood that water, and any associated contamination, can reach the aquifers within a given time period via vertical infiltration. This was done in accordance with the DNR guidance for assessing geologic sensitivity (DNR, 1991), as recommended by MDH for vulnerability assessments in DWSMAs: e A vulnerability rating of high suggests travel times on the order of weeks to years. This rating is applied where the aquifer has little to no effective geologic protection and the water table is greater than 20 feet from the land surface. Overlying clay is generally not present unless it is either very thin (less than 10 feet) or is restricted to the uppermost 10 feet, where it is likely compromised by weathering and secondary porosity. If it extends below 10 feet, it is described as weathered (e.g., yellow) on drillers' logs: This description fits the high vulnerability areas for Lake Elmo Well 2 (603085), depicted in Figure 22. Relatively rapid recharge can be expected to the Prairie'du Chien-Jordan Aquifer in these areas, due to the lack of geologic protection. 4 A vulnerability rating of moderate implies travel times on the order of years to decades. This rating is applicable where overlying geologic protection is present, but must include at least a 20-foot thickness of sandy clay or clay with some other coarser grained material,or wells finished in the underlying aquifer show the presence of relatively young water based on methods such as tritium analysis. The togs for the CWI wells seem to indicate the presence of gravelly or bouldery clay till, ranging in thickness from 20 to 140 feet, but generally around 40 to 80 feet. Most of the DWSMA for Well 1 (208448) fits this description and can be rated moderately vulnerable to contamination (Figure 22). The vulnerability maps of the two DWSMAs are shown in Figure 22. 5. Conclusions and Recommendations for Future Improvements The WHPAs were delineated using conservative pumping rate assumptions. Maximum observed or projected pumping rates were used for each city well as if the wells were continuously pumping at these maximum rates. These pumping conditions rarely occur simultaneously or, if they occur simultaneously, will only prevail for a limited amount of time (i.e., generally for hours or, at the maximum, days at a time), The WHPA delineation rules call for the use of these maximum pumping conditions as if they exist continuously during the whole 10-year period on which the delineation is 12 based. The assumption that these extreme pumping conditions exist simultaneously and on a continuous basis,provides for an additional safety factor that is built in the WHPA delineation process to offset the uncertainty that always exists when natural hydrogeological settings and processes are l modeled. The delineation of the 10-year time of travel capture zone for Well ? (603085) is sensitive to the nature Iof the actual flow in the Prairie du Chien Group. To err on the conservative side, a fracture flow delineation also was used that applied more conservative assumptions. The WHPA delineations also tried to account for uncertainties in transmissivity values around Wells l (208448) and 2 (603085). However, as with all WHPAs, these delineations are based on the best information obtainable at the time and should be re-evaluated as new information becomes available. Specific recommendations for future improvements to these delineations are: • Recommendation 1: Surface water/Groundwater Exchange Because of uncertainty about the imerconnection between the pond in the high vulnerability area and the water pumped by Lake Elmo Nk*ell 2 (603085). the city and MDH should investigate the importance of pond water in the well. The NIDH will assist the city with interpreting the data collected as a result of implementing this recommendation. NIDH recommends using the investigative techniques described below to determine surface water and groundwater interactions. The city and MDH should collect «eater samples from City Well 2 (603085) and the pond and I have them analyzed for stable isotopes of ox\gen (O'") and deuterium (H'). MDH will pay for the analytical costs. The deviation from the Global Meteoric Water Line, if any, would be indicative of mixin,with surface water from the pond. for which a strong evaporation signature is expected. y • Recommendation 2: Contribution of Shallow Versus Deep Aquifers in Lake Elmo Well 1 (408448) An assumption was made on the amount of water pumped from the aquifers at Lake Elmo Well I (208448). The pumping rate was distributed across the different aquifers based on assumed aquifer transmissivity. Future improvement Should include refining the determination of the water pumped at Well 1 (208448) from the Prairie du Chien-Jordan, FIG, and Mt. Simon Aquifers, We recommend including a nonitoring program in Part 11 of the WHP plan for the City of Lake Elmo wells to investigate the relative contribution of the deep aquifers. This plan should include collecting samples from Lake Elmo Wells 1 (208448) and.2 (603085) and analyzing for tritium. The well water should be analyzed for its tritium content using an enriched detection method to determine whether there is a significant component of aquifer water coming from the infiltration of precipitation. No tritium was detected in the FIG well in nearby Bayport. If we assume no tritium is present in the FIG and Mt. Simon Aquifers at Lake Elmo Well 1 (208448) and that the tritium concentration treasured in Lake Elmo Well 2 (603085) is representative of the Prairie du Chien-Jordan Aquifer, a mass balance approach performed on the tritium concentration measured at Well 1 (208448)can help bracket the relative contribution of the FIG and Mt. Simon Aquifers to Well 1 (208448). 13 i r. ^ I • Recommendation 3: Subsurface Condition Future improvement of the model should include revisiting the modeled hydraulic conductivities near Well 1 (208448) whenever new aquifer test data, closer than Oakdale Well 5 (127287), is available. Deep wells installed in the area should have their logs evaluated.to address deficiencies in the geologic information. In articular, the City of Lake Elmo distribution and quality of subsurface �eologr p tY should verify the locations of wells that are constructed within a two-mile radius of the DWSMAs as part of the process for amending their WHP plan. The MDH compiles the records for newly constructed wells beca use water well contractors submit this information to MDH. The City of Lake Elmo should also verify the locations of these wells. a 6. Selected References A Barr Engineering Company, 2005, "Interco mmunity Groundwater Protection: Sustaining Growth and Natural Resources in the Woodbury/Afton Area, Report on Development of-a Groundwater Flow Model of Southern Washington County, Minnesota," 66 p. Falteisek, J., 1991, "Criteria and Guidelines for Assessing Geologic Sensitivity of Ground Water Resources in Minnesota,"Minnesota Department of Natural Resources,Division of Water, 122. ' p• l•li Hansen, D.D., and J.K. Seaberg, 2000, "Metropolitan Area Groundwater Model Project Summary- Lower.Aquifers Model Layers 4 and 5." Version 1.00. Fn Kanivetsky, R. and J.M. Cleland, 1990, "Hydrology,"in Swanson and Meyer(eds.), Geologic Atlas Washington County,Minnesota, County Atlas Series, Atlas C-5: Meyer, G.N., R.W. Baker, and C.J. Patterson, 1990, "Surfician Geology," in Swanson and Meyer (eds), Geologic Atlas Washington County. Minnesota," Minnesota Geological Survey, County Atlas Series,Atlas C-5. # ' Minnesota Department of Health, 1998, "Methodology for Phasing Wells into Minnesota's Wellhead d Protection Program." Minnesota Department of Health, September 8, 2005a, "Guidance for Delineating Wellhead l - in Minnesota." Draft. y Protection Areas in Fractured and Solution-Weathered Bedrock Minnesota Department of Health, September 2005b, "Guidance for Preparing a Conjunctive Delineation,"Draft. y Mossler, John H., 1972, "A Paleozoic Structure and Stratigraphy'of the Twin City Region," in P.K. Sims and G.B. Morey (eds.), Geology of Minnesota: A Centennial Volume, Minnesota Geological Survey, pp. 485-497. Mossler; J.H. and R.G. Tipping, 2000, "Bedrock Geology and Structure of the Seven-County Twin Cities Metropolitan Area, Minnesota," Minnesota Geological Survey, Miscellaneous Map Series, Map M-104. Palen, B.M., 1990, "Quaternary Hydrogeology."plate 5 in Balaban, N.H. and Hobbs, H.C., (eds.), Geologic Atlas of Dakota County. Minnesota, Minnesota Geological Survey. d 14 i Selected References Page 2 i p Runkel, A.C.. R.G. Tipping and J.H. MossEet, 2003, Geology in Support of Groundwater Management for the Northwestern Twin Cities Metropolitan Area," Unpublished Minnesota Geological Survey Report to the Metropolitan Council. Runkel, A.C, R.G. Tipping, E.C. Alexander Jr., S.C. Alexander, 2006, "Hy drostrati graph i c Characterization of Intergranular and Secondary Porosity in Part of the Cambrian Sandstone Aquifer System of the Cratonic Interior of North America: .Improving Predictability of Hydrogeologic Properties," Sedimentary Geology, 184, pp. 281- 304. Schoenberg, .M.E., 1990, "Effects of Present and Projected Ground-Water Withdrawals on the Twin Cities Aquifer System, Minnesota," U.S. Geological Survey, Water-Resources Investigation Report 90-400t, 165 p. . Seaberg,J.K.,2000, "Metropolitan Area Groundwater Model Project Summary-Overview of the Twin Cities Metropolitan Groundwater Model, Version 1.00," Minnesota Pollution Control Agency. Swanson, L. and G.N. Meyer (eds.), 1990, Geologic Atlas of Washington County. Minnesota, Minnesota Geological Survey, County Atlas Series, Atlas C-5, 7 plates. Tipping, R. G., and G. N. Meyer, 1998, "Mapping Buried Glacial Deposits in Washington County, l Minnesota-Applications to Hydrogeologic Characterization of Glacial Terrains," Minnesota- Geological Survey, University of Minnesota, t l : l- I ! 15 Tables �� 11 i 1 `` 1 �\ 1 1 11 \ . J \ . F � . � \ \� � ■ � � N � / '\ � \ » « t � � t:5k \ƒ � f \ . .� a \ � \ � \ � a to. ul r u0c 5 NtD o tQ �• � N r N r :� ,p ✓ r o tt9 O N A Y N N �rj r w c0 0 t9 i Cj 4? $ N Ul p (P co 0 p o j o o d C lo ** N O N `o r9 CIO, 0 r tM to o y Oa v co o C N o ~ r d C C ti O v 1 O }. N N h p c N L M '•t W t0 t� �' J L m L W G Q) N N a a W N p N N GJ N W p W N W ti w � T J T T T T J a a a O O ? E J C J J J .J J C E E E p O O 07 _� O T •O O pV_p,, C V V VQQ V V C J O •O O O V Z Z T b > T T ? Z Z Z C J ❑ '} F N F 1-- 1••• �- 1- y Qi OLL Q F J J C4 C = O b y V U c L a L a L a > S QZ A E a a '� v .5 a .3 c 4 7 w 5 c N p . v n 'o c O Q Q to ,Cy Ce) S ❑ a, = Q 7 ti O W O O x ¢ n ¢ Q a J O O m V) a -o LQ L yW a a � `0 hS ti ti y m —ao L9s O w � - 3 � � a� ,"�{ •c 01 To ICJ r- aj u tR c E u O a aT— Ern_ E Eo of or Pj G V O ❑ g ' a o a N g o O b. n Q o c^ E Qa c _ r Lw= _ tu E s C N C y L m v o E v c c �� Vy s o N r A a Li O m �- cN Ro 'per = 0 O ¢ d d a y a coi to c) E to � s LLl p ❑ p o + O p a ' u. - w a w U � 0 V zs �o c W V 1 O v q [ ■ � [\ \ / \ \ \ / / \ J - ■ & « � 2 $ / / g - a E 0 w E @ \ / m / / / ° / o 0 R « Q a m e § 2 m m m w e E p m j / 0 / / \ \_ ( 0 a ] ( = . (: _ a• a o m $ 9 [, 6 (� n � ■ © . h \ % / / 7 7 L � % /\ / 8 / — Q . �. m cr � [` \ o ] . r- (: p o m & p, O -n 2 — w g�0 } § / ƒ � k / \ o m / \ H i 0 0 t � / 5 f ® / Eto U ® I \ \ » m 2 (D y % • C) ul \ Ul C) « Q CL b b Lrl � � . ! ( , / . } / . - . . ,D� a f , q 2 � 2 \ \ ca 2� _o J2 LO » 2 7 © a £ ■ cc \ to $ 2 cu � 2 ± c ¢ - / \ E @ _ n / \ t 2 &2 � o� w . E / . / . . / . / . . 1 1 Figures f J 1 1 ' 22 i Appendix A - Well Logs 1 _o I 1 Unique Well Number County Washington MINNESOTA DEPARTMENT OF HEALTH Entry Dale 1989107r11 20844$ Quad Lake Elmo WELL AND BORING RECORD update Date 2005/0111 Quad Id 102E MINNESOTA STATUTES CHAPTER 1031 Received Date ( Wellname LAKE ELMO 1 Well Depth Depth Completed Date Well Completed !I Township Range Dir Section Subsection Field Located MGS 29 21 W 13 CBCDA Elevation 935,00 ft. 805,00 ft 805,00 ft 1962/04/00 Well Owner LAKE ELMO 1 Drilling Method Cable Tool 3303 LANGLY CT Drilling Fluid Well Hydrotractured? I J YES NO LAKE ELMO MN 55042 Changed From ft.to Contact CITY OF LAKE ELMO Use Community Supply 3800 CAVERN AV N IJ Casing r e Steel black or log Drive Shoe? ; YES LAKE ELMO MN 55042 Changed yp ( NO Hole Diameter(tn.) Diameter 20 Depth 2$0 20,0(To 305,0 20.00 ln.from0.00 to 250.00 ft. Ibs,ft Description Color Hardness From To(ft.) SANDY CLAY 10 1 12 SAND 112 32 SAND&GRAVEL I 32 72 Screen No Open Hole(ft.) From 280,C to 805,0 1I Make Type 4 CLAY BROWN I 172 82 Dlamter Slot Length Set CLAY BLUE 182 97 CLAY,BROWNISH-RED 197 1 112 HARDPAN i 1112 162 FINE SAND 1152 167 ROCK&CLAY 1167 222 CLAY,GRAVEL&ROCK I 1222 253 Static Water Level (Mulliple SWL) CLAY,GRAVEL&ROCK I 1253 257 110,00 it, Land surface Date measured 1962!04/00 f SANDROCK I I257 1 272 Pumping Level(below land surface) l SANDROCK&SHALE I 1272 1 297 153.00 ft,after ins.pumpting 800,00 91p•m• SANDROCK&SHALE I 1297 307 Well Head Completion D Pllless adapter Model SHALE 1307 345 er manufacturer _ SHALE I I345 402 Casing Protection ,✓� 12 In.above grade �r At-grate(Environmental Wells and Borings ONLY) Basement offset SHALE&SANDROCK 1 402 1 513 ; SHALE&SANDROCK �513 570 Grouting Information Well grouted? ✓l YES NO I Material Neat Cement From 0,0 To 280,0it, SHALE&SOME SANDROCK 1 1570 669 t SHALE&SOME SANDROCK 1 669 682 SANDROCK&SHALE I 1682 1 748 SANDROCK _ I 1748 1 805 Nearest Known Source of Contamination feet Direction Type Well disinfected upon completion? [j YES L J NO Pump C Not installed Date Installed Manufacture's name Model number HP Volts Length of drop pipe Material Capacity g.p.m Type Turbine Remarks Abandoned Wells GAMMA LOGGED&TV 11-30-1998. Does property have any not In use and not sealed well(s)? r YES C NO Variance Was a varlanco granted from the MDH for this well? -Ell YES ❑ NO Well Contractor Cerficatlon Keys Well Co. 62012 License Business Name Lic.or Reg No. First Bedrock CJDN Aquifer Jordan Mt.Silnon JOHNSON.. R. Last Strat CMTS Depth to Bedrock 253.00 ft. County Wrll Index N 5 REPORT Printed on 23/05/2007 Name of Driller Date HE-91205-07(Rev.2199) Unique Well Number County Washinglon MINNESOTA DEPARTMENT OF HEALTH Entry Date 2001/1 1120 6o3os5 Quad. Stillwater WELL AND BRING RECORD Update Date 2007/05/15 Quad ld 118D MINNESOTA STATUTES CHAPTER 1031 Received Date Wellneme LAKE ELMO 2 Well Depth Depth Completed Date Well Completed Township Range Dir Section Subsection Field Located MGS 29 20 W 6 CBBBBC Elevation 940,00 ft. 285,00 ft 285,00 ft 2001/09118 Well Owner LAKE ELMO 2 Drilling Method Cable Tool 55TH ST N Drilling Fluid Well Hydrofractured? -_ Yes ✓] No LAKE ELMO MN 55042 Changed Bentonite I From ft,to Contact CITY OF LAKE ELMO Use Community Supply 3800 LAVERN AV N Casing Type Steel(black or loA Drive Shoe? 9 YES El NO Hale Diameter(in.) LAKE ELMO MN 55042 Changed Diameter 18 Depth 162 24,0(To 285.0 24,00 in,from0,00 to 108.00 ft. 94,621bs1fl 18,00 In.from0.00 to 182,00 ft. 70,591bslfl L- Description Color Hardness From I To(ft.) SAND/ROCKS BROWN JSOF7 10 148 L CLAY IRED ISOF-7 148 1 62 GRAVEL YELLOW SOFT 62 108 Screen No Open Hale(ft.) From 182,C to 285,0 Make Type LIMESTONE IYEUTAN (HARD I10B 187 Diamter Slot Length Set 4. SANDSTONE IYELLOW IMEDIUM 187 197 LIMESTONE IYELLOW (HARD 1197 1 200 SANDSTONE YEUORN IMEDIUM 1200 275 SHALE IGRAY IMEDIUM 1275 1 285 yt Static Water Level L._ 51,70 ft. Lard surface Dale measured2001/09/05 Pumping Level(below land surface) ( ' i 80,00 It.after 8.00 hrs.pumpting 1000,00 9-p-m. i- Wall Head Completion Pitless adapter manufacturer Model ❑ Casing Protection a r, 12 In.above grade UAI-grate(Environmental Wells end Borings ONLY) u easement offset Grouting Information well grouted? D YES ❑ NO Material Neat Cement From - 0,0 To 182,0fL 16,00 Cubic yards �^ l ti Nearest Known Source of Contamination 150 feet W Direction BOW Type Well disinfected upon completion? ❑✓ YES ❑NO Pump U Not Installed Date Installed Manulacture's name Model number HP Volts - Length of drop pipe_Material Capacity g.p.m _ Type Abandoned Wells � Remarks Does property have any not in use and not sealed well(s)? ❑ YES L'J NO l� M.G.S. NO.4168. Variance Was a variance granted from the MOH for this well? ❑ YES Z NO Well Contractor Cerfication Keys Well Co. 62012 License Business Name Llc.or Reg No, First Bedrock OPOC Aquifer Pralrle Du Chien-Jordan ALLAN,J. Last Strat CSTL Depth to Bedrock 108,00 ft. Cuunry Well ind,:x r-s REPORT Printed on 23/05/2007 Name of Driller - Date HE-CIPOS-07(Rev.vea) F Unique Well Number County Washington MINNESOTA DEPARTMENT OF HEALTH Entry Date 2003/01/23 655914 Quad Lake Elmo WELL AND BORING RECORD Update Date 2007i03109 Quad Id 102E MINNESOTA STATUTES CHAPTER 1031 Received Date Wellname LAKE ELMO 3 Well Depth Depth Completed Date Well Completed Township Range Dir Sectlon Subsection Field Located MDH 29 21 W 33 DDAADD Elevation 1004.00 ft. .422.00 ft 422.00 ft 2002/12/30 Well Owner LAKE ELMO 3 Drilling Method Cable Tool 8650 HUDSON RD Drilling Fluid Well Hydrofractured? I YES ❑ No LAKE ELMO MN 55042 Changed Water From ft.IQ Contact CITY OF LAKE ELMO Use Community Supply 1 3800 LAVERNE AV N Casing Type Steel(black or low Drive shoe? iLI YES _NO Hole Diameter in.) j LAKE ELMO MN 55042 Changed Dlameler 24 Depth 29,0(To 422.0 30,00 In.from0.00 to 97.00 ft. 118,761bs,'It 24,00. In.fram0.D0 to 281 0011. 94,71 1bs;ft Description Color lHardness From To(ft.) SAND,GRAVEL,CLAY I BROWN ISOFT 10 90 SANDROCK YEL/WHT IMEDIUM 190 1 193 11 LIMESTONE(BUFF) (HARD 1193 340 Make en No oppnHote(tt.) From 2131,Cty 422,0 4 SANDSTONE YEL/WHT (HARD 1340 1 418 Dlamler slot Length Set I SHALE IGRAY IMEDIUM 1418 1 422 1 Static Water Level 1 125.00 ft, Land Surface Dote measured 2002/12/30 Pumping Level(below land surface) 152,00 it.titter 8.00 hrs.pumpting 1200,00 g•p•m• Weft Head Completion Pltless adapter manufacturer Moodie! Casing Protection r1I 12 In.above grade I{ _! AI-grate(Environmental Wells and Borings ONLY) El Basement offset Grouting Information well grouted? Lj YES ❑ NO Material Neal Cement From 0.0 To 281,Oft. 32,50 Cubicyards { I Nearest Known Source of Contamination 200 feot N Direction SDF Type Well disinfected upon completlon? Lv YES ❑NO Pump Lj Not Installed Date Installed I Manufacture'e name Model number HP Volts Length of drop pipe Material Capacity g.p.m Type Remarks Abandoned Wells Does property have any not in use and not sealed well(s)? L II YES NO Variance Was a variance granted tram the MDH for this well? YES ❑✓ NO Well Contractor Cerfication Keys Well Co. 62012 License Business Name Lic.or Reg No. First Bedrock OSTP Aquifer Prairie Ou Chien-Jordan ALLEN.J. Last Strait CJDN Depth to Bedrock 90.00 ft. coum v Well Index e.5 REPORT Printed oa 23/05/2007 Name of Driller Date HE-01205-07(Rev.2I99) 7 I 1 Appendix B - Well Vulnerability Assessments I� i t� l Si M I M N E—So T A MINNESOTA DEPARTMENT OF HEALTH SECTION OF DRINKING WATER PROTECTION DEPARTMfHTOFREALTN SWP Vulnerability Rating 625 Robert St.N.St.Paul MN 55155 I P.O.Box 64975 St,Paul MN 55164-0975 PWSID: 1820009 TIER: 4 SYSTEM NAME: lake Elmo WHP RANK: WELL NAME: Well#1 UNIQUE WELL#: 00208448 COUNTY:Washington TOWNSHIP NUMBER, 29 RANGE:21 W SECTION: 13 QUARTERS:CBC 1 CRITERIA DESCRIPTION POINTS Aquifer Name(s) Jordan-MLSimon DNR Geologic Sensitivity Rating Very low 0 L Score 17 Geologic Data From Well Record Year Constructed 1961 Construction Method 5 Casing Depth 280 $ Well Depth 808 Casing grouted into borehole? Unknown 5 Cement grout between casings? Not applicable 0 All casings extend to land surface? . Yes 0 Gravel.packed casings? No 0 Wood or masonry casing? No 0 Holes or cracks In casing? Unknown 0 Isolation distance violations? 0 Pumping Rate 500 5 Pathogen Oetecled? 0 Surface Water Characteristics? 0 Maximum nitrate detected 1.5 0511112005 10 Maximum tritium detected Unknown 0 Non-THMS VOCs detected? 0 Pesticides detected? 0 Carbon 14 age Unknown 0 Wellhead Protection Score 30 Wellhead Protection Vulnerability Rating : NOT VULNERABLE J Vulnerablitty Overridden t COMMENTS I . Date Report Generated:23/05/2007 Page: 1 i M 1 8 N E S O T A MINNESOTA DEPARTMENT OF HEALTH SECTION OF DRINKING WATER PROTECTION DEPARTMTN10f HEALTH SWP Vulnerability Rating 625 Robert St.N.St.Paul MN 55155J' P.O.Box 64975 St.Paul MN 55164-0975 PWSID: 1820009 TIER: 4 �. SYSTEM NAME: Lake Elmo WHP RANK: WELL NAME: Well 42 UNIQUE WELL#: 00603085 COUNTY:Washington TOWNSHIP NUMBER: 29 RANGE:20 W SECTION: 6 QUARTERS:CBB CRITERIA DESCRIPTION POINTS i Aquifer Name(s) Prairie Du Chien-Jordan a f; DNR Geologic Sensitivity Rating High VULNERABLE tly; L Score 0 Geologic Data From Well Record .�. Year Constructed 2001 Construction Method Cable Tool/Bored 0 ' Casing Depth 182 10 L Well Depth 295 Casing grouted into borehole? Yes 0 1 Cement grout between casings? Yes 0 All casings extend to land surface? Yes 0 ' Gravel-packed casings? No 0 Wood or masonry casing? No 0 � Holes or cracks in casing? Unknown 0 ,a Isolation distance violations? 0 Pumping Rate 1000 10 ]` Pathogen Detected? Surface Water Character!stics? 0 Maximum nitrate detected 2.6 08/16/2004 10 a Maximum tritium detected Unknown 0 Non-THMS VOCs detected? 0 Pesticides detected? 0s Carbon 14 age Unknown 0 Wellhead Protection Score 30 Wellhead Protection Vulnerability Rating : VULNERABLE Vulnerabll}ty Overridden Jim Walsh COMMENTS The thin red clay in the well record was not given credit as a confining unit because it is probably leaky Superior lobe till. N Date Report Generated:23/05/2007 Page:2 M I N N E 3 0 T A MINNESOTA DEPARTMENT OF HEALTH SECTION OF DRINKING WATER PROTECTION � ---' DEPARTMENT OF HEALTH SWP Vulnerability Rating '1"'.p41° 625 Robert St.N.St,Paul MN 55155 P.O.Box 64975 St.Paul MN 55164-0975 PWSID: 1820009 TIER: 4 SYSTEM NAME: Lake Elmo WHP RANK: WELL NAME: Well#3 UNIQUE WELL#: 00655910 COUNTY:Washington TOWNSHIP NUMBER: 29 RANGE:21 W SECTION: 33 QUARTERS:DDA CRITERIA DESCRIPTION POINTS Aquifer Name(s) P airie Du Chien-Jordan DNA Geologic Sensitivity Rating Low 20 L Score Geologic Data From W211 Reoord Year Constructed 2002 Construction Method, Cable Tool'Bored 0 Casing Depth 281 5 Well Depth 422 Casing grouted into borehole? Unknown 0 Cement grout between casings? Yes o All casings extend to land surface? Yes 0 Gravel-packed casings? No 0 ' Wood or masonry casing? No 0 Holes or cracks In casing? Unknown 0 Isolation distance violations? 0 - Pumping Rate 1200 20 Pathogen Detected? 0 , Surface Water Characteristics? 0 Maximum nitrate detected Unknown 0 Maximum tritium detected Unknown 0 Non-THMS VOCs detected? 0 Pesticides detected? 0 Carbon 14 age Unknown 0 Wellhead Protection Score 45 Wellhead Protection Vulnerabillty Rating : VULNERABLE Vulnerability Overridden 1 COMMENTS 1 I I 1 Date Report Generated:23115121107 Page: 3 i �• a �� View: Figure 1 - DWSMA ' A Lake Elmo Wells � ' , '' - -.! y "":, s, ••- ; ,• Emergency Response Area WHPA " DWSMA .. e Well 1 6 �. : 1 r. ..�'=""�( e '�!�t• + ,+ 1000 0 1000 Feet r Blown-Up Area k, f �„� �<i+`gip'l . _ ,� _•♦� 4 eL r .• 1 _ �" •1. 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CD W Cl) N > LL O) LL ,�, O r, > ° L`A co N O N J S to (� • m c •� cp i c -O • to C 07 co cn ^ O) co Ln Jx O TO O O O O O O O O 00 LO O)V O Ln O LO O LO O LIX) O s 00 00 1` co co LO LO o = Oco U) W `o r = s £ = c LL r o Local Model Regular Grid (50m) o a r o ---1 . ° O Lake Elmo Well 2 9 a ® 7 Lake Elmo Well 1 P o.` //_�� o a - Lake Elmo City of Lake Elmo ---. - 6 c 0 0 a i Om � a 4b XX Mill City Limit Local Model Extent St. Croix River Mississioni River Regional Model Grid MIN11E50TA Figure12 ' REGIONAL AND LOCAL MODEL GRIDS City of lake Elmo DEPARTMENToFHEALTH Regional Model Regional Model Calibration Statistics "t• (�• I Residual Mean C ••;jilif�'if!lj�llif' •• Residual Standard Dev. -7.5P Residual Sum° I •�• !!qi!n i•.•• { of Squares 6.98e•004 m •• I-._._...------_-----..,,_..---__.._.._...-...._..--•---------------._�_-�._ Z. jf -•�� • ----_..__ Absolute Residual -3305 F I i °j••�44:i;!•!•i Maximum Residual -37.07 ! serve an in ea -94.70 i •` ;fJ,�•f�l�°: °�••.� i Res.Sid.Dev.%Range 0 079 Observed Head Local Model Local Model Calibration Statistics ResiduelMean --1.93 :As __-•_—_ - --__—_— .: �-C_ _1_i ,j _ —!f Residual Standard Dev. ! )L •4.79 C in ° ' ' t .• f . Residual Sum of Squares •9.30e+003 Absolute Residual Mean -4.12 ° Minimum Residual .-2p,2q rn Maximum Residual =10.66 p Observed Range in Head -47.20 l . _ s !� 't e •' f{ Res.Sid.Dev./Ronge -0,102 e ° 4 : j' . E .• _; d i .. • 'e . r • •. . J Ms 1 ]j ° f • ° d I •� I — i Observed Head F iNNES0TA Figure13 ' REGIONAL AND LOCAL MODEL CALIBRATION COMPUTED VS OBSERVED HYDRAULIC HEADS DEPARTMENToFHEALTH City of lake Elmo i Layer 3 —Prairie du Chien Sao = C. Head Contours are in Meters • p� N ry 9rn 0' • •NN ., Layer 5 N Jordan Sandstone y' Csnd'-• 0�' .A6 r ry c) N h N �• N 2� N S -.�•� 238 2 Scale: 1 inch=6 miles / Figure 14 M I N N E S 0 T A CALIBRATED HYDRAULIC HEAD CONTOURS IN THE PRAIRIE DU I CHIEN DOLOMITE AND JORDAN SANDSTONE REGIONAL MODEL DEPARTMENToFHEALTR City of lake Elmo Head Contours are in Meters I b • o e� / �o d � o 7 � 9� ,,� � e� •Q O 4 `� ti7d1�1 [y ° 0 � a � d p ` 0 i lZa r W r•_ I e• � b `6 � G Scale: 1 inch=4 miles Figure 15 M I N N E S 0 T A I CALIBRATED HYDRAULIC HEAD CONTOURS ' IN THE FRANCONIA-IRONTON-GALESVILLE AQUIFER REGIONAL MODEL City of lake Elmo DEPARTMENTOFHEALTH ;�J=• r�a-=;�� ,:,` , � � , , '> �,° �� `�+,=' I Jf ':.y--��=:; � r View: Figure 16A Heads OPDC City of Lake Elmo Wells � �•.✓i :r � r'';; :,�� fir• i � /` `• ,. v; ,�i�Tg."I rSt �.�`, ^.,�1i1��`r_.�i• Sri. ,il� 3,..• i�1— }� = i.._ p, c`z-sat; ', :.�• r 1 r _ — Head Contours-Prairie du Chien Measured Heads OPDC(CWI) 87 .2 1.- d�'-�r#. !•'3'i-'�. } '�4'na�y(- .iNti;: =SL'. `�•:� d - .-.It ::.. ;.,i� ;4•..1.� '•'}rrQ .:I� Lako v,S •1..:. ':: �g�� ':..+�'"_-81� Jr tiff 'i. .F- :: ���,}/1.l r;;V•.a�;_�"�:j„r •t'�i+:w 1, B' P .,..'s-1 i r �j;"+_ .r.:..>-�•i' r'r. r ,J a "• s� t-!,;f �al �I`-`!i( + i �t � .r..� ! ' - ,•-'^;^a.�� .til S , t`1;... `" 4�,���C�l 9'J"�"° ,•7 r I, Y�:_C*� i oQpL'�+ LN /'�iy r, 24 74 r 2000 0 2000 Feet �I w 798 f _ 43718 j 9 30 S11�q,iit�5 1 \ ?�i-. Y -•....< 1 t _ -f t••s—^-�- 11 -y �:;r�� - �. .Y � I 8v ram�•,,, ��, ,�/I ` I ' .� •' tl/aft.: ': ' ' 2 .t w IF'!} - �=:1 , ' 3S- r qa �� t1 _ k},., !n r,: �F�iSy�4x �t ,✓J,}` ., 5 , �; ra F t Blown-Up Area �`,..,•' _ .,._i�fi r I/n, 1 � � it r _i•..t ^ `- � /� _.�]J.-.S ✓t � ¢ �.'L^' � �,�j_ p; Y.}J � ll y - � ..t;.:i:�:?: �'.• fCccr'��" d�,y,i 1, u.- , ' �^r Y�,�� • Y 4. A. tw:, --'0.r � •`'l5� ��\i�,r�f t{ 1'f)"t, i tr-��' / �`)C, a,.;� I yM a ;`�� -f` I.�' � G YT ,trJr.. 11_,`/ ..__. t _ x •4.',:' - ,3 l \;1 - .I.' _J.�a4`.7 l ) �'��,~4..._.. T.Y.,',L•`4 j• '•—- �-y�..}r.:i�,�G � ..� ,,``- �,'� •. 'Y- '� vt"a: ' '. i.ar., .. Ott',�, /'C.� .i '.�''Hi�'i,�el ,_�' �,'�,_ I i EIEIroaES0 Figure 16A CALIBRATED HYDRAULIC HEAD CONTOURS IN THE PRAIRIE DU CHIEN GROUP NEAR WELL 1 DE�ARTRtENiorHE L H (City of Lake Elmo) I I View: Figure 16A Heads OPDC +.`9 ( V{- :.',.!:' �� ? y' ;,, * City of Lake Elmo Wells Head Contours-Prairie du Chien Measured Heads OPDC(CWI) rj alllV�� I i \ o f y YYYiii N 2000 0 2000 Feet (` ��l fi �lam.•"f.� � nl 1. :� .��10 i O ..JW• \• Ste' �'�.�` .,c.� 17) - e� I�r`_ tJ � I '\,�� Y"?n''\ �C �,;� `�� dam' i / ,`•r u.a%- � "5„--'RJ ]r, A- Blown-Up Area . t q:'E� I I IIIAft L 87 S�_ J r- (� r �• � f �/.,r �'t o v _ t \ ,� 1 ,tea LAKE E41`/'. i MINNES0TA I Figure 16B ' CALIBRATED HYDRAULIC HEAD CONTOURS IN THE PRAIRIE DU CHIEN GROUP NEAR WELL 2 DEPARTMENTo1HEALTH (City of Lake Elmo) j Cr View: Figure 16C Heads CJDN flo I ............ City of Lake Elmo Wells 2�. < N Head Contours-Jordan 0 r 843.16 Measured Heads CJDN (CWI) t 1-11 AA V/ v4 LAe Elmo 3 V EL j, L A 1• j , cfib r Y. 1z Ot Af a at• t) } r 24 N 2000 0 2000 Feet 26 Blown-Up Area T \J "M MIN . ........ ............ A-i N E 5 0 T Al Figure 16C CALIBRATED HYDRAULIC HEAD CONTOURS IN THE JORDAN SANDSTONE NEAR WELL 1 UEPARTMENTOFHEALTHI (City of Lake Elmo) View: Figure 16C Heads CJDN City of Lake Elmo Wells 0 t , °r`>v � f F.��r I r ;G m Head Contours-Jordan " 843.16 Measured Heads CJDN (CWI) J '• 44. •-�-�( � �. � ice, , -� '�!` - r_ 1 Ip.l 4 }.lam_a' - 1 I so,S� 1a Ch,' ;f- iV) e. o is 2000 0 2000 Feet kc ".'I ...� ��/kit 1 �o�'t.' I /="- -�-- - tea- ?•r (,(] �. Blown-Up Area EIEno Id. C R 3 LMO t 0� i MINNES0TA Figure 16D ' CALIBRATED HYDRAULIC HEAD CONTOURS DEPANTMENTotH[ALTH IN THE JORDAN SANDSTONE NEAR WELL 2 (City of Lake Elmo) �Q'�' c l�S ' u _ View: Figure 17B - Heads� 0 City of Lake Elmo Wells v Head Contours-FIG Aquifer 843.16 Measured Heads FIG(CWI) 36 �, V x D CIE 10 It Ij n 1 9 99 _1U 2- 2000 0 2000 Feet E, 937 Blown-Up Area Im 9 A LMO 933 3� K E v ,1k, LACKWOOD 919 81-ACKWOOD 934 MIN11 1 1 0 T A I Figure 17B CALIBRATED HYDRAULIC HEAD CONTOURS IN THE FIG AQUIFER NEAR WELL 2 DEPAATNENTorNEALTN (City of Lake Elmo) Q c� Q a W (D E Q) v°i ° @ U) U 0 U ° o O o CO ° m O i° O Q ° W (a) LL p U) Z 12° U � o o E co W m ;U) r � �. W a a 0- — (D U cn `> o 1 t � W u) 4- o LL I M I a�i u- Q Q O, ' m 0 ��s U m a c � o cn C: 0 0 0 g W (j 0 N T N N a) I (D _ 0 _ ° � I— E a m N caa z� o W co co Q) U L L L Y m CD T Q) J n 0 Cl � U L r- y. m Mn OJ 4 rF L IL CD © ary ,/� — d --•� �-�-Q �•�,. ..,•ice. I �o a� o� t � o � � W LL o o ,,a, o w g U) g m 0 2 Rr 0 g z 2 o o o g c w 0 LL � C Q o + E c`!. I� Z Q 0 N a7 N N C ~ � w o -c o 0 a n m Z (� c0 m ar a) o. al = N N 0 N N N U 0 __ 2)w 0� 4— ^' O m 7 7 a d L d P- LL 0 L.L VJ E •n a n n(a cc m m m c a 0 �' uJ E CU U cU % T N Coo Z �- U os 0 w ' N a o aQ 0 U N =! IA O q � _4- r �.d.51• O 950 f 49� ?1 cl� `ID oo � = a E o p a� t6 `� LL p N ~ fII p ;_ 00 O N E Q E-• uz)l m LU z O N a _ - p �' U > g o a '~ OWLL IL W � p � �' �� �, . NSW N o LL �Q 3 x -l' 1 W i N r'n N C J 4- w a� m ' ' `*- U ii W UU Vu W N U W W Q - LL a_ � Q co 12 rl U u T�" '•j f`•� rn U ,.. o .t" V ,ltCN f•, LA .. ' dam. /- .w q;. ':�y�•T'.!^:::.: � .'i \!��. li mod•--' C. -, P�a � " •���,. _,•. . +� >T.�1 ���.�� Ff�',.f•� Jam, �' LC�]J ;G `� f •lye J■ r� "�} ,Y �� '. �., z _ 4 - - a o . j' ! fit.. u51��^� ,r,.,,t�'`'�`�a ,0 7.4'.�.k�,,,o..Vl'�'t/(.��\' �`•'. o � h� •�^k I 1 �• ., �� View: Figure 21 - CWI Wells cjd �> > Lake Elmo Wells �- _' 36 Well Log Reviewed ERA WHPA 56 151'- DWSMA 50,729 ell 2 15449 1637 50-6 ��-'�, ���-Ana ��'�c • . ,�1`.�`; l �n V' 4 40.j - C-Y • 2000 0 2000 Feet 41-53 20613 I, `f J W ell 1 ' 1Elm �.� gil --24, yANQ LIdO IRK 8k1 96 'e:" E 1 �� Blown-Up Area P.'�i�j� �-fir) �•-Jf (yI '1 .�1 ! rN �i'=�. '. 4 . ' `�, •l�'/� �� �\ �' '�.�. 'J ��919'-� 1� - 9L�LNW!)OOR t 531,4 D,y�'• � ��, e��!":G- �l 'it �a a_ ��}�' ;.: � -• '"�7.��ili�,Sc�T l,`:�r���' ',8... �,�/• .Il,`' -- �_ I�',unu ...t"b:FtiiY_� .r'.. � � MINNESOTA Figure21 ' CWI Wells Reviewed DEPAATMENTofHEAITN City of Lake Elmo) ,,,..E View: Figure 22-Aquifer Vulnerability 5��i •L.� vv. at 8 ~�1 1`' -�)�i rF Lake Elmo Wells •�l c 9 v ERA WHPA DWSMA DWSMA Vulnerability Well 2 High Moderate ® ' U_15 I-,AN 1 _ R � N J8 grA,„ S 2000 0 2000 Feet 9'__ —�� _ _ e - __._ LMO k fit. iR� 'Well 1 Blown-Up Area N All yLAKE EkAllp'.!'. `1\� /`I / •�` '� AIRPORTI:I�i i -D 9/8. SLACK WE - e � MINNES0TA Figure22 DWSMA Vulnerability DEPANTATENTofHFAITN (City of Lake Elmo) APPENDIX � l + CITY Or LAKE E MO City of Lake Elmo Wellhead Protection Plan Part II I Part 2: ■ Potential Contaminant Source Inventory ■ Impacts of Expected Changes to Land and Water Resources ■ Issues, Problems, and Opportunities ■ Wellhead Protection Plan Goals 1 ■ Management Strategies and Action Plans ■ Evaluation Plan ■ Emergency/Conservation Plan ■ IWMZ Data Date: July 18, 2008 Project No. 12781.001 TKDA 444 Cedar Street,Suite 1500 Saint Paui,MN 55101-2140 ENGINEERS ARCHITECTS•PLANNERS (651)292.4400 t, (651)292-0083 Fax www.tkda.com WELLHEAD PROTECTION PLAN PART II CITY OF LAKE ELMO, MINNESOTA PROJECT NO. 12781.001 TABLE OF CONTENTS PAGE NO, � l SECTION I. EXECUTIVE SUMMARY ...................................................................................................1 SECTION II. DATA ELEMENTS (4720.5200)....... 4 SECTION III. ASSESSMENT OF DATA ELEMENTS............................................................................10 SECTION IV. IMPACT OF CHANGES ON PUBLIC WATER SUPPLY WELL.......................................12 SECTION V. ISSUES, PROBLEMS, AND OPPORTUNITIES ..............................................................15 SECTION VI. WELLHEAD PROTECTION GOALS (4720.5240) ...........................................................21 f SECTION VII, OBJECTIVES AND PLANS OF ACTION (4720.5250).....................................................22 SECTION VIII. EVALUATION PROGRAM (4720.5270)...........................................................................36 SECTION IX. ALTERNATIVE WATER SUPPLY; CONTINGENCY STRATEGY(4720.5280)..............37 APPENDIX 1 , r I Lake Elmo Wellhead Protection Plan Part II i 12781.001 yLAKE ELMO WELLHEAD PROTECTION PLAN PART II APPENDIX 1 List of Tables Table 1 - Potential Contaminant Sources Table 2 - Average Precipitation Table 3 - Well Pumping Data List of Figures f Figure 1 - WHPA/DWSMA Map Figure 2 - Located PCSI J Figure 3 - Municipal Map Figure 4 - Soils Map Figure 5 Land Use Map Figure 6 - Zoning Map List of Exhibits Exhibit 1 - LUG List Exhibit 2 - Consumer Confidence Report Exhibit 3 - IWMZ Datasheets Exhibit 4 - City/County Ordinances 4 Exhibit 5 - Well Logs i 1, - r i } Lake Elmo Wellhead Protection Plan Part 11 ii 12781.000 I! i PUBLIC WATER SUPPLY PROFILE f PUBLIC WATER SUPPLY NAME: City of Lake Elmo PWSID 4: 1820009 ADDRESS: 3800 Laverne Avenue North, Lake Elmo, Minnesota 55042 �i TELEPHONE NUMBER: (651) 777-5510 WEB: www.lakeelmo.org FAX 9: (651) 777-9615 1 WELLHEAD PROTECTION MANAGER `` NAME: Jack Griffin, P.E. 11' ADDRESS: TKDA, 444 Cedar Street, Suite 1500, Saint Paul, Minnesota 55101 TELEPHONE NUMBER: (651) 292-4552 ' E-MAIL: jack.griffin@tkda.com FAX 4: (651) 292-0083 I- 1 # ,1 CONSULTANT/TECHNICAL ASSISTANCE s NAME: Michelle Stockness,P.E. ADDRESS: TKDA, 444 Cedar Street, Suite 1500, Saint Paul, Minnesota 55101 TELEPHONE NUMBER: (651) 292-4400 I E-MAIL: michelle.stocicness@ticda.com FAX#: (651) 292-0083 4 I � 1 Lake Elmo Wellhead Protection Plan Part 11 iii 12781.001 1 DOCUMENTATION LIST STEP DATE PERFORMED Part I Approval Notice Received from MDH April 10, 2007 Scoping Meeting 11 Held: (4720.5349, subp. 1) July 25, 2008 Scoping Decision Notice Received: (4720.5340, subp. 2} August 16, 2008 Remaining Portion of Plan Submitted to Local Units of Government (LGU's): (4720.5350, subp. 1 & 2) May 14, 2008 1 Review Received From Local Units of Government: (4720.5350, subp. 2) Review Considered: (4720.5350, subp. 3) July 14, 2008 Public Hearing Conducted: (4720.5350, subp.4) July 15, 2008 1 Remaining Portion WHP Plan Submitted: (4720.5360, subp. 1) July 18, 2008 ( Approved Review Notice Received: I , S ' I Lake Elmo Wellhead Protection Plan Part 11 iv 12781.001 � 1 WELLHEAD PROTECTION PLAN �. PART II CITY OF LAKE ELMO, MINNESOTA PROJECT NO. 13487.000 I. EXECUTIVE SUMMARY Under the Federal Safe Drinking Water Act, all states are required to have a Wellhead ! Protection (WHIP) Plan. Through this Federal mandate, the Minnesota Commissioner of Health was granted authority by the Minnesota Groundwater Protection Act (Minnesota Statue 1031, Section 3, Subdivision 5) to prepare a rule specifying WHIP measures for public water supply wells. The Minnesota Department of Health administers this WHIP program and the program complies with both Federal and State mandates, Under this program, every public water supply well in Minnesota is required to have a Wellhead Protection Plan. All public wells in Minnesota must implement WHIP measures to protect users from acute health effects relating to disease organisms or chemical contaminants 1� that pose a serious health risk, and from chronic health effects relating to long-term ingestion of chemical contaminants in groundwater. Regulations for this requirement are ( found under Minnesota Rules Parts 4720,5100 to 4720,5590. In Minnesota, the wellhead protection process is broken up into two phases, Part 1 and Part 2. - The City of Lake Elmo currently has three public water supply wells but only uses two. Active wells are Well No. 1 (Unique No. 208448) and Well No. 2 (Unique No. 603085). l� Well No. 3 is not in use (Unique No. 655910). Part 1 of the Wellhead Protection Plan presented the 1) delineation of the Wellhead Protection Area (WHPA) and the Drinking Water Supply Management Area (DWSMA) and 2) the vulnerability assessments for the ` system's wells and the aquifer within the DWSMA. The City of Lake Elmo had Part 1 of the WHIP plan approved by the Minnesota Department of Health on April 10, 2007. The Part 1 report was completed by the Minnesota Department of Health (MDH). r� This portion, Part 2, of the Wellhead Protection (WHIP) Plan for the City of Lake Elmo includes: • The results of the Potential Contaminant Source Inventory • The Potential Contaminant Source Management Strategy • The Emergency/Alternative Water Supply Contingency Plan • The Wellhead Protection Program Evaluation Plan I. Lake Elmo Wellhead Protection Plan Part 11 1 12781.001 Findings in this report are the result of collaboration between the City, TKDA, and the MDH. v A vulnerability assessment for the aquifer within the DWSMA was performed using available information and indicates that the aquifer used by the City is considered to be vulnerable to contamination because it appears that it is possible that surface water is able to infiltrate and recharge the aquifers that the City wells use. The levels of vulnerability in the DWSMA range from Moderate to High. L Since the City wells can receive water from both the surface and subsurface, contaminant sources in both areas need to be assessed. The principal sources of contamination ' would include wells, underground storage tanks, hazardous waste generators, ISTS and surface water sites. This report shall address all existing and possible future contaminant sources within the DWSMA and how these sources can be effectively managed to prevent groundwater contamination. , Section 1 contains the executive summary of the plan. Sections 2-3 of the WHP Plan (hereafter referred to as Plan) contains information and data that support the approaches taken to address potential contamination sources that t have been identified as potentially affecting the aquifer used by the public water supply. The reader is encouraged to concentrate attention on Sections 2-3 in order to better L; understand why a particular management strategy is included in Section 7. f- ti In Section 2, the required data elements indicated by the MDH in the Scoping 2 Notice are addressed as well as the data`s degree of reliability. Pertinent data elements include information about the geology, water quality, and water quantity. Section 3 analyses this data. Section 4 addresses the possible impacts that changes in the physical environment, land use, and water resources have on the public water supply. The City anticipates that its water use will increase greatly within the 10 years this plan is in effect due to population and development increase. The City of Lake Elmo has evaluated the support necessary to implement its wellhead protection plan. it The problems and opportunities concerning land use issues relating to the aquifer, well Lake Elmo Wellhead Protection Plan l ! Part II 2 12781.001 I water, and the DWSMA and those issues identified at public meetings are addressed in l Section 5. The moderate to high vulnerable status of the aquifers and the good quality of water currently produced by the system's wells leaves five major concerns: 1) other wells located within the DWSMA that could become pathways for contamination to enter the aquifer; 2) the pumping effects of high-capacity wells that may have altered the boundaries of the delineated WHPA, reduce the hydraulic head in the aquifer, or cause the movement of contamination toward public water supply well(s); 3) chemical spills or leaking storage tanks that may release contaminants into ground water; 4) shallow disposal type wells; 5) hazardous waste generators or agricultural chemical storage sites. The drinking water protection goals that the Public Water Supplier (PWS) would like to achieve with this plan are listed in Section 6. In essence, the PWS would like to maintain water quality and integrity of the city wells, protect the aquifer, and continue to collect data to support the WHP, and increase public awareness of groundwater protection issues. Thereby confirming where all wells and potential contamination sources are located within the DWSMA, and supporting future efforts in wellhead protection planning. The objectives and action plans for managing the potential sources of contamination are contained in Section 7. Actions aimed toward educating the general public about 1 groundwater issues, gathering information about other wells, and collecting data relevant to wellhead protection planning are the general focus. Section 8 contains a guide to evaluate the implementation of the identified management strategies of Section 7. The wellhead protection program for the City of Lake Elmo will be evaluated on an annual basis. r ! Section 9 references the Water Conservation Plan approved by the Minnesota Department of Natural Resources. An •emergency/contingency plan was developed to address the possibility that the water supply system is interrupted due to either l emergency situations or drought. Lake Elmo Wellhead Protection Plan Part 11 3 12781.001 I ll. DATA ELEMENTS ASSESSMENT 4720.5200 1� L A. REQUIRED DATA ELEMENTS a 1. Physical Environment Data Elements a) Precipitation. Precipitation information was regarded in the development of Lake Elmo's WHP. Data was gathered from the .} Minnesota State Climatology Office. Table 1, in the appendix, shows the precipitation data for the last five years, 2003 to 2007, for the City of Lake Elmo. Using these numbers, the average annual rainfall ( ' i is 29.21 inches per year. i The movement of contaminants through soil to the groundwater is' affected by contaminant properties, soil characteristics, existing vegetation, and climatic factors, including precipitation. Dissolved contaminants in water move through the soil, with the water acting as 'a carrier of the contaminants., Precipitation to an area raises the water content, which increases the mass flow of water through the E soil, which also increases the contaminant flow through the. soil and possibly to the groundwater. The rates of these flows and where S they travel to are dependent on soil, geology types, and properties. b) Geology. This data element is required and is presented in the first r part of the WHP Plan. The geology in the vicinity of the City of Lake 4" Elmo consists of 100-250 feet of unconsolidated glacial deposited sandy outwash and some clay till over bedrock. Bedrock stratigraphy is as follows by depth: St. Peter Sandstone, Prairie du Chien group, Jordan Sandstone, St. Lawrence Formation, Franconia Formation, t Ironton-Galesville Formation, Eau Claire Formation, and Mt. Simon Sandstone, The St. Peter and Prairie du Chien layers are not present in some areas due to erosion. The St. Lawrence formation and the Eau Claire formations are confining layers or aquitards, and 1 have low hydraulic conductivity that prevents the migration of water to deeper layers below them. Water bearing formations are the e_ Lake Elmo Wellhead Protection Plan Part 11 4 12781.001 , Prairie du Chien-Jordan aquifer, the Franconia Ironton-Galesville (FIG) aquifer, and the Mt, Simon aquifer. In areas where the i uppermost confining layer is absent, the upper aquifer is directly connected to the surface. The City uses multiple aquifers for its water supply. Well No. 1 uses the Jordan, FIG, and Mt. Simon aquifers. Well No. 2 uses Prairie du i Chien and Jordan aquifers, The separate aquifers have different vulnerabilities and confining layers. See Part 1 of the report for more details. i� c) Soils. Local soil conditions, infiltration, and erosion characteristics ti. were regarded in the development of this WHP. Since the public water supply aquifers may be vulnerable to land use activities, soil characteristics can help to determine management strategies. The main soil types in the DWSMA are sand and gravels and clay tills. 1 See Figure 4. This is a well drained soil with moderate to rapid permeability. These soil properties enable water to infiltrate and flow through soil and into the groundwater. Water can act as a carrier of dissolved contaminants, and these contaminants can then be l delivered by the infiltrated water flow through the soil into the aquifer. For the City of Lake Elmo, water from the surface carrying •r 1 contaminants may be able to enter the upper aquifer and then the jj lower aquifer, contaminating the water supply. I 1 d) Water Resources. This data element applies as it relates to future groundwater uses that may influence the ability of the aquifer to yield water to the public water supply. The City currently uses two municipal drinking water wells. The continued long-term impact from l water withdrawals throughout the aquifers is not known. Increased water use may result in a reduction in aquifer yield or increase the likelihood that contaminants of human or natural origin may affect the quality of drinking water. The City currently pumps around 60 MGY from its groundwater wells, and is projected to pump around r, Lake Elmo Wellhead Protection Plan Part 11 5 12781.001 F, 160 MGY by 2010 (See Part 1 Report). See Table 3, Well Pumping This is a large projected increase in water use. The City Data. Th j ro g p Y should try to implement conservation measures to try to reduce this future use. Increasing water use to that large of an extent will require additional water supply wells, system infrastructure, and will change the DWSMA boundaries. The annual pumping rate is projected to i increase as population and demand grow; however, the aquifer is i. expected to yield sufficient water to meet the future needs of the i. . City. There are a few small surface water ponds located in the Well No. 2 DWSMA, and part of the surface water body Lake Elmo is located within the DWSMA. The Lake Elmo WHPA is located within the St. Croix River watershed basin. l B. LAND USE DATA ELEMENTS 1. Land Use. Due of the susceptibility of all of the City's wells to contamination, the wells are affected by land use activities within the DWSMA. Due to the r information contained in Part 1 which indicates that the public water supply t._. is moderately to highly vulnerable to certain land use activities, an inventory of other wells, storage tanks, waste sites, hazardous waste generators, septic systems, and shallow disposal wells located within the DWSMA is required. A listing of wells and other potential contaminant sites inventoried within the DWSMA and a map showing their locations are included as Table 1 and Figure 2. Land use maps and zoning maps for the area located within the DWSMA are located within the Appendix. The DWSMA consists of approximately . 1,400 acres. Approximately 1,300 acres (93%) are located within the City of Lake Elmo (Washington County), and 100 acres (7%) are located in the City of Oak Park Heights (Washington County). See Figure 3. The area is C' mostly comprised of agricultural, commercial, and residential land. See Figure 5. The City has control of land uses through their zoning ordinances. r , Lake Elmo Wellhead Protection Plan Part II 6 12781.001 ! l t.= Because of the aforementioned vulnerable classification of the DWSMA, i contamination can come from both surface and subsurface sources. Soil and aquifer characteristics elaborated earlier in this report have shown that . surface contaminants are able to infiltrate and migrate through the soils to ( the groundwater. That is why it is important to monitor land uses in the DWSMA and possible sources of contamination to the wells. Possible contaminant sources were identified and evaluated within the DWSMA. It is important to realize that the WHPA does cover two municipalities, so cooperation between different municipalities is essential. The following potential contaminant sources were found to be within the DWSMA: a) Public and Private Wells. Figure 2 shows a map of all public and private wells that were located. Fifty (50) private wells and five (5) public water supply wells are located within the DWSMA. One (1) observation well was also found. There are, no known "lost" municipal wells at this time within the City. b) ISTS. Shallow groundwater is highly susceptible topollution from r septic tanks. Ninety one (91) ISTS systems were found within the DWSMA. c) Registered Storage Tanks. Registered storage tanks are regulated by the Minnesota Pollution Control Agency (MPCA). All storage ,i tanks are regulated with the exception of tanks used for agriculture, septic tanks, or tanks with a capacity of 110 or less. These tanks may be above or below ground. One (1) active registered storage tank was found. d) Leaking Underground Storage Tanks, Two (2) leaking underground storage tanks were found within the DWSMA, of unknown status. e) Hazardous Waste Generators. Within the DWSMA, eight (8) sites { Lake Elmo Wellhead Protection Plan Part II 7 12781,001 1 SF rt1 were found that generate hazardous waste materials. See Figure 2 f} Shallow Disposal Wells. To date, there are two (2) known shallow disposal wells within the DWSMA. Each city well site, Well No. 1 and j 2, has a gravel pocket that receives clear water drainage, which is classified as a shallow disposal well and a potential Class V well. These locations are noted on the IWMZ datasheets found in the r. appendix as Exhibit 3. There are no known large community septic systems known at this time, which would also classify as a Class V well. g) Pesticide Use. Since part of the DWSMA is comprised of agricultural land, there may be pesticides used on the surface agriculture. Proper pesticide usage and stormwater regulations can help to mitigate the effects of pesticide contamination of the groundwater. h) Other. Within the DWSMA there was also one observation well, one NPDES site, one pipeline facility, and one air release point which are each a potential source of groundwater contamination. 2. Public Utility Services. Utility service in the DWSMA consists of some City r water, some City stormwater, and a gas pipeline. Most utilities should not pose a significant risk to groundwater pollution. To mitigate stormwater infiltration problems, stormwater controls should be implemented to reduce its possible impact on the groundwater. There are a few high volume transportation routes within the DWSMA that pose a threat due to spills or " 7 accidents. Highway 5 and a railroad line run through the Well No. 1 DWSMA, and Highway 36 runs along the north boundary of the Well No. 2 f' DWSMA. F, C. WATER QUANTITY DATA ELEMENTS I 1. Surface Water Quantity. It has been shown that surface water may infiltrate L- and recharge the aquifers used by the City wells. There are a few small surface water ponds located in the Well No. 2 DWSMA, and a portion of 1. s Lake Elmo Wellhead Protection Plan Part 11 8 12781.001 Lake Elmo surface water body located in the Well No. 2 DWSMA. See Figure 8. 2. Groundwater Quantity Groundwater levels are adequate for the amounts that the City of Lake Elmo is currently permitted for under the groundwater appropriations program that is administered by the Minnesota Department of Natural Resources (MDNR). There are currently no other high capacity wells within the DWSMA for which well interference complaints with the City wells have been documented. At this time, there appears to be sufficient groundwater quantity based upon existing pumping capacity of all wells completed in the aquifer used by the City, and the City does not exceed its permitted withdrawal volumes. If new high capacity wells or new appropriation permits are implemented, the potential impacts to the j DWSMA should be reviewed. With the large volume of projected water use in 2010, the City should implement conservation measures to try to reduce this future water use as much as possible. 7 D. WATER QUALITY DATA ELEMENTS 1, Surface Water Quality, There are a few small surface water ponds located t in the Well No. 2 DWSMA, and a small portion of Lake Elmo surface water body located in the Well No. 2 DWSMA. Water quality of these surface bodies is unknown, Surface water may be able to infiltrate and recharge the groundwater, so any future surface water bodies should be monitored for water quality. This water bodies do not directly receive stormwater but probably receive runoff during rainfall events. 2. Groundwater Quality. Well water is tested annually to determine if it meets water quality parameters, Existing information consisting of isotopic and i chemical analyses indicates that the aquifers used by the public water i supply may be recharged by surface water. Tritium tests are unavailable for the wells and have not been performed to date. As such, there is a moderate to high probability that current land use has a direct impact on the quality of drinking water. Additional information should be collected over the ten-year life of the plan to continue to monitor groundwater quality. The City f Lake Elmo Wellhead Protection Plan Part 11 9 12781,001 is currently supplying its citizens with good groundwater that meets all drinking water quality standards. See the Consumer Confidence Report in t= the Appendix. (' 1. 1 III. ASSESSMENT OF DATA ELEMENTS A. USE OF THE WELL General information describing this public water supply system is presented in Part 1 of this Plan. The City currently uses two drinking water supply wells. They currently pump around 60 MGY. Well No. 1 is expected to pump 100 MGY by 2010 f and Well No. 2 is projected to use approximately 54 MGY by 2010 as outlined in ` the Part 1 report. The Inner Wellhead Management Zone (IWMZ) of each City well r` was checked during the completion of this report, and the wells were found to L conform to regulations. IWMZ forms are found in the Appendix as Exhibit 3. B• WELLHEAD PROTECTION AREA DELINEATION CRITERIA See Part.1 of this Plan for documentation regarding how the following delineation criterion was applied to determining the boundaries of the WHPA: r 1. Time of Travel —ten years 2. Flow Boundaries — geologic information 3. Daily Volume—provided by the City i 4. Ground Water Flow Field —delineation method 5. Aquifer Transmissivity— aquifer test plan The following items were recommended in the Part 1 report: 1) Investigation of the surface water quality in the High Vulnerability areas, since there may be a link , between surface water and groundwater in these areas, 2) Collect tritium samples 1' from Well No. 1 and 2 to determine contribution of the shallow versus the deep water aquifer, and 3) Revisit the modeled hydraulic conditions near Well 1 and include any new aquifer test data available, and evaluate any well logs of deep wells constructed since this plan. }}r ,i C. QUALITY AND QUANTITY OF WATER SUPPLYING THE PUBLIC WATER i I : Lake Elmo Wellhead Protection Plan Part II 10 12781.001 1, SUPPLY WELL Water quality monitoring results for the two wells used by Lake Elmo indicate no evidence of contamination from 1) human-origin such as fuel and fuel break-down products, pesticides, or commercial fertilizer, or 2) naturally occurring contaminants such as arsenic and boron. However, water quality monitoring results in other areas of the City do indicate evidence of contamination from human-origin such as fuel and industrial products. Contamination in these areas are being addressed and monitored. The interaction between this known contamination and the City's aquifers should continued to be watched. At this time, problems with water quality are not an issue as the system has enjoyed water quality that meets or exceeds + standards in the Federal Safe Drinking Water Act. f D. THE LAND AND GROUNDWATER USES IN THE DRINKING WATER SUPPLY MANAGEMENT AREA Proactive management of land uses including existing wells, shallow disposal wells, l hazardous waste sites, septic systems, and storage tanks are of immediate r concern due to the vulnerable rating of the aquifer. The management strategies selected and documented in Chapter 5 of this Plan will focus in on activities that have the most potential to impact the aquifer this public water supply system is r �- using for its drinking water supply. Implementation of management strategies however might be difficult since the DWSMA is located in two different { municipalities: the City of Lake Elmo and Oak Park Heights. Land use in Oak Park I Heights may change and is out of the range of influence of the City of Lake Elmo. Through cooperation with Oak Park Heights and its residents, it is the intent that Lake Elmo land use controls and other additional steps will be taken to protect the drinking water quality of the aquifers within the DWSMA. 1 �I Lake Elmo Wellhead Protection Plan Part 11 11 12781.001 � t IV. IMPACT OF CHANGES ON PUBLIC WATER SUPPLY WELL }} 1 t A. CHANGES IDENTIFIED IN _ 1. Physical Environment. Large-scale changes inthe physical environment within the DWSMA are not anticipated during the 10-year period that this j Plan is in effect. Current anticipated changes include the conversion of agricultural land in the Well No. 2 DWSMA to residential development. However, large scale environmental changes within the DWSMA could affect the aquifer greatly and should be immediately addressed if they arise. 4- 2. Land Use. Because of the vulnerable classification of the DWSMA, contamination can come from both surface and subsurface sources. That is why it is important to monitor land uses in the DWSMA and possible sources of contamination to the wells. Land uses that could possible f contaminate the aquifer such as underground storage tanks or hazardous waste generators within the DWSMA should be addressed during city r, permitting review. f Land uses that result in additional use of the aquifer in the DWSMA will likely have little impact on the aquifer unless water demand is increased to the point that additional loss in hydraulic head occurs within the aquifer used by the public water supply. Land uses which use the aquifer greatly should trigger monitoring of existing contamination plumes in the region in case increased pumping rates draw the contaminants towards the Public Water Supply (PWS) wells. 3. Surface Water. There are a few small surface water bodies in the DWSMA. There appears to be a direct hydraulic connection between surface water and the aquifer used by the public water supply system as a drinking source, as previously noted, Any surface waters would have a high probability of effecting the quality or quantity of the public water supply, especially in the high vulnerability areas. Water quality of the existing and Lake Elmo Wellhead Protection Plan Part 11 12 12781,001 f I any new surface water bodies should be monitored to mitigate possible I contamination to the aquifer via surface water infiltration. 4. Groundwater. The public water supply system's wells have historically provided groundwater of excellent quality and quantity. As of the date of Plan approval, the community does anticipate the addition of a municipal well in the future, which will alter the boundaries of the DWSMA. The City does not anticipate; 1) addition of other large capacity water users to the public water system; and .2) no large expansions are being planned by businesses currently served. Greatly increased water demand from the aquifers could result in the loss of hydraulic head within the aquifer and may 1 alter the boundaries of the WHPA, B. IMPACT OF CHANGES 1. Expected Changes in Water Use. The City anticipates that its water use will I increase greatly within the 1.0 years this plan is in effect. The City will re- evaluate its water-use patterns for the second five-year interval as part of its comprehensive planning activities and incorporate these results into future revision of this Plan. 2. Influence of Existing_ Water and Land Government Programs and Regulation. Government programs oversee many programs that help to control groundwater pollution. The Minnesota Department of Health has the authority in permitting wells, and Washington County has a delegation '{ agreement with the MDH for the remainder of the regulatory responsibilities ! with wells. The Minnesota Department of Natural Resources appropriates water uses. Both the City of Lake Elmo and Washington County have land use ordinances that could be revised in the future to address possible contamination sites within the DWSMA. Local land use, zoning changes and stormwater management may be the most effective way to guard against potential contamination sources in the future. However, there is no discussion, or intention at this time of requiring additional regulation related to managing wells other potential contamination sources within the City's DWSMA. I Lake Elmo Wellhead Protection Plan Part 11 13 12781.001 Washington County currently has a cost sharing program to address the sealing of unused/unsealed wells, and may assist with these wells as they are identified. The City also has an ordinance prohibiting the connection of new wells to a plumbing system so that it interconnects with the public water t: supply distribution system. A copy of this portion of the City Ordinance is included in the Appendix as Exhibit 4. (; 3. Administrative, Technical, and Financial Considerations. The City of Lake Elmo assembled a Wellhead Protection Team early in the process of developing this Plan. Many of the activities during the planning process have been accomplished through efforts of this group, with assistance from studies provided by other units of government. For this Plan to be effective: } a) The City will need to raise public awareness of the issues affecting its drinking water supply through public educational programs. b) Administrative duties will remain with the Wellhead Protection r Manager who will report to the City Council r c) Implementation of Wellhead Protection activities will be provided by funds from the City's budget. Other sources of, possible funding or t assistance may include; 1) Existing State or County cost share funds for abandoned well sealing; 2) the Minnesota Department of Health; r- and 3) the Minnesota Rural Water Association for technical assistance. The MPCA and the MDH are also sources of information regarding groundwater protection. d) The costs of implementing Wellhead Protection activities will be evaluated on an annual basis. The City will discuss changes in plan implementation costs with the MDH to determine the availability of State or Federal funding.if needed. Lake Elmo Wellhead Protection Plan Part 11 14 12781.001 1 V. ISSUES, PROBLEMS, AND OPPORTUNITIES _ A. LAND USE ISSUES, PROBLEMS, AND OPPORTUNITIES RELATED TO: 1. The Aquifers. Since the aquifers are moderately to highly vulnerable to contamination, the system can be greatly affected by land use activities. Land use and Zoning regulations should discourage the types of activities 1 that may cause contamination of the aquifers. If additional high capacity wells are added to the area, the DWSMA may have to be delineated again. Since little hydrogeologic information is currently available, additional research and studies would increase knowledge and help to protect the aquifers. 2. The Well Water. A potential contaminant source inventory performed for this report. The wellhead protection plan is primarily concerned with other water supply wells, storage tanks, hazardous waste generators, septic systems, and shallow disposal wells located within the DWSMA. The aquifers that provide the City wells with water are vulnerable to these } potential contaminant sources, The wells should be continually monitored for signs of pollution or contamination. The placement of additional high capacity wells, increased pumping from existing wells, or significant changes in current groundwater appropriations within the DWSMA may have an impact on; 1) groundwater availability to all r users; 2) increased risk that contamination may enter the part of the aquifer used by the community water supply wells; or 3) change the delineated WHP area and the DVVSMA boundaries. The DNR and the MDH will work with the City of take Elmo to become aware of any proposed high-capacity wells within the DWSMA. The MDH and DNR will work with the well owners to minimize or eliminate potential impacts to the City water supply. l Lake Elmo Wellhead Protection Plan i Part II 15 12781.001 I' 3. Storage Tanks. The MPCA Storage Tank Program provides information and assistance to tank owners and others regarding technical standards required of all regulated above ground storage tank systems and underground storage tanks systems. The program evaluates compliance of t tank facilities with State statutes and rules through inspections and c " investigations and determines appropriate enforcement actions when violations are discovered. i. Tank systems of more than 110 gallons are regulated unless they are for residential use, farm tanks, or contain heating oil. All tank systems including farm, residential, and heating oil tanks with a capacity of more than 1,100 gallons are regulated, In the City DWSMA we.found one active registered storage tank and two leaking underground storage tanks of unknown status. This MPCA program should be sufficient to monitor and regulate these r potential sources of contamination. 4. Hazardous Waste Generators. Eight (8) hazardous waste generators were V found. The MPCA regulates and provides assistance to commercial i hazardous waste generators in greater Minnesota. Management requirements depend upon the type and amount of waste they produce. These requirements are part of the federal Resource Conservation and Recovery Act (RCRA) and Minnesota Hazardous Waste Rules. They are designed to protect people and the environment from the effects of improper management of hazardous wastes from commercial sources. 5. Shallow Disposal Wells, Two (2) possible shallow disposal wells were found within the Lake Elmo DWSMA. These were gravel pockets that receive clear water discharge at the city well sites. All Class V wells need to be inventoried with Environmental Pollution Agency (EPA). Two kinds of Class V wells are banned nationwide; those at vehicle maintenance shops and : community cesspools. New ones are prohibited, and those in wellhead protection areas should have been closed by 2007. There are no known y; Lake Elmo Wellhead Protection Plan Part 11 16 12781,001 1 large community septic systems known at this time, which would also classify as a Class V well. 6. The Drinking Water Supply Management Area. A primary concern expressed by the City is to ensure that consistent and long-term management of water wells and the potential contaminant sources within I the DWSMA. The City has limited legal capabilities to regulate activities in the area of the DWSMA that are beyond its City limits. Lake Elmo needs to work with Oak Park Heights to monitor the quality of the groundwater and ( land use activities within the DWSMA. Also, the City has no regulatory 4 authority over water appropriations and must rely on the State of Minnesota to address issues and concerns related to pumping. Changes in land use that increase pumping of the aquifer used by the City wells can be assessed by the City for its possible impacts on water availability and quality. B. IDENTIFICATION OF: 1. Problems and Opportunities. Disclosed at Public Meetings and in Written Comment. At the beginning of the planning process other Local Units of Government (LUGs) were identified and informed that the City was beginning the wellhead protection planning process. (See Exhibit 1 in the Appendix for a list of LUGs.) Each unit of government was also sent a copy of the City's delineated WHPA and DWSMA and vulnerability assessment i for the wells and DWSMA. No comments from the LUGs were received. i The general public was also given opportunities to participate in the planning process and to comment at the Public Informational Meeting and Public Hearing. One person voiced a concern at the public hearing, but it was regarding existing contamination outside the DWSMA boundaries, which is outside the scope of this plan. 2. Data Elements, The state's Wellhead Protection Rule requires that existing information be utilized in developing the initial Wellhead Protection Plan. There is a limited amount of subsurface information available to define local groundwater flow conditions and the groundwater chemistry of the aquifer } within the DWSMA. As a result, delineation of the WHPA represents a t i Lake Elmo Wellhead Protection Plan }I Part II 17 12781.001 1 composite of capture zones generated by varying aquifer properties. The City plans to utilize public education opportunities, both existing and proposed to address potential contamination of the aquifer. Additionally, 1 the City will work in cooperation with Washington County to utilize any state well sealing cost share programs currently available. The City currently has f an ordinance in place that prohibits the cross connection between privately owned wells and the community water supply distribution system. The City will set a priority on well sealing for existing wells that are unused or not properly maintained. i The City plans to implement this WHP Plan to address potential n , contamination of the aquifer. The goals and action plans of this report are elaborated in the following chapters. This Plan is scheduled to be updated after ten years or with the construction of a new City well or other variables that may change the system's delineation and properties. i Further, the City will work with MDH to 1) identify proposed wells that may present ground water conflict concerns; 2) ensure these wells are properly constructed; 3) determine whether an alternative aquifer could be used; and 4) identify water-use and conservation requirements that the Minnesota r DNR may specify with the groundwater appropriations permit. Regarding storage tanks, the City will continue to work with MPCA and MDH to 1) track current and likely future locations of tanks; 2) enforce local land use performance standards for land uses that utilize tanks; 3) promote best management practices for all tanks and; 4) provide educational material to tank owners/operators. yy( l : Shallow disposal wells are regulated by the federal EPA. The City will cooperate with the MDH in developing an inventory of where these types of wells may be located within the DWSMA and provide the well owners with educational materials regarding the use or management of these types of wells. ISTS systems are permitted through the City. The City will continue to k- Lake Elmo Wellhead Protection Plan Part 11 18 12781.001 inventory any new ISTS in the DWSMAs, review their impact on the plan, i and help owners to ensure their systems are in compliance with standards. The City plans to continue to focus its data collection efforts on the following activities throughout the ten-year life of this Plan: a The Citywill work to continuous) identify new potential sources of Y fY p . Icontamination that are constructed or installed within the DWSMA and to verify their locations in the database. b) The City will inform MDH when any of the City wells are repaired so that information regarding well construction, static water level, and pumping capacity can be verified or updated. c) The City will inform the MDH of any wells that are to be properly sealed within the DWSMA so that the Minnesota Geological Survey can be notified and determine whether it can run a borehole geophysical survey of the well. r d) The City will inform the MDH if the City is considering the construction of a new water supply well so that the MDH can I determine whether any potential sites for the new well present I concerns over well interference or the movement of existing contamination plumes toward existing City or private water supply wells. 3. Status and _Adequacy of Official Controls, Plans, and Other Local, State, and Federal Programs on Water Use and Land Use. There are other tools javailable to the City and other regulating agencies that may be used to achieve the wellhead protection planning goals identified by the wellhead planning team. State and local governmental units such as MDH, Washington County, the DNR, and the City of Lake Elmo oversee the { following areas and may be able to aid in the implementation of this plan: ■ Well construction - MDH, Washington County Lake Elmo Wellhead Protection Plan Part 11 19 12781.001 r c 1 ' ■ Well sealing - MDH, Washington County ■ State groundwater appropriation permits - DNR ■ Public water supply quality - MDH ■ Setbacks for specific contaminant sources from a well - MDH and local governments through conditional use permitting ! ■ Local land use and zoning controls - Local Governments ' ■ Tank control program - MPCA r ■ Shallow disposal wells - USEPA ■ ISTS - City, Washington County ■ Agricultural tanks and BMP - Department of Agriculture The wellhead protection planning team recommends that no additional regulations be imposed at this time and are confident that local issues may be adequately addressed through existing processes. These include public education, adoption of best management practices for different types of wells, tank maintenance, water conservation, and good communication with { other landowners within the DWSMA. r- f- i 1. Lake Elmo Wellhead Protection Plan Part 11 20 12781.001 i Vt. WELLHEAD PROTECTION GOALS (4720.5240) The Lake Elmo public water supply is considered to be vulnerable to contamination. j Based on geologic conditions, these contaminants could come from both surface and 1 subsurface sources. Consequently, the principle potential sources of contamination to the f aquifer are other wells that reach or penetrate it, shallow disposal type wells, surface I waters, failing septic systems, and above ground or underground storage tanks. This WHP Plan will focus on preventing contamination of the aquifer and managing the .aquifer cooperatively to assure sustainable water supplies for all users through education and management strategies. The City P poses,ro through the implementation of this WHP Plan, to strive to supply safe, g potable water for its customers into the future. The WHP team identified the following goals to be achieved with the action items contained in this Plan: A. Maintain water quality and integrity of the public water supply system's wells. B. Ensure protection of the City's aquifers. C, Provide ongoing collection of data to support future wellhead protection efforts. D. Increase general public awareness of the wellhead protection program, and issues. Lake Elmo Wellhead Protection Plan Part II 21 12781.001 vll. OBJECTNES AND PLANS OF ACTION (4720.5260) -- ESTABLISHING PRIORITIES The aquifer supplying the system's drinking water supply has been identified as being vulnerable to contamination. Based on geologic conditions, these contaminants could come from both surface and subsurface sources. A number of factors must be considered when WHIP measures are selected and prioritized (part 4720.5250, subpart 3). Such 4 ' factors include: contamination of a public water supply well, quantities of the potential contamination sources, location of the source in relation to the well, capability of the i. geologic material to absorb a contaminant, existence and effectiveness of existing official - controls, time required to obtain cooperation, and administrative, legal, technical, and financial resources needed. L Therefore, the Wellhead Protection Planning Team would like to concentrate management efforts on the following factors to create awareness of groundwater protection and help reduce the potential for future contamination of the aquifer: A. Public education B. Wells 4` C. Storage tanks r D. Shallow disposal wells f' E. Data collection F. Inner Wellhead Management Zone (IWMZ) G. Stormwater H. ISTS i I. Old Municipal Wells J, Agricultural Strategies Lake Elmo Wellhead Protection Plan Part 11 22 12781.001 i A. PUBLIC EDUCATION i OBJECTIVE Al: Increase public awareness of the Wellhead Protection Program and groundwater protection issues. Educating the general public about how certain land use activities can impact local water quality. Create newsletter articles specifically for landowners in the WHP Measure Al-1: ; WHP area informing them about wellhead protection and 1 best management practices. Publish articles about WHP in _ the city newsletter annualy____. ._._.__.._......_.._.--------.-------- Source of Action: ' City of Lake Elmo..................... .._.__..__._____._.._.__.______...____...____..____._....---.-.-.-.--.._...__.._.._.. Coo erator s : MDH, MRWA for material Time Frame: _IJBy 2009 Estimated Cost: Staff time The general public and property owners within the l Goal achieved: DWSMA become better informed about wellhead I _protection and groundwater principles: Send an annual reminder notice to property owners on the WHP Measure A1-2: PCSI list reminding them of proper wellhead protection ....best management techniques. l Source of Action: ; City of Lake Elmo _—..-.--_-----------..---.---------------_._._._._...-___.--_ __.-._._._------. Cooperator s : MDH, MRWA for material Time Frame: By 2009 _ Estimated Cost: Staff time The general public and property owners within the Goal achieved: DWSMA become better informed about wellhead protection and groundwater principles^_..._..._.._____._____._.._._._..._.._......._._._.... WHP Measure Al-3: Put wellhead protection general information and links on fthe city website. --- _._.__.__.____._._...__.__..__.._.._.......__....______...._._._.___.___.._---.---._._...._._.__..._._.._.....__ Source of Action: ..City of.Lake..Elmo........------- --------------- ..............___._.._..__..._.._......_.__._.-........_.._...._.-...__......._... Coo erator s : i MDH, MRWA for material Time Frame: By 2009 _ Estimated Cost: Staff time __.__...........................__-...._...-.-.---___._..._____._-___._._____._-_...._._____._-.._--.___-------.____....._...._._._.._.._..__ _.____._._...._._._._. The general public and property owners within the Goal achieved: DWSMA become better informed about wellhead protection and qroundwater principles. k 1 1 Lake Elmo Wellhead Protection Plan Part 11 23 12781.001 Obtain a video from the Mp- about Well H or WHP Measure Al-4: a MRWA Protection and show on the cable access network. Source of Action: I City of Lake Elmo Coo erator s : _MDH, MR_ WA for material Time Frame: Estimated Cost: Staff time The general public and property owners within the Goal achieved: DWSMA become better informed about wellhead protection and groundwater principles. l . L r r Lake Elmo Wellhead Protection Plan Part II 24 12781.001 .j 1 B. WELLS { OBJECTIVE B1: Educating the general public about proper well management techniques and how their wells can affect the drinking water supply. Send an annual reminder notice to well owners on the WHIP Measure 131-1: PCSI list reminding them of proper wellhead protection { best management technic�ues.__.-.-_--..._.-.-.--_.--____..-__._.____.____._..._____.__-..- ( Source of Action: City of Lake Elmo _ ----_..__-_-`' Coo erator s : MDH, MRWA for material Time Frame: By 2009 Estimated Cost: Staff time Goal achieved: Well owners within the DWSMA become better informed about well maintenance and wellhead protection_ _ Act fas an information source to identify potentialfinancial { WHP Measure 131.2: assistance such as grants, loans and cost-sharing programs for well work. Source of Action: City_ of Lake Elmo -, �--- -_-____---------------_-----— - WT -_ Coo erator s MDH, MRWA,Washington Time Frame: By 2-009 Estimated Cost: Staff_time _ Well owners 'within the DWSMA become better informed Goal achieved: on available financial assistance programs for well maintenance and work. _-------.-- -___...__._..- ._._.------------------ _� OBJECTIVE 132: Reduce possible contamination pathways via wells to the aquifer and city water system. I ' WHIP Measure 132-1: Assist well owners in obtaining funding for sealing unused ' wells. Source of Action: { City of Lake Elmo ---------------------------_ -.--------------------------- Coo erator s : _Washing_County,cost sharing program _ _ Time Frame: ; Starting immediately Estimated Cost: Staff time Goal achieved: 1_ Reduce_aquifer contamination pathways via existing wells, l Lake Elmo Wellhead Protection Plan Part 11 25 12781.001 1 Require that all property owners within the area under ' I WHP Measure B2-2: ' Jurisdiction connect to the public water supply and I disconnect their well from the home plumbing system to prevent cross-contamination. I Source of Action: City of Lake Elmo I Coo erator s : ` None Time Frame: Current ordinance I Estimated Cost: i.Staff time Goal achieved: Prevent cross-contamination of the water system. _._._._ I _---__....___._--------_— ._..__ ..__._.___. i OBJECTIVE 1133: Identify wells are not in compliance with Minnesota State Well Code and MDH requirements. r .......... Measure _ - WHP Measure B3-1: ' Contact the MDH when wells are found that are a safety_ and health hazard Source of Action: City of Lake Elmo __ Coo erator s : Time Frame: I Current Practice,^ongoin�L� Estimated- Cost: ' Staff time Help to prevent contamination of the water supply by bad Goal achieved: wells. _ -----______._-.__.._._ r , OBJECTIVE 134.: Maintain up to date records of well locations and status r- within the DWSMA. i. _----------------------------.._.._-___-.._. Request that the MDH informs you when permits are granted for new high capacity wells, maintenance of i WHP Measure 64-1: unused existing wells, when existing wells are disclosed as a result of property transfer, or abandoned wells are sealed in the wellhead protection area Source of Action: Coo erator s : Cit o_f Lake Elmo Time Frame: _2008, Ongoingr Estimated Cost: � Staff time to log data as received.__ __-.___...•_.____......._._.....___.___.___......__._____.. Goal achieved: _['Hey maintain well database, —_ _...__.__......_.._..__-.__..,_.. ........_._..__._._._.. r� f' L L Lake Elmo Wellhead Protection Plan Part 11 26 12781.001 S C. STORAGE TANKS OBJECTIVE Cl: Educating the general public about proper tank management techniques and how failing tanks can affect the drinking water supply. Send an annual reminder notice to tank owners on the WHP Measure C1-1: PCSI list reminding them of proper wellhead protection best management techniques. _.------.----._.___._..._.___..___._..._.._.._.......__.....,_.._..__._.....,_...,.._.- Source of Action: i City of Lake Elmo___...-..-__.__._.._...___._.-.___..._.__.__._....--.-------....___........._..__.....---....._...__..._...__. Coo erator s : MDH, MRWA, MPCA for material Time Frame: L__By.2009 Estimated Cost: i Staff time Goal achieved: Tank owners within the DWSMA become better informed about proper tank maintenance and wellhead protection. l OBJECTIVE C2: Maintain up to date records of tank locations and status within the DWSMA. Ensure new tank installation comply with wellhead protection principals. __.............._.-.._...-----_---_-___._.-.._..._-----------.._.._...-....... -...._........._....---._...._...................................__......_._.__...._......_...._.:_._..... City staff will identify and review proposed new regulated jtank locations during the permit review process. WHIP Measure C2-1: I I Encourage tank locations that do not increase possible contamination sites within the DWSMA ' _ ....._._...._.........-_-....._._._._._._.....__......._.__.............._.._...._.._..._.._..._._..........__....._..._...._.__._.__.__. Source of Action: ; City of Lake Elmo, Planning Department I Cooperators Time Frame: �� By 2009 Estimated Cost: ! Staff time �_�..._......._.. -...._......_..---....._..........__..........._...---..__._....--..........................._.__._................................................... ........._..__......_.......__....... Goal achieved: Staff will be aware and be able to record new tank _? locations and how they.may affect the.D WSMA. . 1 I : 4 I Lake Elmo Wellhead Protection Plan Part 11 27 12781,001 D. SHALLOW DISPOSAL WELLS OBJECTIVE D1: Identify any shallow disposal wells within or near the DWSMA. ------------------------------- ContinuehetDWSMA monitor for loca---._.._.___________....__-___._.._._._._____._._...___.__.. tions of shallow disposal wells . . l._C.... t Lake Elmo- ---- Source of Action: WHP Measure Coo erator s : _ Time Frame: Immediatel -.______ � _ ! l Estimated Cost: i Staff time .................__.-_----._....___ __._...,._._......_. Keep current records of all possible contamination sites Goal achieved: I_ within the DWSMA. ----....__.._.......-.---...---------- --._-.._._-..____,...-.__...._.._-__.__.._.._.__---_._...-_-----..... __.__,._.-,.._._._.._._...__. Act as an information resource about EPA regulations to WHP Measure D1-2: any property owners where a shallow disposal well is discovered. Source of Action: City_°f___..__.�--..--_.._.....____...._...._.__.____._._..__._.____.---..___.____.__._..__.____.__..._..__..,._.____..._............... , Lake Elmo j Cooperator(s): EPA _..........._...................... __.._.._..__._......._.._.._,_..---...__._.._....._._.._..... _ c Time Frame: 2009 Estimated Cost: Staff time Property owners within the DWSMA become more . !- Goal achieved: Informed about EPA regulations regarding shallow disposal in WHP areas. l,. __..__..._._....-_ r . L Lake Elmo Wellhead Protection Plan Part 11 28 12781.001 1 i E. DATA COLLECTION OBJECTIVE E1: Continue to collect data on the DWSMA and potential sources of contamination within it. WHP Measure E1-1: Create and maintain a database of PCSI sites within the DWSMA, and update as new information is found_ Source of Action: City of Lake Elmo I Coo erator s : MDH,-MPCA -_W_____^- ____:.-___-___.____.___._._._--.---_ ' Time Frame: 2009 -��_------- --_�� - - Estimated Cost: Staff Time j Lake Elmo will have an up to date list of PCSI sources in E Goal achieved: j the DWSMA and will be able to contact property owners as needed_ ----------- WHIP Measure E1-2: Monitor planning and zoning activities within the DWSMA that may affect the area during the permit review pracessi Source of Action: City of Lake Elmo, Planning Department Coo erator s : ____ .----.-------------_ __--____ Time Frame: I Immediately Estimated Cost: Staff time Goal achieved: Lake Elmo will stay aware of land use activities which may have a negative effect on the DWSMA. l ; Sample City Public .Supply wells on a minimum annual j WHP Measure Ill basis and watch water quality results for contaminants. _ Especially for migration of known_ contamination. Source of Action: City of Lake Elmo _ _______.__ --__.�-_ -_�___ ________._______________ Coo erator s : MDH - - _.. Time Frame: Current Practice Estimated Cost: Staff time _ _ _ _ Goal achieved: Lake Elmo will stay aware of the waterquality of T -the public water supply aquifer DWSMA. 1 Lake Elmo Wellhead Protection Plan Part 11 29 12781.001 F, INNER WELLHEAD MANAGEMENT ZONE (IWMZ) w , OBJECTIVE F1: Manage the 200-ft inner well management zone to prevent contaminants from entering the area adjacent to the wells. ` WHP Measure F1-1: Review and update the IWMZ survey for all city wells _ --_ Source of Action: LCity of Lake Coo erator s : MRWA Time Frame: Immediate, every.5 years ...........----- Estimated Cost: Staff time Goal achieved; Staff will remain informed and current on activities within the IWMZ. Staff will have current map on file 1 .................._.__._..__.._.._---------.-._-_ _.._.__.._.._._. WHIR Measure F1-2: Annually perform a visual monitor of well setbacks for all new potential sources of contamination._ Source of Action: Y j Cit of Lake Elmo _ Coo ell rator� MRWA_-__-_---__---_.___._...__._-____-_______________.__..�______W___�__ Time Frame: ;_Next year Estimated Cost: Staff time Goal achieved: Staff will remain informed and current on activities within the IWMZ. 1� t- r �A 1.. f Lake Elmo Wellhead Protection Plan Part 11 30 12781.001 I _ G. STORMWATER OBJECTIVE GI: Integrate stormwater management into the city planning and development review process such that the potential impact of stormwater systems upon the drinking water aquifer is minimized. WHP Measure G1-1: Add a wellhead protection review to any stormwater i related system during the permit review process. ` Source of Action: City of Lake Elmo, Planning Staff Coo erator s : MPCA, MDH Time Frame: By 2QO9 Estimated Cost: ' Staff time Goal achieved: The City helps to protect the aquifer through sound management of stormwater. -- ---------------------- ------------------........._..._....._._._......................._- _-__....................................-_.._..._......_.......... . Encourage best management practices for residential lawn WHP Measure G1-2: care and agricultural land management using the city website toprovide information. Source of Action: City of Lake Elmo Coo erato r s : _MPCA,-MDH .-.___-..____-____------------------------_._- I Time Frame: Estimated Cost: -Staff time Goal achieved: Reduce groundwater quality problems caused by stormwater runoff. I l ' Lake Elmo Wellhead Protection Plan Part 11 31 12781.001 H. ISTS OBJECTIVE H1: Educating the general public about proper ISTS management techniques and how failing systems can affect the drinking water supply. Send an annual reminder notice to ISTS owners on the WHIR Measure H1-1: PCSI list reminding them of proper wellhead protection L. best management techniques_. i Source of Action: City of Lake Elmo l ------------ i Cooperator(s): MDH, MRWA, MPCA for material _ I Time Frame: I By 2009 Estimated Cost: Staff time S p p rs�within -the DWSMµ._-.__.. _ .__._.._ ... ....__ __ .__..___ Goal achieved: IST A b_-e--_c__ame___better_.._--_ ___inf-__or' -.- about ro _er maintenance and wellhead protection. I' OBJECTIVE H2: Maintain up to date records of ISTS locations within the DWSMA. L WHIP Measure H2-1: City staff will review proposed ISTS locations during the ' city permit review process and update PCSI_file:�_...._ Source of Action: City of Lake Elmo, Planning Department Cooper s ; Time Frame: By 2009 {` I Estimated Cost: ' Staff time Goal achieved: Staff will be aware and be able to record new ISTS r locations and how they_may_affect the DWSMA, �_ y r OBJECTIVE H3: Ensure that ISTS installations comply with regulations. City staff will monitor ISTS installations and issue notices WHP Measure H3-1: to property owners if systems are found which are a public althroblem. CitSource of Acton: -.-_.�-_._.________..__......._�._.._._.___._.____..__..__._..._......__..__.._.._._._,....___.._...._..___. �- e Y..of_Lake Elmo ___�_____ !: Coo erator - _--__-.._.-__ s Time Frame: 1 Estimated Cost: 1 Re duce existing wwater quality problems 4caused Goal achieved by failing _septic sy_stems._...........___________ _..__...______.,....__......._._.. �b r Lake Elmo Wellhead Protection Plan L Part 11 32 12781.001 1 � , _._---.__--------___-__.----_-_-____.-_._._.._------.-----------------------_ ' Act as an information/referral resource for best WHP Measure H3-2: management practices and for existing grants or loans for ISTS maintenance. Especially for failing-existing systems. Source of Action: i City Lake Elmo _ __-_-_____---__---.____---_----.___._._________ _ Coo erator s : _SWCD,-Department of Agriculture, Ag_BMP_Loan _ Time Frame: f Estimated Cost: _Staff Time_ _ Goal achieved: Reduce existing water quality problems caused by failing- se tics systems. tm - p ---- ----------------------_...------- ---- -- -- ---- --- � r I i Lake Elmo Wellhead Protection Plan Part 11 33 12781.001 I. OLD MUNICIPAL WELLS OBJECTIVE 11: Properly manage any former city wells to reduce potential contamination of the aquifer used by the city. Determine the status and location of any former city wells Er with assistance from the MDH Well Management Section, as necessary. Locate any technical or financial assistance WHIR Measure 11-1: necessary to seal any well(s) that are located and need to be properly sealed. As appropriate, either properly sealed i- unused, unsealed former municipal wells or obtain the proper maintenance permit from MDH._-._..-.. ------- I Source of Action: l City of Lake Elmo L Cooperator(s): MDH Time Frame: 2010 Estimated Cost: Staff time 4 The location and status of former public water supply wells Goal achieved: are known and a determination is made regarding what `` may need to be done with the wells identified. S ' i L is Lake Elmo Wellhead Protection Plan Part 11 34 12781.001 1 J. AGRICULTURAL STRATEGIES a OBJECTIVE J1: Encourage agricultural practices in the DWMSA to be congruent with wellhead protection principles. ---------_-_ ...... WHP Measure A-1: ; Encourage BMPs for agricultural storage and land mana ement. Source of Action: City of Lake Elmo- _ f Cooperator s : SWCD, Department of Agriculture,A�BMP Loan _ _ --- -- --- Time Frame: t_By 2010 Estimated Cost: Staff time _ l Goal achieved: Reduce water quality problems caused by agricultural runoff or infiltration. f � - i f I I � l I Lake Elmo Wellhead Protection Plan Part 11 35 12781.001 Vill. EVALUATION PROGRAM 4720.5270 t~ The success of the wellhead protection source management program must be evaluated in order to determine whether the plan is actually accomplishing what the City of Lake t Elmo set out to do. The following activities will be implemented to: ■ Track the implementation of the objectives identified in Chapter 5 of this Plan ■ Determine the effectiveness of specific management strategies regarding the L_ protection of the public water supply F ■ Identify possible changes to these strategies which may improve their effectiveness t,.. ■ Determine the adequacy of financial resources and staff availability to carry out the management strategies planned for the coming year. 1. Lake Elmo will continue to cooperate with the Minnesota Department of Health in the annual monitoring of the water supply to determine whether the management strategies are having a positive effect and to identify water quality problems that ,. may arise that must be addressed, 2. The wellhead protection team will meet on an as-needed basis, with a minimum of one annual meeting to review the results of each strategy implemented during the previous plan year and identify and discuss whether modifications are needed for those strategies and additional strategies for the coming plan year. r r. 1_ 1= Lake Elmo Wellhead Protection Plan Part l l 36 12781,001 !tY . IX. ALTERNATIVE WATER SUPPLY; CONTINGENCY STRATEGY (4720.5280) _ An updated Lake Elmo Water Supply Conservation Plan has been submitted to the MnDNR Division of Waters, Appropriation Permit Program in 2006. This plan contains the required elements of the MN Wellhead Protection Rule and is accepted as an equivalent to an Alternative Water Supply/Contingency Plan as defined in 4720.5280, Implementation of the Plan will begin upon approval, with the aid and assistance of local emergency management agencies. A copy of the Plan is available for review at the City Hall or by contacting the Wellhead Protection Manager. ' I f Lake Elmo Wellhead Protection Plan Part 11 37 12781.001 APPENDIX Lake Elmo Wellhead Protection Plan 12781.000 Part 11 f f f f f : f � f ; f f , TABLES f � Lake Elmo Wellhead Protection Plan Part 11 12781.000 N X x X X X x x x x x x x x x x X x X X X X x x x X x x x X xx r x x x xx x xx O O O O O O C O O O O O O O p O b O 4 0 0 0 0 6 0 0 6 6 b 6 6 6 4 6 6 •V C 6 6 6 6 6 6 6 6 6 6 6 O a ' W OO b 6 0 o o 4 b 0 0 0 0 O O O O O 0 0 0 0 0 b 0 0 0 0 0 0 0 0 O O V' V ,Md. 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Table No. 2 Average Precipitation (inches) Wellhead Protection Plan, Part 2 City of Lake Elmo, MN Month 2003 2004 2005 2006 2007 Avera e Jan 0.19 0.36 1.21 0.74 1.01 0.70 Feb 0.79 1.75 1.06 0.15 1.25 1.00 Mar 1.63 1.75 1.40 1.48 2.99 1.85 Apr 1.83 2.14 2.14 2.48 1.85 2.09 i May 6.15 3.91 3.33 3.81 4.06 4.25 Jun 5.02 5.02 6.41 2.76 1.32 4.11 L Jul 2.58 2.56 3.01 1.01 1.32 2.10 Aug0.49 1.85 5.45 7.35 5,95 4.22 , Sep 2.64 4.57 5.21 3.35 5.00 4.15 Oct 1.14 2.60 4.68 0.60 3.83 2.57 Nov 0.79 1.40 1.10 . 1.10 0.09 0.90 Deb 0.86 0.56 1.25 1.89 1.83 1.28 Total (lnJ r) 24.11 28.47 36.25 26.72 30.50 29.21 r *From the Minnesota State Climatology Office, MnDNR Waters Precipitation Station: 210895 BOWLES CREEK , i_ (ti L: Iy Table No. 3 Well Pumping Data (Million Gallons) Wellhead Protection Plan, Part 2 City of Lake Elmo, MN Year Well No. 1 Well No. 2 Total Pumping 208448 603085 (gal) 2002 41.7 0.9 42.6 2003 45.9 18.8 64.7 2004 39.8 16.2 55.9 2005 39.6 16.5 56.0 2006 29.6 52.5 82.1 2007 30.5 111.1 141.6 1 *Well No. 3 is not in use 11 I i 1 1 f i FIGURES I ; I 1 I , I Lake Elmo Wellhead Protection Plan Part 11 12781,000 d, E o Oa z \\4 > Z O a ']4 T N 1 C •��f ♦� III 1 j1 ! Y �. 1, 7+ A r '�I � °►��- ` - fir' ,ly?�� •t<• �ti• �.�" '��9 �+� �u( K�f r • ��-}:��r.��nl!C 1,��1 �� n 11` _rt�_��� r`t .ss ,r ..1 oJ•J�i+1i - - P "r �� �i! r�tl;_,,.: ' `�►' � �� .� Oo '- tit e 1• �� rib i1�77 . .. �66�t•'�.1�,�`' r '�'' - a C) 0CN � oC� :E C, `Iv y < (D tj > 2 CX. < cd 0, ,n CN F- � �,Jt .......... .... . ..... 7TR Cl og Mli -17 4F k�Awwrll,,Iil A AQ�AML-MOL ilk Yy ,'p. P40 pr gr 77 cz. 0 �•' f .�h __, ]' - y - ( i , - 1. 4.V. J.:h+�. �•'; �,! 4'- V ti1i y��. ��-Fz�• '6 �( �•rs�.. ..t-� ;1 µ:. y• 7 .. ..=to y ;�'•,�. `11S 1„ rj r. _ ' +i�.�� -'1.M. � q t ► J,- ` Iv -a �i`'� �� fr.� i S r ' �y� l L�•+� Yam... � tr�i 1 lj•��,"i r �. I ,� i o "(� f1 �,' �� a.. �,, � ~y ., J GR� . . �� :;'H:1 a_ �:`�. :+I.. 'J►f°t$.• , -'---j I. 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I r t 0102921340003 �4' . +s+MT M ! ,��,�1/.•rv '� 1 k r' ! 0102921340002 010292144000 r C C Tr , ''• �' *TyI.X r j�' •�:� ■ © •^ e s ■ ■ eMTESErW-M-a Sit•Cr�rlS�ntrf JUTH ST .'h Y -7 -.-•Y :T ,j �:, LILAC.WAY N .•��+ ? ' _';Is •i.ram• 9 ., , _� .,i w��, i ` ix Z ' :r A _ 4r •t� pi �¢`�1 ( Yw•. ,7 � +r �i rat L tc j y11L Q` SIC 1; a NTTIt �,l•;-�; _T cr- •., `.�+., fs.? o-� ''Slt ! _ .4 � 7l ,,r'r. .4U i � 1_ s' � �' � ��t�a`�• �- .9t4T .rTNr� s k 44TH ST N44TH ST i �• � ��, � ..�`_`.'"- '=,;-gyp'(' � '-r! _ G f. 4 ,I °� r.s,-_ ... .. •. �-r..v..lt H�I��NAL r '. i ► i u Z 'd3RD STN W' •� � 2 � y ►.c- � "- ryl�tr t ICINDRE -.-fir +- r •� JIt A ZR`i -•_1 .! �--c'T*-` - z 1� '• •l ' ,- -' IF • ff% a102921430001 1102921440001 u ' ' �"�'� t r ' 4 ��■ ■ ■ ■ ■ ■ _L�Jl�1ln -- 40TH ST!PMOUNTY ROAD'14) z ! 4ZSllwi S�t°f 1V(G�cwN LY ROAD�4 0) T ` .. .�• W r;.' '" lr••• �_Ayr. 'i0 r ti I � h •�i `a I-- zqy Q I ` t39iH;ST Nr-- �} 3°'Z• _ r' --7 p _� •:' M gyp' / �k 1402921110001E w 9LFl` i2i ��' , s 1 ..■ � .. `..�. .'J dS?ijF t tt iti 177 � S1 � �• , � .. -_z T302921240001 4�•, � i t�� I � � � �� r 1302 1240015 Z Moderate L : ,�h_ 0 c � 29 J 1302921390f78�1E 5 140 21420002 �% 14l�921420001 ,�. 130292124 1 ._ w > 4 f~ it® T 1 30292 1310009 �`�f y '1 SS N c' 71 1302921320038 1302310b14 •- ""�,` ' !, a i� • . C ,::raps- 1 3021134 Q� r +:- /� m �. SAY•?° 001 r, n High �1 ' = d 0 700; �{,400 2;800 r +`•W~ 1302921$30002. Feet. ` m 30T-1 ST N 30TH ST N rIil Ilk � �, t by r�pv�r••�-t�y/,+yt �,Y. �� i R � G�� �.:r r1+.1/ 4�l Legend Pregen TKDA Project No. 12781.000 _ Leaking Underground Storage Tank - Stale Water Use Permit I City of Lake Elmo Air Release Permit Cj Church NPDES Permit Storage Tank(unspecified) I DWS Vulnerability U Gage station � Observation Well < Unspecified Hazardous Waste Generator Permit Pipeline Facility ®-ligh Limitation of Liability CWell This document is not a legally recorded map or survey ' Public Water Supply Moderate and is nolintended to be used as one. This map is a m Individual Sewage Treatment System ,{j[J - t"� g y '` � Lakes compilation of records and information from various & Registered Storage Tank Permit state,county,and township offices,and other sources. ®DWSMA Boundary — — --- Date: Created By: City of Lake Elmo Located PCS1 Minnesota Figure 2 TKDA _ENGINEERS•ARCHITECTS•PLANNERS K:\gis\LAKEELMO\PROJECTS\Wellhead Protection\WHPA-DWSMAMaP-figl.mxd � t G'RZANT (GO�._ - THS-T�1- yo�r►�r��' I� =.��iwa�ri�l1 � �� � , 'd�.i,�,�.,�il.fib � YFi S�" t Tff�H - • =r NO, p. a f" Y�•� •r}N 1� ' �— TT[I1y� ,• y gyp r+. 1g0����'� fI l kti i-- _ fir__ = Tall-4j4Tli ST N LAII E ELMO - r� f f BAYTOWN TOWNSHIP Moderate - _ a iK z 0 650 '1,300 2,600 Fe et W cdh = -• 20T-H-8-T-N — Legend TKDA Project No. 12781.000 CITY OF LAKE DWSMA � _;Cit-r of Lake Elmo ELMO DWS VUllierabillty Parcels High U1111WIC-11 OILlaUlllt; Ohl:dommenl I:no[altgalrf it-xrded wA,cc:kr.ep totoderate a 1Irnc•Inknkd i5be wed at:nt.719:mal Ir a afoplat.n Meccol:.nl hrranialcnt yn:alcu: :gk.¢xnt�.atil k�amP��oriar.anl olxl rune:. Date: Municipal Map Created By: City of Lake Elmo TZXJLOFZXMinnesota Figure 3 I,: , _ -. _�!.' -. r��•'CI,�Ci_T�'h•ti,,,riirr��lteih,::_:iq_�,rFi7.r� _ Soil Map—Washington County,Minnesota (Figure 4a-Soils Map of Well No. 1 DWSMA,City of Lake Elmo) 508500 508800 509100 509400 509700 510000 rn S C ! rn Ip L IIS � .ram 1 -� w 1F f_.,�� , "•'/'+.�j{, F , � , . J: —S`i{C71t71W v. �...� Ilk CJJiiCifY _� 0 y 4 - m N. v Q N y v t 508500 508800 509100 509400 509700 510000 N Meters A 0 150 300 600 900 Feet 0 500 1,000 2,000 3,000 USDA Natural Resources Web Soil Survey 2.0 5/14/2008 Conservation Service National Cooperative Soil Survey Page 1 of 4 OOZ 960 006986V 009986V OD£996V 000996t, OOL 966 006 96V OOL BV o 00 _ N CL I ; N fl ply, E a 4 t _ _ f '• LLIIM w ��:>. '� `�,.•.. ,,,,�;,�„. a I'!•�-�-- z c o e. m mob. N •_�M)W j i:� ,���s'�� - _ _ i '1L?- ,s.;-+`fit �� N a 7 U N I 1iJ _. 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I ....LL • N 10 o 00 --� 9' 1 - l r'!� N 1'lJ 1 �l } • i I - N O L, Z_} I�'l`" ..�1.. �, • �YI�`j:. �� .e .'C7 vq o o 0) o cc Is OOZL86V 006986t, 009996Y 00£996V 000996V OOLS96h ' 0OV996V OOLS86c 1, m v CD co U O ca () a) C w > @ O O V O a 3 C 0 a E 0) a) 0 c cc0i o a) Z@ o rn a) o . m a) N 0) S `o) E LO 3 co — L) a) o cu a) - 'o co E Z > m 4 ` u o m ch _o o OT E c U) a) m m a) _ > U = i to _ co m Z Z :EO v E N 0.Q a) a) C O N a T O L Q a) N cu Oa) L o a O O) c0 C O V/ a) U O a) L U E a) Q) U Q 0) C u/.> Na) � o3a w3 on o E ? mo Za) N co aa)) aN E o rn o a N E T a) 0 s a) rn t 'w m o cn @ a c w 3 Q E 0 Qv, C � .� CO i6 J c0 O � � N L � C N G n T y Z � a) — a) O N O N 'O N C T N ra a) LO ... _O U C a) m a) C @ E @ o 0 V) N co N ca U) U a O @ O "O a L O o V! d N cc U O O N `) a) 0 io E N _ a) a) O C O N 7 a>+ @ O w c .5 c E ` U) fl m U) m o o a) @ a) a) rn3 'mn � o a' > — Z a) E rn@E Y a) .0 @ 0 0 0 L @ _ 0 7 @ L O cu O> o f cn U H w � cn 0 H o o @ >. O a) O _T 3 C U O U) C C''l — T U)w U) N C j 3 U) i0 O U N O Q C O U O o Z o rn— a) U c a) m L A N C N @ T @ - a)CL _ O_ @ @ U) ca O n U s > Z CO @ a a�i w t -o a n a o m a) N a) rn o CO — o cnU) c a m 0 E o O c C9 cn O c of O U 0 O i m 0 a a) u. a is •: W U) a g F a r W J a s Q @ Q a) .N. U) U @ w CaJ) Q)O d O o o n a, u)i n o_ cu .75 w ` oo a@o oo = U) N a) a a a a o 3 co U: t o O a o o ( U Q w o@ g > @ >O C O O O ccn) >m @ C_ CL O L i Q 0 •o co co U U C� C7 J a w O U) U) � U U cn U) C a) a in o c @ a) ® X +► X x O © } + d ❑ o ❑ vai J � )n a N c"a o Z U OI ZA. ' Soil Map--Washington County,Minnesota Figure 4b-Soils Map of Well No.2 DWSMA,City of Lake Elmo Map Unit Legend Washington County,Minnesota(MN163) tt Map Unit Symbol Map Unit Name Acres in A01 Percent of AOl 49 Antigo silt loam,0 to 2 percent 177.7 19.1% slopes 49B Antigo silt loam,2 to 6 percent 76.4 8,2% r slopes 49C Antigo silt loam,6 to 12 percent 11.4 1.2% slopes { 49D Antigo silt loam,12 to 18 16.2 1.7% {I percent slopes 120 Brill silt loam 13.0 1.4% ( r 153E Santiago silt loam,2 to 6 150.8 16.2% ll percent slopes 153C Santiago silt loam,6 to 15 81.9 8.8% 1 percent slopes 155E Chetek sandy loam,0 to 6 1.7 0.2% percent slopes 155C Chetek sandy loam,6 to 12 42.4 4.5% percent slopes 155D Chetek sandy loam, 12 to 25 11.9 1.3% percent slopes 189 Auburndale silt loam 5.4 0.6% 264 Freeon silt loam, 1 to 4 percent 32.2 3.5% slopes 266 Freer silt loam 59.2 6.4% 301 B Lindstrom silt loam,2 to 4 4.8 0.5% percent slopes 302C Rosholt sandy loam,6 to 15 4.7 0.5% percent slopes 342C Kingsley sandy loam,6 to 12 67.4 7.2% percent slopes 342D Kingsley sandy loam, 12 to 18 25.6 2.7% percent slopes 453B DeMontreville loamy fine sand, 3.4 0.4% 2 to 6 percent slopes 453C DeMontreville loamy fine sand, 15.8 1.7% 6 to 12 percent slopes 453D DeMontreville loamy fine sand, 2.6 0.3% 12 to 25 percent slopes 454E Mahtomedi loamy sand,0 to 6 8.4 0.9% percent slopes 454D Mahtomedi loamy sand, 12 to 10.1 1.1% 25 percent slopes 456 Barronett silt loam 8.9 1.0% 468 Otter silt loam 4.0 0.4% . IJ Natural Resources Web Soil Survey 2.0 5/14/2008 Conservation Service National Cooperative Soil Survey Page 3 of 4 i I Soil Map—Washington County,Minnesota Figure 4b-Soils Map of Well No,2 DWSMA,City of Lake Elmo �. Washington County,Minnesota(MN163) ( Map Unit Symbol Map Unit Name Acres In AOI Percent of AOI 1 507 Poskin silt loam 4.9 0.5% f 541 Rifle muck 10.7 1.1% ( 896C Mahtomedi-Kingsley complex, 39.4 4.2% 3 to 12 percent slopes 896D Mahtomedi-Kingsley complex, 7.6 0.8% l _ 12 to 25 percent slopes 1 ' 1055 Aquolls and histosols,ponded 6.5 0.7% W Water 26.9 2,9% Totals for Area of Interest(AOI) _ 931.9 100.0% i 1 , I � 1 USDA Natural Resources Web Soil Survey 2.0 5/14/2008 Conservation Service National Cooperative Soil Surrey Page 4 of 4 co v _ o N N O m O N U O` ca N 0 •C`N O ca )a) O_Lo )p m a a.ca £ c o) a = o mN N C Q) 0 C O ) — d) p)7 r O U'L > ro ` U N N 4 0 OE (0 C � C r �Oww _ U E U a) a) [IfC L N O_ f6 Z � -O U 0 O CQ 7 N L _ o U .O Z ❑ C N O_ C N N C 3 U 7 N c U Q O N N a)N N o � 0 3 oco o ETcaa) Za) N Q' Q.N O N .mE 0) o 2 N M () >' a) c t Q c6 C C > a) N E p cu J (` N N aa) C .0 Q T.N. Z a) — a) p N 0 m a N a) cm ❑ a) N (d cu 0 ' -(OD jC E T a) O) 'co a) a) E Q Q) N N N � .z p -p 7 N m (O jU) a Qc a7 Oa QQ •p U c7n (n a) j C N O_ a7 N a. w F .r10 E o o c o m °' Z. a c ` tea am a) o 'ao m a) rn 3 'm a 7 p N — ? °5 a) E m E Y a) .— c9 O O O L a) 0 7 m L' O cu O > `o E to U f— to v) ❑ F- U .�o O T O O 07 cn T Z 7 c U C, C cV T(n +T j a) O ❑ U N o Q c o U o rn Z a) c m o N w C O j O o m m C O o m m CL 0 U L > Z m c N N c N = L2N3m Na m c N m Q o O o a oU) Eto C 'roU) n m j _ -2 OU n (n OO c CD cLn O am J a) m O F N Q LL C mco t (7 a. W J a. o Q p d a cn N Y � n N _ N N N r .7 ca O. C d O m Qy N n• a� o o c 3 7 � O ° Q a ya v> O a ) w o m O CL V) U a) a a) oCL o i3t o c amN m a O O m O d cu m a) Omma) C d O " (mUdnQ CO m U U 0 a w N n (n n [n n n n 7c 0 y O c 0 y R u, o D ® X ♦ > + a ❑ f y m O Z U 0 fSoil Map-Washington County,Minnesota Figure 4a-Soils Map of Well No. 1 DWSMA, City of (( Lake Elmo I Map Unit Legend f Washington County,Minnesota(MN163) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 49 Antigo silt loam,0 to 2 percent 119.6 27.7% slopes 49B Antigo silt loam,2 to 6 percent 4.0 0.9% slopes 49C Antigo silt loam,6 to 12 percent 0A 0.0% slopes 120 Brill silt loam 1.1 0.3% 153B Santiago silt loam,2 to 6 1.4 0.3% percent slopes ' 155B Chetek sandy loam,0 to 6 1.6 0.4% percent slopes 155C Chetek sandy loam,6 to 12 14.5 3.4% percent slopes 155D Chetek sandy loam, 12 to 25 41.0 9.5% percent slopes 342C Kingsley sandy loam,6 to 12 9.6 2.2% percent slopes 367E Campia silt loam,0 to 8 percent 40.1 9.3% slopes 449 Crystal Lake silt loam,1 to 3 1.3 0.3% percent slopes " 452 Comstock silt loam 5.4 1.2% 453C DeMontreville loamy fine sand, 7.5 1.7% 6 to 12 percent slopes f 454E Mahtomedi loamy sand, 0 to 6 4.5 1.0% it percent slopes 454C Mahtomedi loamy sand,6 to 12 2.1 0.5% i percent slopes j 456 Barronett silt loam 1.4 0.3% 468 Otter silt loam 4.2 1.0% f 507 Poskin silt loam 2.0 0.5% 857 Urban land-Waukegan 41.2 9.5% complex,0 to 3 percent slopes 858C Urban land-Chetek complex,3 77.7 18.0% to 15 percent slopes 896D Mahtomedi-Kingsley complex, 6.2 1.4% 12 to 25 percent slopes 1033 Udifluvents 2.1 0.5% 1055 Aquolls and histosols, ponded 7.0 1.6% ! 1847 Barronett silt loam,sandy 1.0 0.2% substratum W Water 34.9 8.1% 1 y �� Natural Resources Web Soil Survey 2.0 5/14/2008 Conservation Service National Cooperative Soil Survey Page 3 of 4 Soil Map—Washington County,Minnesota Figure 4a-Soils Map of Well No. 1 DWSMA,City of Lake Elmo Totals for Area of Interest(AOI) 431.5 100.0% 1 . S 1 ; � I is 1 1 } UQD Natural Resources Web Soil Survey 2.0 5/14/2008 { Conservation Service National Cooperative Soil Survey Page 4 of 4 1 i $�r�----._ 6OT H 8T-W tr�7Hil :ty 601 H S HIGH1 AY�36 (60TH T Nj It '--- LN � 'Jig M arts '.. HE14GHT ST U.i LAKE ELM10 r _ :�.: � i a ILI —I ` - „P t�TIiLt1( 1 w _- 1 _r r EAYTOWN TOWNSHIP o ate � ea tr,�t�raw j \Y t FI LAVA M R-L-hr T :214 D S N ---- '__ .r � 31�T. Pl ii 0 650 ! ,300 2,600 —W — Feet High g High - WA DT-H-SJ-N — - — -r Laid Use 1KDA Project No. 12781.000 CITY OF C C rakes Wv5 VtJn�atility LAKE LBC3 H►, EL MO L�•_1taiLaF.e9rla MrkdikA NC Bowkqry wrllt,nonorual;mr; RAO-0.45 DLVkre EE�] Parcels lllr.lwmenl I:nol a k9attf re,xrded Ina,cc uruy ail Irnalnknkd k;be uleJ ar a,e.lllr o,allr a RCW amtrlaknoriecdd:a find-imalcr,lan.alcur ----- 7101e.amt•.M1 kren.-VA,anar.ant olxr,arce:. �VR Land Use Ma cuea �' ted By: City of Lake Elmo Lake Elmo Comprehensive Plan 2005 - 2030 TZIL"Z&Minnesota Figure 5 _. �Cf�B+AACI�1T�iS+PL14141«7i8 P;"',;j;�.-��;E E Lt�•t I.i'1G R i;�,1E i,T:3�:Ur_.i ItiN�d N n�tBCailr:li_ai raLl� t�f a;;-�:I�;.rr;�xi GRANT ST N i g `f XV ... AK hAR I. a H E II. � 1 i rr ,� - ---- Q Lj ( t I �}pLsy� J U °r Tii S T N ,-4laa uj AKE L Pyl 0, r {iLR LLt i . U — f�ti derate BAYTOWN TOWNSHIP" 11 � I Iy ` t o 650 1,300 2,600 i. i gh W _ High Feet_ - Zoning Districts GaY OF ; 'A M<DA Project No. 12781.000 LA�1� O P RR ®DUUSMRBoundary KE �_�ABaytown � LBPUD �VR-A � — C. Parcels ELF ® OB RE VR GB --I Lake Elmo Boundary HB DM Villueribility UniItlnonoTLlnbillt, OPIOS VR-R 1 l4gh 'nvl.1cm nenlI:ml akUalt(le u le l U.N.cc uryey LBVR-RR C3 CIA Lra lnknkd to Le used ar cox.nk InapU a R2-PUD ¢mplak�cdlecad:annMnma�cmnn:alcair PF Ivtod erate :uk.aanp.atil bAn:l if M1ac.anl olxt:ane:. - R-1 Zoning Map �fecitetl By: of Lake Elmo Minnesota Figure 6 TKDA. MUSS■ARCI=I,PUMM Ic, _ - --. =E'�;^��'�J'I1.UJE!::'1•Ni",�cllkr._•4r+Pr,.�iectir_,1'1._anfnr_•r,a ;,_ria6.lr,:ii EXHIBITS Lake Elmo Wellhead Protection Plan Part 11 12781.000 I LUG List Wellhead Protection Plan City of Lake Elmo 12781.001 Tom Carr, Mayor Amanda Goebel 1 City of Grant Washington County Public Health 9550 Joliet Avenue North 14949 62nd Street North Grant,Minnesota 55082 P.O. Box 6 Stillwater, Minnesota 55082 Carmen Sarrack,Mayor John Hanson City of Oakdale Valley Branch Watershed District 1584 Hadley Avenue North 4700 West 7th Street Oakdale,Minnesota 55128 Minneapolis, Minnesota 55435-4803 4 . David Beaudet, Mayor Karen Kill City of Oak Park Heights Browns Creek Watershed District 14168 Oak Park Boulevard North 1380 West Frontage Road Highway 36 P.O. Box 2007 Stillwater, Minnesota 55082-2104 Oak Park Heights, Minnesota 55082 l : William Hargess,Mayor Matt Moore City of Woodbury South Washington County Watershed District 1 8301 Valley Creek Road 8301 Valley Creek Road Woodbury, Minnesota 55125-2320 Woodbury, Minnesota 55125-2320 Kent Grandlienard Art Persons Town Board Chair MDH Planner Baytown Township. 18 Woodlake Drive Southeast ! 4220 Osgood Avenue North Rochester Minnesota 55904 Stillwater,Minnesota 55082 Dan Kyllo Mr. Jim Kelly Town Board Chair Minnesota Department of Health West Lakeland Township 625 Robert Street North 13520 North Greenwood Trail P.O. Box 64975 } Stillwater, Minnesota 55082 St. Paul. Minnesota 55101 Susan Hoyt Jack Griffin City Administrator TKDA City of Lake Elmo 444 Cedar Street, Suite 1500 3800 Laverne Avenue N. St. Paul,Minnesota 55101 Lake Elmo, Minnesota 55042 r I J� eo .A ° ° . o W t1 00 bM O14 �7yy{ b �p u 3 � � m a%S �� �a ,�,eq3�•-•� �+ �oyN �'� c � o 1;z ego ° bo 00 i , I � p w �0 u o � � �� > Q ° o l 4� 1y y� qq �1 (F Qle $ tA N o � •4� � � ��o+ o � ��� �c, m 3 k. Yea All v 41 � � � Pit a N 44 o O 01 Yi s'oD INNER WELLHEAD MANAGEMENT ZONE(IWMZ) - .POTENTIAL CONTAMINANT SOURCE INVENTORY (PCSI) FORM + _ PUBLIC WATER SYSTEM INFORMATION COMMUNITY PWS ID: 1820009 4 NAME: Lake Elmo 1 ADDRESS: Lake Elmo Water Superintendent, 3800 Laverne Avenue, Lake Elmo, MN 55042 FACILITY (WELL) INFORMATION NAME:##1 FACILITY ID: 301 UNIQUE WELL NO: 208448 COUNTY:Washington CONSTRUCTION INFORMATION Well Information Collected from: O Well Log (if available, please attach a copy of the well log.) O Verbal Date Constructed: Serviced By: ' 11N1 s20009 sot ��;: f ,_ .r� QUE,WELL'.kNO' 20844$ N 2t �i r ,r a t+ f ti;n ,- ISOI A'I EON CfISTp►NCESt SEE f �'` f' ^y:LQA7jON',u: kljry''trr'_jg L �7*mot t rbt s? � ; s t F �� ✓ y r. ACTUAL OR,POTENA[: 1, n�t t ti� � Minimum Distances Sensl- Within Dist. f ' CONTAMINATION SOURCE r nor �r from Est. 4 Community Noncomm= tive 200 Feet (?) unity WeEI* Y/N l U Well vf> '/...+mot.•'r .!-r.r. a+ - -"' -f ei--- :r r . t A ricultural Related s ACP jAgricullural chemical storage or prep.area,>25 gals.or 100 ibs.dry weight 150 150 N ACS Agricultural chemical storage or prep,area with safeguards 100 100 N ACT Agricultural chemical supply lank 50 50 N ACR Agricultural chemical storage or prep.area with safeguards and roofed 50 50 N ADW Agricultural drainage well 50 60 N AAT Anhydrous ammonia tank 50 50 N AFL Animal feedlot 50 50 100 N APB Animal or poultry building 50 60 100 N MSA Animal manure storage area 100 100 200 N AMA Animal manure application(storage or stockpile) 50 100 N ASS Animal burial site 60 50 N .FWP Feeding or watering area within a pasture 50 60 100 N OSC Open storage for crops use discretion use discretion N SKY Stockyard 50 50 N Class V M ection Wells GPR Gravel pocket receiving clear water drainage 30 NIA Y 60 IWD Industrial waste disposal use discretion use discretion N • LCC Large capacity cesspools illegal Illegal N MVW Motor vehicle waste disposal illegal Illegal N. ISTS Related CSP Cesspool 75 75 160 N DRA Drainfleld-above or below grade so 50 100 Y 85 DRA Drainfield-above or below grade 50 50 100 Y 168 AGG Dry well,leaching pit,seepage pit 76 75 150 N HTK Holding tank 50 60 1 N PRV Privy 50 50 100 N SET Septic tank 50 50 Y 157 SET Septic tank 50 50 Y 178 SLS Sewage IIR station 60 50 N SSW Sewage sump,watertight 50 20. N SSN Sewage sump,non-watertight 60 50 N SBA Sewer buried,approved,air tested 50 20 N SBM Sewer,buried collector,municipal,pressurized,open jointed,or unapproved materials 50 So N SBP Sewer buried,pressure,approved,air tested serving a single family residence 50 20 N Land Application. . FWS Food waste(note distance from well) use discretion use discretion N SPT Septage(no(e distance from well) 50 50 N [ 6122/2008 1 PWS�ID 'f'FACIL�TYID l820009 S01 �` zUNIQEJ, WELL NQ z4' 20844_8 y �, _ ' }4 uc_ISOL,ATION;DISTAN,C.ES_ FEET „'#,r;>: ,':LOCA71QtJ ` A"CTUAL,�R POTEI�T,IAL` `r r�,; Minimum Distances Sensi- Within Dist. "CDNTAMINAT ON`SOUR�E :' `�`� from Est. CORE + F 1 1 ti Community Noncomm- tive 200 Feet (�y ^ unit Well* Y/N 1 U, p Well SSG I Sewage sludge 50 50 N WAS 1 Waste 50 50 N Solid Waste Related COS Composting site(publirloommerclal) 60 50 N CBI- Construction debris/demolllion landfill 50 50 N DMP Dump 150 150 N SVY Salvage yard 50 50 N SLF Sanitary landfill 150 150 N SWT Solid waste transfer station 50 5o N Storm Water Related SWD Storm water drain pipe,12Inches or greater 50 20 N SWR Storm water retentlon basin greater than 1000 gals. 60 50 N SWB Storm water Infiltration basin greater than 1000 gals. 60 50 N SWI Storm water injection well 50 50 N Wells W EL Operating well use discretion use discretion N UUW Unused,unsealed well or boring 50 60 N MON Monitoring well use discretion use discretion N General PLM Contaminant plume 60 50 N DWT Discharge of water treatment chemical waste 60 50 N —DRD Drainage ditch(holds water six months or more) •50 60 N i l` GRV Grave 50 50 N HSP Hazardous substance storage or prep.area,>25 gals.,or 100 Ibs,dry weight 160 150 N HSS Hazardous substance storage lank with safeguards 100 100 N IWS Interceptor(waste) 60 50 N PSP Petroleum storage or prep,area,>25 gals.,or 100 Ibs,dry weight 160 150 N PSS Petroleum storage tank with safeguards 100 100 N PSU Petroleum storage tank,underground,less than 1100 gals. 50 60 N RSA Petroleum storage tank,above ground,less than 110o gals. 5o 20 N LPN LP Tank 5110 6110 N PIT Pit 50 20 N _ PCH Pollutant,contaminant,or hazardous substance 50 50 N REN Rendering plant(note distance from well) use discretion use discretion N RSS Road salt storage 5o 50 N WAT Stream,river,pond,lake,wetland 60 60 N SPI Swimming pool,In-ground 50 20 N UFS Unfilled space 60 20 N e WSP Waste stabllization pond 150 160 N Miscellaneous he Items in this section need to be recorded but not Indicated on the ma . BLD Building(does not contain any actual or potential contaminant sources.) 3 3 N BPO Building projection,overhang 3 3 N ETL Electric transmission line 6/10 5110 N ETE Electric transmission line in excess of 50 kv 25 25 N FFH Mrs or flushing hydrant 10 NIA N FPH Frost proof yard hydrant 10 10 N GSP Gas pipe 5110 5110 N HWF Highest water or flood level 50 NIA N PLE Property line or easement 50 NIA N Additional Sources if there is more than one source listed aboy please indicate here. A sensitive well has less than 60 feet of watertight casing and less than 10 feet of Impervious material between the wail Intake and the land surface. i 5/22/2008 2 x i PWS'ID °/ E'ACILITY,,1D`;� 1$20009 S01U�NIQUE`WELG�NOLF 208448 {:M�: �r>. .i•,'�";'t^':t' 17 SE' ?t^' 'n- 1!Lk� �- r, , tt. ti t _-'.Y"i sY.:lr P •Y. '—}.. _�'i %�s's4;:ti:1x.-c.. ;.,.k;'; Yl r.. �'ri: "11t?z Z s�-- c) r�� �#..,c`N'���'�;+� 4 ;i; t. ,R, ltP :',a;T,:�a,.U. ti,r a- F„!-;i ?i�'J .x +.tr,.. ir'k' .i •i•: _ �1, - - tf :{G.� ...x- t4na•c..�i i�i:Y� .n5• 6 l,f , : � 4 yalSY}'�� �i'x}'S{iyibt�i i- 'r s't'r�Y? .'511- . ?1; ,� F gR NCEs 1 4SET�A►CK DISTA.... .... �. �l YtPr.jTi Pd.:'. f1i ..� 1 '�Y•� r,. �3 ..v.5.,,.r All potential contaminant sources must be noted on sketch. Diagram the location and approximate compass bearing of each potential contaminant source from the well, j and identify the source using the"Source Code." Include a slope indicator and property lines. Ir 315' 45" SET C� 50, 100, 150'_ 200' 270'- 90° T (PR PR � i 225' 135° I . f 180, l � Y Hoerr Robyn 1 `Q'ATEy 05/16/2008 INSRECTOi7 - ,- 5122l2008 3 4 FACIl.1TYID3' 1820009 801 ; ,l1NEQUErWELi:NO r y 208448 A - .•:N = .z :yt I V ! .se �} _, r { aa7 f r Ott �uuxs ,jar b gy tE ,; tcvlT k'� Ss 4 -•-ti = e A 3`r- _ -x l - a '�frh .{,•RC-rF1; ,tL�iWeHheatl �-43 ,liay�k t.x� ll�tl r't! ' tylr ark Pro ection S ?l l u54 (i�. 1 -1 1n ;t!.'f'11,. \i- d 31�. ,1 - fr•L. 3 C. ! Ili ik ll -,1 ] 4.;= li jjb'^�IteasUretly 1�'-S't. y �f�GU,,1.'T.' Wellhead Protection Measures i 3= ���,r��ijc h,#� r A V,���t •w, .,,rc ,. .t t ,��3,Lf� ,� e1. jkrr } tkt V��tit `•. r I t.. IA i..}' .ry•�It 'rti. For an individual sewage treatment system(ISTS)located•on adjacent property within 200 feet of the well, educational material explaining the operation and maintenance of an ISTS could be distributed.Information /21Q815115 Is available from the Minnesota Pollution Control Agency(www.pca.state.mn.ustprogramsfists or 1-800-657-3864)and the University of Minnesota Extension Service se tic.umn.edu or 1-800-322-8642 . t The condition of individual sewage treatment systems should be periodically evaluated,and any identified maintenance issues addressed. This can help minimize the potential for contamination of the water /2/08/5/15 supply. Floor drains,such as In pumphouses,that discharge to a gravel pocket or seepage pit should have a"No Dumping"sign posted. /2I08/5/15 =ii :i,ki-> ,s5- sr- Gr;fl_�1_;,,: r, t-r-„f�-•7r, _ -- , n': °I .'. . �i5"`=i: 'y';$'2r.;r„-5f•iY:i 1 to 1 •cam � � i� �'-x- -L s'ba,''.� 't x• �f't t }, �z -�-y3 ..2,,�' ��+h 's. .f s r�'s'g Tlsolatton disfiances matntainedlfor newtisourcestio contamination? � ,- �' Y N N/A" i-5 ! n 4 t7a1 tl -- r rr -a J ]! 'Fr i `' ''tl„C"''•� y,.''Y" x •.a rzf a"�'+•- 1.31•b '4I�"3r4, bs... r�, .1+ 3'sT•+su' .-. i: r �M,, s 5_.v�.:, t'�;' r>,. :,. "rrs. h•` -xr+_u r^ t-q G^S_'~1 `- t''�} -a?,,,F ]='z �:+ - .:s: ["' S-- '.;:Mc: Mon�te�r` ni g existtrig n`otnconfom ng sa'urces of;c'ontamin°atin? � _ , `krvel Y N NIA t :•t, ..f�._9-F t.-.`4r .tom:, �; ..,Y.. h.�. .,si+, '..F'.i.�•f_Y.tir T.a�F.r ,lt."�'.d-.J:-. .rt 7f.t_?`-:1 rlry ter... ,",Si,3.x.�.:ti,4t'...:.vlJ:l."•?+.. Comments- i.! I ( .. T i • 1 For further Information, please contact the Minnesota Department of Health, Source Water Protection Unit,at: -Unit Receptionist-651/201.4700 or 8001818-9318 -1"DD(651) 201-6797 or for Greater Minnesota through the Minnesota Relay Service at 1-800-627-3529 (ask for[651] 201-5000) # 6/22/2008 4 INNER WELLHEAD MANAGEMENT ZONE(IWMZ) - POTENTIAL CONTAMINANT SOURCE INVENTORY(PCSI) FORM PUBLIC WATER SYSTEM INFORMATION COMMUNITY PWS ID: 1820009 NAME: Lake Elmo ADDRESS: Lake Elmo Water Superintendent, 3800 Laverne Avenue, Lake Elmo, MN 55042 FACILITY WELL INFORMATION NAME:#2 FACILITY ID: S02 f UNIQUE WELL NO: 603085 COUNTY:Washington CONSTRUCTION INFORMATION Well Information Collected from: ❑Well Log (if available, please attach a copy of the well log.) ❑ Verbal iDate Constructed: Serviced By: I, pUi1S�ID /f FACILITY'ID:;' 1820009 S02 ,UNIQUE WEI.L'NO y: 603085 - r ,_,t 4� :-3 - az s ti z cap �j to r.;�•J`'iSOI?ATION DISTAI�ICES FEC.; L'OC;4710IV„ ,PCSI ` s ,ACTUAL OR l'Oi ENTIAL`! �, Minimum Distances Sens[• Within Dist. �r �,,` '��_ r 4t�; F� CONTAMINATlQN SOURCEL `, Community Noncomm- tive 200 Feet from. ,CODE unity Well* Y/N/U Well A ricultural Related •... _ �_,._._� .. _._. _. ,:-- . ACP Agricultural chemical storage or prep.area,>25 gals.or 100 ibs.dry weight 150 150 N ACS Agricultural chemical storage or prep.area with safeguards 100 100 N ' ACT Agricultural chemical supply tank 60 5o N ACR Agricultural chemical storage or prep.area with safeguards and roofed 60 60 N ADW Agricultural drainage well 60 50 N fff AAT Anhydrous ammonia tank 50 1 50 N l AFL Animal feedlot 60 50 100 N APB Animal or poultry building 60 50 100 N MSA Animal manure storage area 100 100 200 N AMA Animal manure application(storage or stockpile) 50 100 N ABS Animal burial site 60 60 N FWP Feeding or watering area within a pasture 50 60 100 N OSC Open storage for crops use discretion use discretion N SKY Stockyard 60 50 t N Class V In ec#ion Wells GPR Gravel pocket receiving Clearwater drainage 30 NIA Y 35 IWD Industrial waste disposal use discretion use discretion N LCC Large capacity cesspools Illegal Illegal N MVW Motor vehicle waste disposal Illegal Illegal N 1STS Related CSP Cesspool 75 75 150 N DRA Drainfield-above or below grade 50 50 100 N AGG Dry well,leaching pit,seepage pit 75 75 150 N HTK Holding tank 50 5o N PRV Privy 50 50 100 N SET Septic tank 50 50 N SLS Sewage lift station 60 50 N SSW Sewage sump,watertight 50 20 N SSN Sewage sump,non-watertighl 50 50 N SBA Sewer buried,approved,air tested 50 20 1 1 N SBM Sewer,buried collector,municipal,pressurized,open jointed,or unapproved materials 50 50 N SBP Sewer buried,pressure,approved,air tested serving a single family residence 50 20 N Land A llcation FWS Food waste(note distance from well) use discretion use discretion N SPT Seplage(note distance from well) 50 50 N SSG Sewage sludge 50 60 N WAS Waste 5o 5o N 6/22/2008 1 ID05C�LI7N 1D , 1820009 S02 °U[VIQUE 1NELL CVO, ,, " 603085 4 (-. ISDLA`fION'D15TANCS° FEET '. LQ.GIaTION '. PCSI ACTUAi_OR POTENTIAL f� in mum Distances Sensi- WifhEIn CODEr' s CO�VTAMINA► iON SOURCE ` ' ,} Noncomm- tive �200 Feet from Est. Community unity Well* Y!N 1 U Well co Solid Waste Related COS Composting slte(publidcommercial) 50 6o N CBL Construction debris/demolition landfill 5o 50 N DMP Dump 150 150 N SVY Salvage yard So 50 N SLF Sanitary landfill 150 150 N SWT Solid waste transfer station 50 50 N Storm Water Related tSW Storm water drain pipe,12 inches or greater 50 20 N Storm water retentlon basin greater than 1000 gals. 50 5o N Storm water Infiltration basin greater than 1000 gals. 50 50 N 5WI Storm water injectlon well 50 50 N Wells WR Operating well use discretion use discretion N UUW Unused,unsealed weli or boring 60 50 N MON Monitoring well use discretion use discretion N I General PLM Contaminant plume 50 50 N DWT Discharge of water treatment chemical waste 50 50 N DRD Drainage ditch(holds water six months or more) 60 50 N GRV Grave 50 50 N HSP Hazardous substance storage or prep.area,>26 gals.,or 100 lbs,dry weight i 5CF 150 N - - - HSS Hazardous substance storage tank with safeguards 100 100 N IWS Interceptor(waste) 50 50 N PSP Petroleum storage or prep.area,>25 gals.,or 100 lbs,dry weight 150 160 N PSS Petroleum storage tank with safeguards 100 100 N PSU Petroleum storage tank,underground,less than 1100 gals. 50 6o N PSA, Petroleum storage tank,above ground,less than 1100 gals. 60 20 N LPN LP Tank 5/10 6/10 N PIT Pit 50 20 N PCH Pollutant,contaminant,or hazardous substance 60 50 N REN Rendering plant(note distance from well) use discretion use discretion N RSS Road salt storage 50 60 N WAT Stream,dver,'pond,lake,wetland 60 50 Y 150 SPI Swimming pool,In-ground 50 20 N UFS Unfilled space 60 2Q N WSP Waste stabilization pond 150 160 N Miscellaneous The items in this section need to be recorded but not indicated on the map.) BLD Building(does not contain any actual or potential contaminant sources.) 3 3 N BPO Building projection,overhang 3 3 N ETL Electric transmission line 5110 5/10 N ETE Electric transmission line in excess of 50 kv 25 25 N FFH Fire or flushing hydrant 10 N/A N FPH Frost proof yard hydrant 10 10 N GSP Gas pipe 5/101 silo I I N HWF Highest water or flood level 50 N/A N PLE Property line or easement 50 NIA N Additional Sources if there is more than one source listed above lease indicate here. A sensitive well has less than 50 feet of walerilght casing and less than 10 feet of Impervious material between the well intake and the land surface. $12212008 2 hFAW,SxD fl"F �CiLIT ;IDf 9820009 S02 UNIQUE WE-L'L+N fi03085 :a�.e p -re^rru .•�,. - ,ay.n.: "x-„��. rU - tfa::c:Y < -n�- -4[^: .n�- �r-kY ecg :�';?. -e,,ir �...,• +r. ',n,�f2 F-N- �,Ar. ,?fig". 1:-.n.:#'a•,t.�'t 1"'.qif Y t,a�' i'T ti a. -a.:,. n�! - A�i ,,:�, Lr h?r;S%L ". Y- .iS!�'E`_s--,�.``,r�����ppp n'1 �-�4��.- ,t.ni:"d: rr;�',. `::i�s�l•:Fr 5-�n..: a�.T, _4 e': _ � ts. y, 7 d.;j „5. N .i ..sy c'.r.ly, a�:'SU':..i ,R .�>,y. �,{ 'Y�r.Sb�-.i�.'��f"S�d° ,f.^X::2. :f,r...`s',, 3 Y. .,r.i;1++>•J.uu+9'r_>na'.'—l�-.:a s.}'' �.8�S:lrS -S�C� Sso'1ti�Y:` ��' 4 +:.,.1<'I � .-7�, �S;i 1,ri�;�i�: ::�5 .ia,b7-, ��-1:�' ,x� k �;n�., ..4i,�,a^`� _° r .� �,•;A.: ,r>" � <<,`,'rvr r s�� -s'G�""�" tic. >s._.s�ka..g,1,i^<y:(-f k J � y..:dt,:.;f":,, ,tA�;;�,_,.�Ss_al.� - ?�;�SETiB1�1CK;D�S1'I�►NCESF���.����'k;tN���,r 5��-�s;,,�:,�;�t,;�:;�. ��' `��_�`� �:�j,°,� ,,-;" �>,.��=g�,°����<'��' ?':,f��r�",s��',�:�� �,r =�,,-:.e.,�=N.rW r, rrx4,,. -==I All potential contaminant sources must be noted on sketch. Diagram the location and approximate compass bearing of each potential contaminant source from the well, f and identify the source using the"Source Code." Include a slope indicator and property lines. 4 . 1 0" 1 315° 45, f f I ( &FAR 2700AT 50' 100 150, 200'_90' 225° 135" Ir 180° 1 I! 4'y INSP,ECG�'�OR�� = Hoerr, Robyn 'r�xDA E Ft 05/1512008 5/22/2008 3 PWS ID !`FACII 1TY"fDs;- 1820009 S02 L UI�ICUE WELL iJ0 603085 Yh; ` 1..1 {�i - bl:tT} r{ > -?5 41,'i+t w !- ,r* ' �'� -i. -1 ''[xr)-tiJ, +.•�_ lNelihead ar5r aC-y - i- � _-•T Ali .Y ti 7'3t a dFrotection -� y Date< , ., _ tyT �� 1 Wellhead'protection Measures Al"h / t - d 5 i U r 'i ak N tj rCr>,tt1 t,E 1 Gv 11IIIr_ F' I y .. - r�:� ,.F -�.t- C.c�,t 4-�'-r.�a pM S tlr r- �.L�?-,r�[,:r�i. �c ail;t.k.���.FY nA.i�J';;dr;?;'h�!�,w,yic=�t��:�'�`'��o-�?+��A f�l}+t`.z•� 'r' .. Isolatian'distances{mainfained A#orsnewfsources of contamination? r$ � � �F Y N N/A z O "L =}'j•S}'.r�::�:7�ta�,.,i�y�,��.,;,,e,' �r.;Si= � "s�;x�2>_£'�}-'s'.�5,<..?'A'ti4�'- '�'r-y�' i}+�� �-���17 r°t�n. e�r ,e'>i 94�j}'"2''Fr�r`�.t,js 1�� �--a��e'-r•' <Monitoring,existm'g nohconforning sources a#contamination7is '� t=rYxt ,F �---�� � ..��,,.•. _.� �.� ti�.I.a. Jew Y N NIA ^,3+..—�.7":J�S ,r"Y. �,�tis�1-.,.{ ,t'p?`T,+.r�?... �;1^•;2+, �,r+.[',. -1'Y""_.a:t±i,- ,a .r y.�rLLs:r.'�:Gi... ;G !4.7_.., r-?:R5'rr!YTIr...�.'�rr";.i.7! i Comments: i For further information, please contact the Minnesota Department of Health,Source Water Protection Unit, at: - Unit Receptionist-651/201-4700 or 8001818-9318 -TDD(651) 201-5797 or for Greater Minnesota through the Minnesota Relay Service at 1-800-627-3529-(ask for(651] 201-5000) �. 6122/2008 4 LA V-6- Water .. ' worker, or employee upon the building shall cause or allow any service pipe to be hammered together at the ends to stop the flow of water, or to save expense in removing the pipe from the main, the owner of the building, the worker, and contractor shall, upon conviction of the violation, be subject to the penalties as set forth in § 10.99, and shall remove the service pipe from the main. If the contractor, worker, or employee fails to do so on 24 hours notice, the contractor, worker, or employee shall be obligated to pay the city the cost incurred by it for the removal. (1997 Code, § 600.16) Penalty, see § 10.99 ` § 50.38 WATER.PIPE CONNECTED TO PUMP, WELLS, OR TANK. No water pipe of the water system shall be connected with any pump, well, tank, or piping that is connected with any other source of water supply, and when these connections are found, the Building Official shall notify the owner to disconnect the connection. If not done immediately, the water supply shall be turned off immediately. Before any new connection to the water system is permitted, the I Plumbing Inspector shall ascertain that no cross connection will exist when the new connection is made. No person shall permit water from the water system to be used for any purpose except upon the person's own premises unless written consent is first obtained from the city. ' (1997 Code, § 600.18) Penalty, see § 10.99 § 50.39 WATER CONNECTIONS FOR NEWLY ACQYJI1ZEn CITY PROPERTY. In any and all cases where water mains of the city have been or shall be extended to or constructed in any road, street, alley, or public highway, adjacent to or outside the corporate limits of the city, the Council is authorized to issue permits to the owners or occupants of the properties adjacent to, or accessible to, the water mains and to make proper water service pipe connections with the water mains of the city and to be supplied with water in conformity with and subject to all the terms, conditions, and provisions of this chapter. Persons accepting the service shall agree to be bound and obligated by the ordinance. (1997 Code, § 600.19) § 50.40 RESTRICTIONS CAUSED BY WATER SHORTAGE. (A) VIhenever the Council determines that a shortage of water supply threatens the city, it may, by 1 1 resolution, Iimit the times and hours during which water may be used from the water system for lawn and garden sprinkling, irrigation, car washing, and other uses specified in the resolution, (B) Notice of the limitation shall immediately be mailed to each water consumer. l I 12 Lake Elmo - Public Works (C) Two days after the mailing of the notice, any water consumer who shall cause or permit water , to be used in violation of the provisions of the notice shall be charged a fee as set forth from time to time by Council resolution for each day of the violation. (D) This charge shall be added to the water consumer's next water bill. Continued violation is f prohibited and shall be cause for discontinuance of water service. (1997 Code, § 600.20) l. , § 50.41 PRIVATE WELLS. G, (A) Dual water system. Except as provided in division (B), a private well may be maintained and continued'in use after connections made to the city water system, provided that there is no means of cross connection between the private well and the city water supply at any time. Hose bibs that will " enable the cross connection of the 2 systems are prohibited on internal piping of the well supply system, f Threads of the boiler drain of the well volume tank shall be removed or the boiler drain hose bib replaced with a sink faucet. Outside hose bibs will not be installed on the municipal water system where dual water systems are in use. (B) Sealing of well required. A private well which has been declared to be a known or potential health hazard by resolution of the City Council shall_ be sealed pursuant to the regulations of the Department of Health. (1997 Code, § 600.21) (Am. Ord.,97-166, passed 3-6-2006) Penalty, see § 10.99 § 50.42 WATER. COOLED AIR CONDITIONING SYSTEM. No water cooled air conditioning systems shall be connected to the water system. (1997 Code, § 600.22) (Am, Ord. 97-29, passed 4-21-1998) Penalty, see § 10.99 § 50.43 OPERATION OF FIRE HYDRANTS. - (A) No persons, other than authorized city employees, shall operate fire hydrants or interfere in any way with the water system without first obtaining a permit to do so from the city, subject to the following conditions. _ (B) (1) Use offire hydrant. A permit to use a fire hydrant shall be issued for each individual job or contract for a minimum period of 30 days, and for additional 30-day periods as are requested and p y yP 9 deemed necessary. The permit shall state the location of the hydrant and shall be for the use of that hydrant and none other. f l! 2008 S-2 Unique No. 00208448 MINNESOTA DEPARTMENT OF HEALTH — 1 Update pate 2005/03/11 WELL AND BORING RECORD County Name Washington Minnesota Statutes Chapter 1031 Entry Date 1989/07/11 Township Name Township Range Dir Section Subsection Well Depth Depth Completed Date Well Completed 1 29 21 W 13 CBCDA 805 ft, 805 ft. 1962/04/00 Well Name LAKE ELMO 1 Drilling Method Cable Tool Well Owner's Name LAKE ELMO 1 Drilling Fluid Well Hydrofractured? ❑ Yes ❑ No 3303 LANGLY CT From ft.to ft. r LAKE ELMO MN 55042 If _Contact's Name CITY OF LAKE ELMO Use Community Supply(municipal) 3800 LAVERN N AV Casing Drive Shoe? ❑ Yes ❑ N Hole Diameter LAKE ELMO MN 55042 in.to 805 ft GEOLOGICAL MATERIAL COLOR HARDNESS FROM TO Casing Diameter Weight(lbs/ft) SANDY CLAY 0 12 20 in.to 280 ft fSAND 12 32 SAND&GRAVEL 32 72 CLAY BROW 72 82 CLAY BLUE 82 97 Screen N Open Hole From 280 ft.to 805 ft. CLAY,BROWNISH-RED 97 112 Make Type HARDPAN 112 152 FINE SAND 152 167 ROCK&CLAY 167 222 Static Water Level 110 ft.from Date 1962/04/00 CLAY,GRAVEL&ROCK 222 253 I PUMPING LEVEL(below land surface) CLAY,GRAVEL& ROCK 253 257 j 153 ft.after hrs, pumping gpp g,p.m. { SANDROCK 257 272 Well Head Completion i SANDROCK&SHALE 272 297 Pitless adapter mfr Model f I Casing Protection W 12 in. above grade SANDROCK&SHALE 297 307 I ❑At-grade(Environmental Wells and Borings ONLY) SHALE 307 345 Grouting Information Well grouted? S6 Yes ❑ No SHALE 345 402 Material From To(ft.) Amount(yds/bags) G ^- 0 280 SHALE&SANDROCK 402 513 SHALE&SANDROCK 513 570 SHALE&SOME SANDROCK 570 669 SHALE&SOME SANDROCK 669 682 Nearest Known Source of Contamination SANDROCK&SHALE 682 748 ft. direction type -- Well disinfected upon completion? ❑ Yes ❑ No SANDROCK 748 805 Pump ❑ Not Installed Date Installed Y Mir name Model HP Volts REMARKS, ELEVATION,SOURCE OF DATA,etc. Drop Pipe Length ft. Capacity g.p.m GAMMA LOGGED&TV 11-30-1998. _ Type T Any not in use and not sealed well(s)on property? ❑ Yes ❑No Was a variance granted from the MDH for this Well?❑ Yes ❑No USGS Quad Lake Elmo Elevation 935 — — — Aquifer: CJMS Alt Id: 61-1031 Well.CONTRACTOR CERTIFICATION Lic.Or Reg. No. 620f2 -� License Business Name Report Copy Name of Driller JOHNSON, R. HE-01205-06(Rev.9196) Unique No, 00603085 MINNESOTA DEPARTMENT OF HEALTH Update Date 2005/03/11 WELL AND BORING RECORD - ---- � County Name Washington Minnesota Statutes Chapter 1037 Entry Date 2001/11/20 Township Name Township Range Dir Section Subsection Well Depth Depth Completed Date Well Completed 29 20 W 6 CBBBBB 285 ft. 285 ft. 2001/09/18 _ Well Name LAKE ELMO 2 Drilling Method Cable Tool Well Owner's Name LAKE ELMO 2 T Drilling Fluid Well Hydrofractured? ❑ Yes [_V] No 55TH N ST Bentonite From ft.to ft. . � LAKE ELMO MN 55042 _..... Use Community Supply(municipal) Contact's Name CITY OF LAKE ELMO -- - — --- --- } 3900 LAVERN N AV Casing Drive Shoe? []Yes ❑ N Hole Diameter LAKE ELMO MN 55042 in.to 285 ft I GEOLOGICAL MATERIAL COLOR HARDNESS FROM TO Casing Diameter Weight(lbs/ft) i SAND/ROCKS BROW SOFT 0 48 24 in.to 108 ft 94,62 -- 18 in.to 182 ft 70.59 CLAY RED SOFT 48 62 ---- GRAVEL YELLO SOFT 62 108 I LIMESTONE YELlTA HARD 108 187 SANDSTONE YELLO MEDIUM 187 197 Screen N Open Hole From 182 ft.to 285 ft, LIMESTONE YELLO HARD 197 200 Make Type i I SANDSTONE YEL/O MEDIUM 200 275 I SHALE GRAY MEDIUM 275 285 Static Water Level 52 ft.from Land surface Date 2001/09/05 i PUMPING LEVEL(below land surface) 80 ft. after 8 hrs. pumping 1000 g.p.m. Well Head Completion Pitless adapter mfr Model Casing Protection 12 in.above grade ❑At-grad a(Enyironmental Wells and Borings ONLY) Grouting Information Well grouted? 0 Yes ❑ No a Material From To(ft.) Amount(yds/bags) G - ------- Q---- 182 16 Y 1 11 Nearest Known Source of Contamination 150 ft. direction W type BOW 11 Well disinfected upon completion? R Yes ❑ No Pump S/71 Not Installed Date Installed N E� Mfr name Model HP Volts , REMARKS,ELEVATION,SOURCE OF DATA,etc. _ Drop Pipe Length ft. Capacity g•p•rn M,G.S.NO.4168. Type Any not in use and not sealed well(s)on property? ❑ Yes (V] No Was a variance granted from the MDH for this Well?❑ Yes ©No USGS Quad Stillwater Elevation 940 --- --— -- Aquifer: OPCJ Alt Id: 1820009S02 Well CONTRACTOR CERTIFICATION Lic.Or Reg. No. 62012 License Business(Jame Report Copy Name of Driller ALLAN,J. HE-01205-06(Rev.9/96) f i Unique No. 00655910 MINNESOTA DEPARTMENT OF HEALTH - - __ - - ---- _- j Update Date 2005l06/30 WELL AND BORING RECORD f County Name Washington Minnesota Statutes Chapter 1031 Entry Date 2003/01/23 { Township Name Township Range Dir Section Subsection Well Depth Depth Completed Date Well Completed k 29 21 W 33 DDAA 422 ft. 422 ft. 2002/12/30 Well Name LAKE ELMO 3 Drilling Method Cable Tool Well Owner's Name LAKE ELMO Drilling Fluid Well Hydrofractured? ❑ Yes ❑ No 8650 HUDSON RD Water T From f ft.to ft. LAKE ELMO MN 55042 Use Community Supply(municipal) Contact's Name CITY OF LAKE ELMO 3800 LAVERNE N AV Casing Drive Shoe? !,] Yes ❑ N Hole Diameter LAKE ELMO MN 55042 in.to 422 ft GEOLOGICAL MATERIAL COLOR HARDNESS FROM TO Casing Diameter Weight(lbs/ft) SAND,GRAVEL, CLAY BROW SOFT 0 90 30 in.to 97 ft 118.76 SANDROCK YELIW MEDIUM 90 193 24 in, to 281 ft 94.71 LIMESTONE(BUFF) HARD 193 340 SANDSTONE YEL/W HARD 340 418 - SHALE GRAY MEDIUM 418 422 Screen N Open Hole From 281 ft.to 422 ft. Make Type Static Water Level 125 it.from Land surface Date 2002/12/30 PUMPING LEVEL(below land surface) 152 ft. alter 8 hrs. pumping 1200 g.p,m. Well Head Completion Pittess adapter mfr Model 1 Casing Protection �V] 12 in.above grade { At-grade(Environmental Wells and Borings ONLY) Grouting Information Well grouted? 91 Yes ❑ No Material From To(ft.) Amount(yds/bags) I G 0 281 32.5 Y I ' ( Nearest Known Source of Contamination Il 200 ft. direction N type SDF Well disinfected upon completion? Lv] Yes ❑ No Pump d' Not Installed Date Installed N Mfr name Model HP Volts I Drop Pipe Length ft. Capacity g.p.m 111 Type Any not in use and not sealed well(s)on property? ❑ Yes W No # Was a variance granted from the MDH for this Well? ❑ Yes d❑No USGS Quad Lake Elmo Elevation .997 - ---- — - Aquifer: OPCJ Alt Id: 61-1031 Well CONTRACTOR CERTIFICATION Lic.Or Reg.No. 62012 License Business Name Report.Copy Name of Driller ALLEN,J. HE-01205-06(Rev.9/96) APPENDIX J l4 CITY OF Building Department Informational Handout LAKE Published 9/14/07 E L M O Updated 4/24/08 3800 Laverne Avenue N City Hall: (651) 777-5510 Lake Elmo, MN 55042 Building Inspections: (651)233-5405 Planning Department: (651) 233-5413 Fax: (651) 777-9615 Electrical Inspector: (612) 866-3784 NEW HOME CONSTRUCTION — SINGLE FAMILY 1 A building permit is required for all new home construction. A PPLICA TION PROCESS OVERVIEW I The building permit application process for new homes in most cases is a three step i process, The first step entails submitting a complete building permit application to demonstrate the proposal meets all zoning and building code regulations. The second ' step is completion of an as-built grading survey to show your final structure was built as permitted. The final step, provided everything was completed per plan, is issuance of a certificate of occupancy. All permits must be submitted by the responsible contractor and be approved prior to any work beginning. State and local licensing requirements apply. STEP 1: APPLICATION To ensure that you receive a building permit in a timely manner, be sure to submit a complete application providing all required information, We would also recommend that you submit your application a minimum of two weeks prior to your desired start date. If you have any questions or concerns about what must be submitted, please contact the I planning department at Lake Elmo City Hall. Unless authorized by the City, all applications shall include the following: • One (1)completed and signed building permit application provided by the City of Lake Elmo. If the application form is downloaded off the website, two copies shall I ' be provided. l ' • Three(3) to-scale copies of a Certificate of Survey/Grading & drainage site plan(s). The certificate of survey must include the following: o All property lines and easements o Delineated wetlands and tree o All proposed structures with preservation areas setbacks shown from nearest o Trees with elevation shots property line(s) o Driveway location and width o Proposed 2-foot contours o Garage floor, low floor, and low o Existing 2-foot contours opening elevations Lake Elmo Building Department Informational Handout—New Home Construction—Single Family I 1J 't o House type (will be compared to . the approved subdivision plan)* o Lawn sprinkler system* o Top of curb elevations o Impervious surface calculations o Proposed retaining walls` broken down as follows: L (including height) - Total square footage of the o Emergency Overflow(EOF) primary structure and elevations* driveway o Ordinary High Water Level - Total square footage of all (OHWL)elevations* additional impervious [ o Public utility locations(storm surfaces sewer, sanitary sewer, - Combined total of all watermain, etc.) impervious surfaces o Calculation of total lot area(sq o Any additional information _ ft) . requested by the City Engineer o Erosion control measures (trenched-in silt fence along a]I peripheries of disturbed site) *Some items may not be applicable for some lots. t i. � Two (2) copies of the building construction plans with all specifications including: o Energy Code compliance worksheet(MN Check, appliance & ventilation E_ . requirements information) o Window Manufacturer (Fenestration ratings) " o Window, Door and Skylight Schedule L o Exterior Lighting.Plan o Roof truss design certification specs o Floor truss design certification specs ; o Foundation engineering design or specification information for compliance with MSBC 1305.2109 o Foundation drainage system design per M.S.B,C. 1305.2109 o On site sewage treatment system location including primary and secondary location(if applicable) o On site potable well Iocation (if applicable) The following information may be submitted separate from the building construction plan information above. o Plumbing permit application submitted by licensed plumbing contractor through the State of Minnesota. o Heating Ventilating & Air Conditioning permit submitted by licensed city contractor. o Electrical permit submitted to the State Board of Electricity. F The above submittals constitute a cam fete application for a building p pp ding permit to construct a new single-family dwelling (Minnesota State Building Code 1300,0130). It will typically take two weeks to approve your application, so please plan accordingly. Lake Elmo Building Department Informational Handout--New Home Construction—Single Family 2 , i j I i Submitting an incomplete application will delay the process. You will be asked to pick up the permit once it has been reviewed and approved by the City. Upon payment of i the application fee, the permit can be issued. NOTICE—Before construction begins, the following items must be in place on the lot: I - Required Erosion control - Portable Toilets(per MN Health Department) - Driveway base (IE: Crushed Rock) - Dumpster STEP 2. AS-BUILT SURVEY Before receiving a Certificate of Occupancy, the contractor shall submit an as-built survey which must include the following: o As-built 2-foot contours o Emergency Overflow(EOF) o Proposed 2-foot contours elevations o Sufficient spot elevations to o High Water Level (HWL) justify as-built contours elevations ' o Iron monuments placed in each o Public utilities (storm sewer, lot corner sanitary sewer, watermain, etc.) o As-built house location . o Impervious surface w/setbacks shown from property calculations broken down as line at nearest point follows: o All property lines.and easements - Total square footage of the o Delineated wetlands and tree primary structure and preservation areas driveway o As-built and proposed garage - Total square footage of all floor, low floor, and low opening additional impervious elevations surfaces o House type - Combined total of all f o Top of curb elevations impervious surfaces o As-built driveway location and o Trees with elevation shots width at property line o Any additional information o As-built retaining walls requested by the City Engineer (indicating height) o Location of onsite septic area primary and back-up site 1 The City shall be provided with engineering by the builder for retaining walls of 4 ft. or more prior to the issuance Certificate of Occupancy. This survey shall be submitted to City Hall prior to sodding or seeding in case any adjustments are required. I Lake Elmo Building Department informational Handout—New Home Construction—Single Family 3 �f i (B) Methods used to analyze flood hazards. This chapter is based upon a reasonable method of analyzing flood hazards which is consistent with the standards established by the Minnesota Department of Natural Resources. (t997 Code, § 305.02) § 152.03 SHORT TITLE. The provisions of this section shall be referred to as the "Flood Plain Regulation." += (1997 Code, § 305.03) § 152.04 PURPOSE. It is the purpose of this chapter to promote the public health, safety, and general welfare and to minimize those losses described in § 152.02 by provisions contained in this chapter. ,. (1997 Code, § 305.04) �- § 152.05 GENERALLY. l.._ (A) Application. This chapter shall apply to all lands within the jurisdiction of the city , shown on the city's flood boundary and floodway map and the flood insurance rate map dated 7-2-1979 (hereinafter "official maps") as being located within the boundaries of the floodway, flood fringe, or general flood plain districts. These official maps are adopted by reference and declared to be a part of this chapter. L . (B) Regulatory flood protection elevation. The regulatory flood protection elevation shall be an elevation no lower than 1 foot above the elevation of the regional flood plus any increases in flood elevation caused by encroachments on the flood'plain that result from designation of a floodway. (C) Interpretation. (1) In their interpretation and application, the provisions of this chapter shall be held to be minimum requirements and shall be liberally construed in favor of the city and shall not be deemed a limitation or repeal of any other powers granted by state statutes. (2) Where interpretation is needed as to exact location of the boundary of the flood , plain district as shown on the official maps, as for example where there appears to be a conflict L between a mapped boundary and actual field conditions. and there is a formal appeal of the decision of the Zoning Administrator, the Board of Adjustment shall make the necessary interpretation. All decisions will be based on elevations on the regional (100-year) flood profile and other available technical data. Persons contesting the location of the district boundaries shall be.given a reasonable opportunity to present their case to the board and to submit technical evidence. _ (3) Permitted and conditional uses allowed in the flood plain shall be limited to those only listed in § 152.08, and only under the standards and conditions which are also stated in this chapter. Where it is alleged that there is an error in any order, requirement, decision, or determination made by the Zoning Administrator, an appeal may be made to the Board of Adjustment and Appeals who follow the rules and procedures of§ 152.10 in making their final , decision. savedtext[1].rtf -2/11- 11 February 2009 5 i I (D) Abrogation and greater restriction. The provisions of this chapter are not intended to repeal,abrogate,or impair any existing easements, covenants,or deed restrictions. Where this chapter imposes greater restrictions, the provisions of this chapter shall prevail. All other ordinances inconsistent with this chapter are repealed to the extent of the inconsistency only. (E) Warning and disclaimer of liability. This chapter does not imply that areas outside the flood plain districts or land uses permitted within the districts will be free from flooding or flood damages. This chapter shall not create liability on the part of the city or any officer or employee of the city for any flood damages that result from reliance on this chapter or any administrative decision lawfully made under this chapter. ' 1997 Code § 305.05 § 162.06 ESTABLISHMENT OF FLOOD PLAIN DISTRICT. (A) Designation of the flood plain district. The flood insurance study for the city prepared by F.E.M.A. and dated January 1979 and the flood boundary and floodway map and flood insurance rate map, both dated 7-2-1979 (referred to as the 'official maps"), contained in the flood insurance study for the city are adopted by reference and declared to be part of this chapter. The flood insurance study shall be on file in the office of the Clerk. The flood plain district for the city shall include those areas which lie within the 100-year flood boundary on the flood insurance rate map dated 7-2-1979. (B) Compliance. No new structure or Iand shall hereafter be used and no structure shall be located, extended, converted, or structurally altered without full compliance with the terms of the flood plain regulation and other applicable regulations which apply to uses within the jurisdiction of the flood plain regulation. In addition, a caution is provided here that: (1) Modifications, additions, structural alterations, or repair after damage to existing nonconforming structures and non-conforming uses of structures or land are regulated by the general provisions of the flood plain regulation and.specifically § 152.12; and (2) (a) As-built elevations for elevated or flood-proofed structures must be certified by a registered professional engineer or architect as specified in the general provisions of the flood plain regulation and specifically as stated in § 152.09. (b) See following sketch. 1997 Code, § 305.07 Penalty, see 5 10.99 § 152.07 FLOOD PLAIN DISTRICT. (A) Permitted uses. The following uses have a low flood damage potential and do not obstruct flood flows. These uses shall be permitted to the extent that they are not prohibited by any other ordinance and provided they do not require structures, fill, or storage of materials or equipment. In addition, no use shall adversely affect the capacity of the channels or floodways or any tributary to the main stream or of any drainage ditch, or any other drainage facility or system. (1) Agricultural uses such as general farming, pasture, grazing, outdoor plant nurseries, horticulture,truck farming,forestry, sod farming,and wild crop harvesting; savedtext[I I.rtf -3/1 L- 11 February2009 y STEP 3: CERTIFICATE OF OCCUPANCY Upon approval of the as-built grading survey and a final inspection by the building inspector, a Certificate of Occupancy (CO) for the home can be issued. Please note that between the dates of June I"to November I", TEMPORARY CO'S WILL NOT BE ISSUED UNLESS ALL GRADING ISSUES HAVE BEEN ADDRESSED AND THE FINAL GRADING IS ACCEPTED BY THE CITY. Please plan all closings and move in dates accordingly as there will be no exceptions. OTHER BUILDING PERMIT ISSUES TO BEAWARE OF... o DESIGN STANDARDS/HOURS OF OPERATION - Driveway widths shall provide adequate egress and ingress to the site with a maximum width of 22 feet in residential districts, except in the Residential Estates (RE) zoning district which has a maximum of 12 feet at a lot line and 18 feet at the public street. The minimum distance between curbs of driveways at right-of-way line shall be 10 feet in any residential district. No driveway or curb cut shall be less than twenty feet from any right-of-way line of any street intersection. A driveway must be at least five feet from any side lot lines,except that in the RE zoning district, a driveway must be at least ten feet from any side lot lines. - Lighting—Exterior Lighting Ordinance Enforced - Exterior Lighting Plan Construction hours--No construction equipment shall be operated between the hours of 6:00 PM to 7:00 AM on weekdays and during any hours on Saturday, Sundays, and state and federal holidays. o FEES - An Erosion Control and Street Cleaning Escrow in the amount of$1,500 must accompany the Building Permit fees. - The building permit fee is based upon the valuation of the project. o OTHER - If the entire lot is not permanently surfaced with finished grades at the time of closing, customers should be advised regarding the transfer of responsibility for erosion control. The contractor's escrow will not be released in those cases unless the homeowner has replaced it in a like amount. - If a site comes into non-compliance with the Erosion Control Plan,the builder and/or site owner shall be notified and given 48 hours to bring the site back into compliance. If upon re-inspection (at the expense of the site builder or owner)the site is still non-compliant, the Building Official may employ a Lake Elmo Building Department Informational Handout—New Home Construction—Single Family 4 i I contractor or contractors,to undertake erosion control correction which would be charged to the Erosion Control and Road Escrow Account. - All site vegetation shall be re-established within 6 months of the date of the Certificate of Occupancy. - A handout is available at City Hall regarding steps to prevent the spread of Oak Wilt. This is available at City Hall by request. 1 I 1 I l 1 I J i ; Lake Elmo Building Department Informational Handout—New Home Construction—Single Family 5 Y APPENDIX K I Lake Elmo, MN Code of Ordinances TITLE XV: LAND USAGE CHAPTER 152: FLOOD PLAIN MANAGEMENT CHAPTER 152: FLOOD PLAIN MANAGEMENT r Section 152.01 Statutory authorization 152.02 Findings of fact 152.03 Short title 152.04 Purpose 152.05 Generally 152.06 Establishment of flood plain district 152.07 Flood plain district 152.08 Public utilities,railroads, and bridges 152.09 Administration 152.10 Board of Adjustment and Appeals 152.11 Conditional uses; standards of evaluation procedures 152.12 Non-conforming uses I � 152.13 Violations 152.14 Amendments 1 § 152.01 STATUTORY AUTHORIZATION. The legislature of the State of Minnesota has, in M.S. Ch. 103F and 462.357, as they may be ( amended from time to time, delegated the responsibility to local government units to adopt regulations designed to minimize flood losses. (1997 Code, § 305.01) § 152.02 FINDINGS OF FACT. (A) Flood hazard areas. The flood hazard areas of the city are subject to periodic inundation which results in potential loss of life, loss of property, health and safety hazards, disruption of conulierce and governmental services, extraordinary public expenditures for flood protection and relief, and impairment of the tax base, all of which adversely affect the public health, safety, and general welfare. I savedtext[I I.rtf - l/11- 11 February 2009 (B) Methods used to analyze flood hazards. This chapter is based upon a reasonable method of analyzing flood hazards which is consistent with the standards established by the Minnesota Department of Natural Resources. (1997 Code, § 305.02) § 152.03 SHORT TITLE. 1 The provisions of this section shall be referred to as the "Flood Plain Regulation." (1997 Code, § 305.03) ' t. § 152.04 PURPOSE. It is the purpose of this chapter to promote the public health, safety, and general welfare and to minimize those losses described in § 152.02 by provisions contained in this chapter. t.. (1997 Code, § 305.04) § 152.05 GENERALLY. (A) Application. This chapter shall apply to all lands within the jurisdiction of the city shown on the city's flood boundary and floodway map and the flood insurance rate map dated 7-2-1979 (hereinafter "official maps") as being located within the boundaries of the floodway, " flood fringe, or general flood plain districts. These official maps are adopted by reference and declared to be a part of this chapter. (B) Regulatory flood protection elevation. The regulatory flood protection elevation shall be an elevation no lower than 1 foot above the elevation of the regional flood plus any increases in flood elevation caused by encroachments on the flood plain that result from designation of a floodway. (C) Interpretation. .. (1) In their interpretation and application, the provisions of this chapter shall be held to be minimum requirements and shall be liberally construed in favor of the city and shall not be L deemed a limitation or repeal of any other powers granted by state statutes. (2) Where interpretation is needed as to exact location of the boundary of the flood F plain district as.shown on the official maps, as for example where there appears to be a conflict . between a mapped boundary and actual field conditions and there is a formal appeal of the decision of the Zoning Administrator, the Board of Adjustment shall make the necessary interpretation. All decisions will be based on elevations on the regional (100-year) flood profile and other available technical data. Persons contesting the location of the district boundaries shall be given a reasonable opportunity to present their case to the board and to submit technical evidence. (3) Permitted and conditional uses allowed in the flood plain shall be limited to those only listed in § 152.08, and only under the standards and conditions which are also stated in this chapter. Where it is alleged that there is an error in any order, requirement, decision, or determination made by the Zoning Administrator, an appeal may be. made to the Board of Adjustment and Appeals who follow the rules and procedures of§ 152.10 in making their final decision. savedtext[I J,rtf -2/11- II February2009 (D) Abrogation and greater restriction. The provisions of this chapter are not intended to repeal, abrogate, or impair any existing easements, covenants, or deed restrictions. Where this chapter imposes greater restrictions, the provisions of this chapter shall prevail. All other ordinances inconsistent with this chapter are repealed to the extent of the inconsistency only. (E) Warning and disclaimer of liability. This chapter does not imply that areas outside the flood plain districts or land uses permitted within the districts will be free from flooding or flood damages. This chapter shall not create liability on the part of the city or any officer or employee of the city for any flood damages that result from reliance on this chapter' or any administrative decision lawfully made under this chapter. (1997 Code, § 305.05) § 152.06 ESTABLISHMENT OF FLOOD PLAIN DISTRICT. (A) Designation of the flood plain district. The flood insurance study for the city prepared by F.E.M.A. and dated January 1979 and the flood boundary and floodway map and flood insurance rate map, both dated 7-2-1979 (referred to as the "official maps"),'contained in the flood insurance study for the city are adopted by reference and declared to be part of this chapter. The flood insurance study shall be on file in the office of the Clerk. The flood plain district for the city shall include those areas which lie within the 100-year flood boundary on the flood insurance rate map dated 7-2-1979. (B) Compliance. No new structure or land shall hereafter be used and no structure shall be located, extended, converted, or structurally altered without full compliance with the terms of the flood plain regulation and other applicable regulations which apply to uses within the jurisdiction of the flood plain regulation. In addition, a caution is provided here that: (1) Modifications, additions, structural alterations, or repair after damage to existing nonconforming structures and non-conforming uses of structures or land are regulated by the general provisions of the flood plain regulation and specifically § 152.12; and (2) (a) As-built elevations for elevated or flood-proofed structures must be certified by a registered professional engineer or architect as specified in the general provisions of the flood plain regulation and specifically as stated in § 152.09, (b) See following sketch. (1997 Code, § 305.07) Penalty, see \� 10.1)1) § 152.07 FLOOD PLAIN DISTRICT. (A) Permitted uses. The following uses have a low flood damage potential and do not obstruct flood flows. These uses shall be permitted to the extent that they are not prohibited by any other ordinance and provided they do not require structures, fill, or storage of materials or equipment. In addition, no use shall adversely affect the capacity of the channels or floodways or any tributary to the main stream or of any drainage ditch, or any other drainage facility or system. (1) Agricultural uses such as general farming, pasture, grazing, outdoor plant nurseries,horticulture, truck fanning, forestry, sod farming, and wild crop harvesting; I , savedtext[llAf -3/1 l- 11 Febmary 2009 i (2) Private and public recreational uses such as golf courses, tennis courts, golf driving ranges, archery ranges, picnic grounds, boat launching ramps, swimming areas, parks, wildlife and nature preserves, hunting and fishing areas, and single or multiple purpose recreational trails; and (3) Residential uses such as lawns, gardens, parking areas, and play areas. (B) Standards for flood plain perraiitted ttses. i (1) The use shall have a low flood damage susceptibility. (2) The use shall be permissible in the underlying zoning district. (3) The use shall not obstruct flood flows or increase flood elevations and shall not involve structures,fill, obstructions, excavations, or storage of materials or equipment. 1. (4) New or replacement on-site sewage treatment systems must be designed to eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters, and they shall not be subject to impairment or contamination during times of. flooding. Any sewage treatment system designed in accordance with the city's and state's i- current statewide standards whichever is more restrictive for on-site sewage treatment systems f� shall be determined to be in compliance with this chapter. (C) Conditional uses. (1) Railroads, bridges,utility transmission lines, and pipelines; l (2) Structural works for flood control such as levees, dikes, and flood walls constructed to any height where the intent is to protect individual structures and levees or dikes where the intent is to protect agricultural crops for a frequency flood event equal to or less than the 10-year frequency flood event; and (3) Alterations and/or additions to existing principal structures located in the flood fringe portion of the flood plain district which are elevated on fill so that the lowest floor including basement floor is at or above the regulatory flood protection elevation. The finished r fill elevation for structures shall be no lower than the regulatory flood protection elevation and the fill shall extend at the elevation at least 15 feet beyond the outside limits of the structure erected on the flood plain district. The construction must comply with the requirements of division(D)below. (D) Standards for flood plain conditional uses. (1) No structure (temporary or permanent), fill (including fill for roads and levees), , deposit, obstruction, storage of materials or 'equipment, or other uses may be allowed as a conditional use that*will cause any increase in the stage of the (100-year) regional flood or cause an increase in flood damages in the reach or reaches affected. L L (2) All flood plain conditional uses shall be subject to the procedures and standards contained in § 152.12. (3) The conditional use shall be permissible in the underlying zoning district. (4) Structural works for flood control that will change the course, current, or cross-section of protected wetlands or public waters shall'be subject to the provisions of M.S. savedtext[1].rtf -4/I t- 11 February 2009 { Ch. 103G, as it may be amended from time to time. Community-wide structural works for flood control intended to remove areas from the regulatory flood plain shall not be allowed in the floodway. (5) When at any 1 time more than 1,000 cubic yards of fill or other similar material is located on a parcel for the activities as on-site storage, landscaping, sand and gravel operations, roads, dredge spoil disposal, or construction of flood control works, an erosion/sedimentation control plan must be submitted. The plan must be prepared and certified by a registered professional engineer. (E) Standards for all flood plain uses. (1) All new principal structures must have vehicular access at or above the regulatory flood protection elevation. If a variance to this requirement is granted, the Board of Adjustment must specify limitations on the period of use or occupancy of the structure for times of flooding. (2) Accessory land uses, such as yards, railroad tracks, and parking lots, may be at elevations lower than the regulatory flood protection elevation. A permit for the facilities to be used by the employees or the general public shall not be granted in the absence of a flood warning system that provides adequate time for evacuation if the area would be inundated to a ( ' depth greater than 4 feet per second upon occurrence of the regional flood. (3) Fill shall be properly compacted and the slopes shall be properly protected by the use of rip-rap, vegetative cover, or other acceptable method. The Federal Emergency I Management Agency (F.E.M.A.) has established criteria for removing the specific flood hazard area designation for certain structures properly elevated on fill above the 100-year flood elevation; F.E.M.A.'s requirements incorporate specific fill compaction and side slope protection standards for multi-structure or multi-lot developments. These standards should be investigated prior-to the initiation of site preparation if a change of special flood hazard area designation will be requested. (4) Flood plain developments shall not adversely affect the.hydraulic capacity of the channel and adjoining flood plain of any tributary water course or drainage system where a .! floodway or other encroachment limit has not been specified on the official zoning map. (5) All dwelling units must be at least 20 feet wide through the main living*area of the structure. The structure must have continuous frost footings. Continuous frost footings are not required for porches, decks, and other appendages so long as proper post type footings per existing building codes are constructed. (6) Travel trailers, travel vehicles, and manufactured homes are prohibited in the flood plain district. (1997 Code, § 305,08) Penalty. see; § 10.99 r § 152.08 PUBLIC UTILITIES, RAILROADS, AND BRIDGES. (A) Public utilities. All public utilities and facilities such as gas, electrical, sewer, and water supply systems to be located in the flood plain shall be flood-proofed in accordance with i the State Building Code or elevated to above the regulatory flood protection elevation. (B) Public transportation facilities. Railroad tracks and bridges to be located within the savedtext[1].rtf -5/1[- l l February 2009 flood plain shall comply with § 152.07. Elevation to the regulatory flood protection elevation shall be provided where failure or interruption of these transportation facilities would result in danger to the public health or safety or where the facilities are essential to the orderly functioning of the area. Limited access roads or railroads may be constructed at a lower elevation where t _ failure or interruption of transportation services would not endanger the public health or safety. (C) On-site sewage treatment and rater supply systems. Where public utilities are not provided, on-site water supply systems must be designed to eliminate infiltration of flood waters into the systems, and new or replacement on-site sewage treatment systems must be designed to eliminate infiltration of flood waters into the systems and discharges from the systems into flood j waters and they shall not be subject to impairment or contamination during times of flooding. Any sewage treatment system designed in accordance with the city's and state's current statewide standards, whichever is more restrictive for on-site sewage treatment systems, shall be determined to be in compliance with this chapter. (1997 Code, § 305.09) Penalty. see �, 10.99 § 152.09 ADMINISTRATION. (A) Zoning Administrator. The Zoning Administrator or other official designated by the r city shall administer and enforce the flood plain regulation. If the Zoning Administrator finds a L_. violation of the provisions of the flood plain regulation, the Zoning Administrator shall notify the person responsible for the violation in accordance with the procedures stated in § 152.12. " (B) Permit requirements. A permit issued by the Zoning Administrator in conformity with the provisions of the flood plain regulation shall be secured prior to the erection, addition, or alteration of any building, structure, or portion of any building or structure; prior to the use or change of use of a building, structure, or land; prior to the change or extension of a non-conforming use; and prior to the placement of fill, excavation of materials, or the storage of 1 materials or equipment within the flood plain. (C) Application for permit. Application for a permit shall be made in duplicate to the Zoning Administrator on forms furnished by the Zoning Administrator and shall include the following where applicable! plans in duplicate drawn to scale, showing the nature, location, dimensions, and elevations of the lot; existing or proposed structures, fill, or storage of materials; and the location of the foregoing in relation to the flood plain.. (D) State and federal permits. Prior to granting a permit or processing an application for a conditional use permit or variance, the Zoning Administrator shall determine that the applicant f' has obtained all necessary state and federal permits. (E) Certificate of occupancy for a new, altered, or non-conforming use. It shall be unlawful to use, occupy, or permit the use or occupancy of any building or premises or part of the building or premises subsequently created, erected, changed, converted, altered, or enlarged in its use or structure until a certificate of occupancy shall have been issued by the Zoning Administrator indicating that the use of the building or land conforms to the requirements of the flood plain regulation. (F) Construction and use to be as provided on applications, plans, permits, variances, and certificates of occupancy. Permits, :conditional use permits, or certificates of occupancy .: savedtext[1].rtf -b/11- 11 February 2009 I issued on the basis of approved plans and applications authorize only the use, arrangement, and construction set forth in the approved plans and applications, and no other use, arrangement, or construction. Any use, arrangement, or construction at variance with that authorized shall be deemed a violation of the flood plain regulation, and punishable as provided by § 152.13. (G) Certification. The applicant shall be required to submit certification by a registered I professional engineer, registered architect, or registered land surveyor that the finished fill and I building elevations were accomplished in compliance with the provisions of this chapter. Flood-proofing measures shall be certified by a registered professional engineer or registered architect. (H) Record of first floor elevation. The Zoning Administrator shall maintain a record of the elevation of the lowest floor (including basement) of all new structures and alterations or [ additions to existing structures in the flood plain. The Zoning Administrator shall also maintain a record of the elevation to which structures or alterations and additions to structures are flood-proofed. (T) Subdivisions. No land shall be subdivided which is unsuitable for the reason of flooding, inadequate drainage, water supply, or sewage treatment facilities. All lots within the 1 flood plain districts shall contain a building site at or above the regulatory flood protection elevation. All subdivisions shall have water and sewage treatment facilities that comply with the provisions of the flood plain regulation and have road access both to the subdivision and to the individual building sites no lower than the regulatory flood protection elevation. For all subdivisions in the flood plain, the floodway and flood fringe boundaries, the regulatory flood protection elevation and the required elevation of all access roads shall be clearly labeled on all required subdivision drawings and platting documents. For all residential structures in the flood plain;..'-the-floodway and the flood fringe boundaries, the basement construction, or the lowest flood, if there is no basement, shall not be allowed below the regulatory flood protection elevation. (1997 Code, § 305.10) Penalty, see § 10.99 1 § 152.10 BOARD OF ADJUSTMENT AND APPEALS. (A) Rules. The Board of Adjustment and Appeals shall have rules and power conferred I in the zoning code. { (B) Hearings. The Board of Adjustment shall follow the hearing procedures of the zoning code. The Board of Adjustments and Appealsshall submit by mail to the Commissioner f of Natural Resources a copy of the application for proposed variances sufficiently in advance so that the Commissioner will receive at least 10-days notice of the hearing. (C) Decisions. (1) A Board decision and their findings shall be made according to the zoning code. In granting a variance, the Board may prescribe appropriate conditions and safeguards which are in conformity with the purposes of the flood plain regulation. Violations of the conditions and safeguards, when made a part of the terms under which the variance is granted, shall be deemed a violation of the flood plain regulation punishable under § 152.13. No variance shall allow in any district a use prohibited in that.district or permit a lower degree of savedtext[I].rtf -7/11- 11 February 2009 i i i flood protection than the regulatory flood protection elevation. Variances may be used to modify pennissible methods of flood protection. (2) A copy of all decisions granting variances shall be forwarded by mail to the. Commissioner of Natural Resources within 10 days of the action. . (3) Appeals from any decision of the Board of Adjustments and Appeals may be made in accordance with and as specified in the zoning code. (D) Flood insurance notice and record keeping. The Zoning Administrator shall notify the applicant for a variance that: (1) The issuance of a variance to construct a structure below the base flood level will result in increased premium rates for flood insurance up to amounts as high as $25 for $100 of insurance coverage; and (2) The construction below the 100-year or regional flood level increases risks to life and property. The notification shall be maintained with a record of all variance actions. The i city shall maintain a record of all variance actions, including justification for their issuance, and - report the variances issued in its annual or biennial report submitted to the administrator of the National Flood Insurance Program. (1997 Code, § 305.11) § 152.11 CONDITIONAL USES; STANDARDS OF EVALUATION PROCEDURES. (A) Rules and hearings. r •. (1) A conditional use permit application shall be acted upon according to the procedures outlined in division(D) below. ' (2) Upon filing with the city an application for a conditional use permit, the Council '-' shall submit by mail to the Commissioner. of Natural Resources a copy of the application for ; proposed conditional use sufficiently in advance so that the Commissioner will receive at least 10-days notice of the hearing. (B) Procedures to be followed by the city in passing on conditional use permit applications within the flood plain district. The applicant is required to furnish the following information and additional information as deemed necessary by the Council for determining the suitability of the particular site for the proposed use: (1) Plans drawn to scale showing the nature, location, dimensions, and elevation of the lot, existing or proposed structures,.fill, storage of materials, flood-proofing measures, and the relationship of the above to the location of the stream channel; (2) . Specifications for building construction and materials, flood-proofing, filling, dredging, grading, channel improvement, storage of materials water supply, and sanitary g g� g g� P g � Y facilities; }- (3) Transmit 1 copy of the information described above to a designated engineer or other expert person or agency for technical assistance, where necessary, in evaluating the proposed project in relation to flood heights and velocities, the seriousness of flood damage to the use, the adequacy of the plans for protection,and other technical matters; and savedtext[I].rtf -$/ll- 11 February2009 f f (4) Based upon the technical evaluation of the designated engineer or expert, the Council shall determine the specific flood hazard at the site and evaluate the suitability of the proposed use in relation to the flood hazard. 1 (C) Factors upon which the decision of the Council shall be based lti passing upon conditional use applications, the city shall consider all relevant factors specified in other sections of the flood plain regulation, and: (1) The danger to life and property due to increased flood heights or velocities caused by encroacluuents; . (2) The danger that materials may be swept onto other lands or downstream to the injury of others or they may block bridges, culverts, or other hydraulic structures; 1 (3) The proposed water supply and sanitation systems and the ability of these systems to prevent disease,contamination, and unsanitary conditions; (4) The susceptibility of the proposed facility and its intents to flood damage and the effect of the damage on the individual owner; (5) The importance of the services provided by the proposed facility to the community; (6) The requirements of the facility for a water front location; (7) The availability of alternative locations not subject to flooding for the proposed use; (8) The compatibility of the proposed use with existing development and development anticipated in the foreseeable future; G (9) The relationship of the proposed use to the comprehensive plan and flood plain management program for the area; (10) The safety of access to the property in times of flood for ordinary and emergency vehicles; l (11) The expected heights, velocity, duration, rate of rise, and sediment transport of ( the flood waters expected at the site; and (12) The other factors which are relevant to the purposes of the flood plain regulation. I . (D) Conditions attached to conditional use permits. Upon consideration of the factors listed above and the purpose of this chapter, the city shall attach the conditions to the granting of conditional use he as it deems necessary to fulfill the purposes of the flood plain regulation. The conditions may include, but are not limited to,the following: (1) Modification of waste treatment and water supply facilities; (2) Limitations on period of use, occupancy, and operation; (3) Imposition of operational controls, sureties, and deed restrictions; l (4) Requirements for construction of channel modifications, compensatory storage of a 2 to 1 replacement or greater, dikes, levees, and other protective measures; and savedtext[1].rtf -9/11- 11 February 2009 (5) Flood-proofing measures, in accordance with the State Building Code and the flood plain regulation; the applicant shall submit a plan or document certified by a registered professional engineer or architect that the flood-proofing measures are consistent with the regulatory flood protection elevation and associated flood factors for the particular area. (1997 Code, § 305.12) § 152.12 NON-CONFORMING USES. (A) Continuance of non-conforming use. A structure or the use of a structure or premises which was lawful before the passage or amendment of the flood 'plain regulation but which is not in conformity with the provisions of the flood plain regulation may be continued subject to the ' - requirements of the zoning code. (B) Alterations;. additions. The cost of all structural alterations or additions both inside _. and outside of a structure to any non-conforming structure over the life of the structure shall not exceed 50% of the market value of the structure unless the conditions of this chapter are I" satisfied. The cost of all structural alterations and additions and additions constructed since the _ adoption of the eity's initial flood plain controls must be calculated into today's current cost which will include all costs such as construction materials and a reasonable cost placed on all ' manpower or labor. If the current cost of all previous and proposed alterations and additions exceeds 50% of the current market value of.the structure, then the structure must meet the standards of§ 152.07. ' (1997 Code, § 305.13) r: § 152.13 VIOLATIONS. (A) Violation;failure to comply. Violation of the provisions of the flood plain regulation or failure to comply with any of its requirements (including violations of conditions and safeguards established in connection with grants of variances or conditional uses) shall constitute ._, a misdemeanor and shall be punishable as defined by law. (B) - Prevention; remedy. Nothing contained in this chapter shall prevent the city from . taking other lawful action that is necessary to prevent or remedy any violation. Actions may ts. include but are not limited to: (1) In responding to a suspected ordinance violation, the Zoning Administrator and the city may utilize the full array of enforcement actions available to it including, but not limited to, prosecution and fines, injunctions, after-the-fact permits, orders for corrective measures or a request to the National Flood Insurance Program for denial of flood insurance availability to the guilty party. The city must act in good faith to enforce these official controls and to correct the flood plain regulation violations to the extent possible so as not to jeopardize its eligibility in the National Flood Insurance Program; (2) When the flood plain regulation violation is either discovered by or brought to the attention of the Zoning Administrator, the Zoning Administrator shall immediately investigate the situation and document the nature and extent of the violation of the official ` control. As soon as is reasonably possible, this information will be submitted to the appropriate Department of Natural Resources and Federal Emergency Management Agency regional office along with the city's plan of action to correct the violation to the degree possible; f savedtext[1 I.rtf - 10/l I- 11 February 2009 (3) The Zoning Administrator shall notify the suspected party of the requirements of the flood plain regulation and all other official controls and the nature and extent of the suspected violation of these controls. If the structure and/or use is under construction or development, the Zoning Administrator may order the construction or development immediately halted until a proper permit or approval is granted by the city, If the construction or development is already completed,then the Zoning Administrator may either: (a) Issue an order identifying the corrective actions that must be made within a specified time period to bring the use or structure into compliance with the official controls; or (b) Notify the responsible party to apply for an after-the-fact permit or development approval within a specified period of time not to exceed 30 days. 1 (4) If the responsible party does not appropriately respond to the Zoning 1 Administrator within the specified period of time, each additional day that lapses shall constitute an additional violation of the flood plain regulation and shall be prosecuted accordingly. Tile Zoning Administrator shall also, upon the lapse of the specified response period, notify the landowner to restore the land to the condition which existed prior to the violation of the flood plain regulation. (1997 Code, § 305.14) Penalty. see S 10.99 § 152.14 AMENDMENTS. (A) The flood plain designation on the official map shall not be removed from flood plain areas unless it can be shown that the designation is in error. Special exceptions to this rule may be permitted by the Commissioner of Natural Resources if the Commissioner detennines that, through other measures, lands are adequately protected for the intended use. (B).. All amendments to the flood plain regulation including amendments to the official zoning map must be submitted to and approved by the Commissioner of Natural Resources prior to adoption. Changes in the official zoning map must meet the Federal Emergency Management Agency's (F.E.M.A.) technical conditions and criteria and must receive prior F.E.M.A. approval before adoption. The Commissioner of Natural Resources must be given 10-days written notice of all hearings to consider an amendment to the flood plain regulation and the notice shall include a draft of the proposed amendment or technical study under consideration. (1997 Code, § 305.15) Disclaimer: This Code of Ordinances and/or any other documents that appear on this site may not reflect the most current legislation adopted by the Municipality.American Legal Publishing Corporation provides these documents for informational purposes only.These documents should not be relied upon as the definitive authority for local legislation.Additionally,the formatting and pagination of the posted documents varies from the formatting and pagination of the official copy.The official printed copy of a Code of Ordinances should be consulted prior to any action being taken. For further information regarding the official version of any of this Code of Ordinances or other documents posted on this site; please contact the Municipality directly or contact American Legal Publishing toll-free at 800-445-5588. ©2008 American Legal Publishing Corporation techsupnortanamle,aq l.com 1.800.445.5688. - savedtext[I].rtf - 11/l1- 11 February2009 i i i i i i r� r I APPENDIX L I I I ONE COMPANY (� many solutio►ts" Memo To: Matt Moore, South Washington Watershed District From: Suresh Hettiarachchi, PE Project: Conceptual Storage Layout in Lake Elmo, MN' Mike Johnson,PE cc: Date: 01/10/2008 Job No: • Lake Elmo Conceptual Storage Locations within the South Washington Watershed 14Ie, a pg District Introduction The area of the City of Lake Elmo that falls within the boundaries of the South Washington Watershed District is slated for development and significant land use changes as indicated in the f Metropolitan Council 2020 plans and evident by the present development trends in the region. The South Washington Watershed District (SWWD) is evaluating conceptual storage locations and volumes within the City of Lake Elmo as an ongoing effort towards watershed management and storm water control. Utilizing the Data and Model Management System (DMMS) created for the SWWD, HDR Engineering (HDR) evaluated three conceptual storage locations for overall effectiveness in storm water rate and volume control. This effort is a follow on to the work ' initiated in the Storm Water Modeling Report published in July of 2006. Storm runoff rate and volume is particularly sensitive to the type of land use and layout of the tributary drainage area. Typically, land use changes due to development, increase the percentage of impervious surface area within a drainage area,which increases the rate and volume of runoff. Hence, storage and other methods are needed to mitigate this change to prevent adverse impacts to downstream and surrounding parts of the main watershed. The storage locations and sizes developed during this effort is conceptual and is intended to serve as a guide to the level of storage that will be needed to handle the projected development. Analysis Figure 1 shows the watershed boundaries of the City of Lake Elmo that impact the SWWD. Figure 1 also shows the change in percent impervious and the change in Cate and volume of runoff based on the projected landuse. Also indicated are the conceptual storage locations which l were initially presented in the July 2006 report. The location, storage volumes, and layout have HOR Engineering,Inc. 701 Xenia Avenue South,suite 600 Phone(763)591.5400 Pape 1 of 6 Minneapolis,MN W16 Fax(753}591-503 wwwMina.com f i been further refined and additional modeling completed to evaluate the impacts of these storage basins. The hydrologic and hydraulic modeling was completed using the DMMS. The existing land use I and percent impervious values are based on the current aerial orthophotographs (USGS, 2006), while the ultimate conditions land use and percent impervious values are based on the 2020 landuse plan of the Metropolitan Council, Table I presents the geometric information of the conceptual storage basins (CSBs) considered. The existing and ultimate conditions flow rates indicate the level of effectiveness of the CSBs in managing the rate of flows within the subwatersheds. All three locations are modeled with the standard outlet design presented in Appendix A. It is important to note that possible grading and other changes that might occur during typical land development that tend to modify watershed boundaries are not included in the . present analysis. Table 1 Modeled Geometric Information of the Storage Basins Location Surface Area (Acres) Depth (ft) Effective Storage Volume (weft) Basin 7 3.8 10.5 15.5 Basin 8 2.5 11.2 10.4 Basin 9 1.2 10.6 6.0 There are 2 major crossings of storm water that flow from the City Lake Elmo south into the City of Woodbury. The primary crossing is at the N Frontage Road to Interstate 94, which is 96 inch culvert across the highway. The other is at the outlet to location 9, which is a 36 inch pipe, also across the highway. 4 HDR Engineering,Inc. 1701 Xenia Avenue South.Sulle 600 Phone(163)591.5400 Page 2 of 6 Wumpolis,MN 55416 Fox(163)591.640 www.bftx.com f as I1 I�7�y� Ultimate Conditions }� �?j� jI J Name: LEImPP.1. �f� j,J Waterslied•Area: 89 ac Impervious: 40.9% Runoff;Volume:_24.9 ac-ft I I ;lw -i:.�tf -✓f. Yr-i t Runoff Deptft: 3.3 in , 4 1t Ultimate Conditions Name: LEImPP1u Watorslied Area: 53 ac} Impervious 3317% Existing Conditions Runoff,Volumo 13 5 acft . „r�' I t r '�`,' 1 iI ', `% Name: EP4 1 Runoff Depth: 3.1 in Watorshod Area: 90 ace / Imporvious. 12:3,% Runoff Volumo';14:5 m ft Existing Runoff De th:.1:9 In Name.EP3'2 1 I - P Watershed Area: 58 is F A Impervious. 9.0% ?' :) r , 4 { f Y� Tj �`Ii . J i Runoff,Voluliie 8.1 ac ft �3 ., �' :� i - /' /� Runoff Depth.'1.7 1n 09 t t e+ \` 7 4L .T+aetttrF r ��; ,_.r V ti71 ti 1 f `'� •- LL\ f� I I f �i •1�:F+1Y.+�t ar'I tsi F .. 1'. >r3j sc.! f'!'�. 4•..r ... �_ • . . _ ! 1_t_ _ ~� --=� �� Ulhmste'Conditions FPak Flow=,I70 cfs:.� � a, • . .. �� !: Peak Flo•i p'2&'cfs(43 �s) J I Name LEImPP2 1 y< l)1 { / Watershed'Area: 61 ::(:, r%f / Impervious t2 0 o i"�•i AV) -I 1'/� Rilnoff Voliun,-.17.G. -ft Runoff Depth 3.5 it tta r \ = Legend �. \ �r y I:xisting,Conditions• Name EP2-5' r" Model Lodes - ) Watershed'Are s t oc Impervious i 9 G , Ultim stc Conditions Non-Storage LEImFP f ` Volunu Nanie I {; A Storage /!� f;unc f"li.pih: 1.r in Witorslied'Are::: s� --. 1 - •T V '� ✓ ImpoL.rvlous: 5G:•; ., Model Links / RunoffVOlume:30.3 ac i -- - -- ��- _ Pnnoff Deptli7• �.2 In � i�- Natural Channel f ExlstingCondltlon.. 8 r • .: P Overflow Route Name EP2;3 t �� -- Watershed l roa.187.ac P Pipe ,� �_( Impervlous ;19 5 .7iIs \' ' `' ''J E� Trapezoidal Channel rf I 1 r _ Runoff Voluni^ 17 r.:::-it / Runoff Del-h VN i Modeled Storage Curves Existing Storage Curves y tli I i IIII ( .� Conceptual Storage Curves �_ ' - ? 9 i.. ter• I, SubWatersheds 51, Pc kfI t5cf ` � E' ( , . ). �- _ c� � _ Conceptual Storage Site otv s _ -- - _ k •1' I - _ -- __ _f oal n� zo�r_i('1 cfa). _ __ �-s. -- Pc over 443,c peak flow 1II4�6 �►® Pe k Flovi=555 cfs'(705 cfs) - 0 150 300 600 Feet Peak Flow=Existing conditions peak flow rates Peak Flow=Ultimate conditions peak flow rate with conceptual South Washington Watershed District storage in place(peak flow rate without conceptual DRAFT N storage in place) Lake Ehno Storage Analysis All Model Results are for a 6.3-inch, 24-hour rain event with a SCS Type 11 Distribution Dcrtn Sources:200 6{/crshin C.'oto l Conrom " 2006 USGSAeriria!Phottoo m ra)hv Map Document:(N:\GISProj\SWWD\58355\map_docs\mxd\Maps\58355_LakeElmoStorageComparison mxd) 1/9/2008--3:26:24 PM