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HomeMy WebLinkAbout#14 - Upper 33rd Conditional Use PermitSTAFF REPORT DATE: 1/17/2023 REGULAR MOTION TO: City Council FROM: Sophia Jensen, City Planner AGENDA ITEM: Upper 33rd Street N Conditional Use Permit Request REVIEWED BY: Ben Hetzel, Prior City Planner INTRODUCTION: Henry Elgersma of Upper 33rd LLC recently submitted a conditional use permit application to construct a four unit townhome building at the properties described as Lots 10 and 11, Block 2, Subdivision of Lake Elmo Park. (PIDs 1302921320051 and 1302921320052). The Village Mixed Use Zoning District requires a conditional use permit for all new residential uses. The existing vacant lots are located along Upper 33rd Street N to the west of Lake Elmo Avenue N in the Old Village. The applicant has also submitted a lot consolidation application to combine lots 10 and 11. Administrative approval of a consolidation is required since the properties are existing platted lots. History Lot 11 was originally platted as lots 11, 12, and half of 13 in the early 1900s. Since the original platting, lots 11, 12, and half of 13 were consolidated into one lot, now known as lot 11. Lot 10 has remained untouched. ISSUE BEFORE CITY COUNCIL: The City Council is being asked to review and make a determination on the request for a conditional use permit to construct a four unit townhome building. REQUEST DETAILS/ANALYSIS: Applicants: Henry Elgersma Property Owner: Upper 33rd Street LLC Location: Lots 10 and 11, Block 2, Subdivision of Lake Elmo Park Request: Conditional Use Permit for a four unit townhome building. Site Area: 0.4 total acres Existing Land Use: Vacant Existing Zoning: Village Mixed Use (VMX) Surrounding: Rural Single Family – North, West, East Comprehensive Plan: Village Mixed Use (VMX) Deadline for Action: Application Complete – 11/8/22 60 Day Deadline – 1/8/23 Extension Letter – 12/21/22 120 Day Deadline – 3/8/23 2 Regulations: Article XIII Village Districts Article VIII Environmental Performance Standards Article VII, Section 105.12.420 Off-Street Parking Proposal The applicant is proposing a total of four units in the single family attached dwelling structure. All four units will be located on a contiguous lot surrounded by existing single family residential uses. The proposal has been updated to address public comments. The revised building is 1-1/2 stories and has a footprint of approximately 5,854 square feet with varying unit sizes. Each unit has a total of three bedrooms and a front side loaded garage. The provided landscape plan depicts a 6 foot privacy fence along the rear and side property lines along with trees and 3 foot tall gabions to provide screening from Upper 33rd Street N. Village Mixed-Use Zoning District Description This district is intended to continue the traditional mixed-use development that has occurred in the Old Village by allowing retail, service, office, civic and public uses as well as residential units. The mixture of land uses within the district is essential to establishing the level of vitality and intensity needed to support retail and service uses. Development within areas zoned VMX will occur at a density of 5 - 10 units per acre. Senior congregate care facilities may exceed this density maximum with a range not to exceed a total of 16 units per acre, provided the facility can satisfy all zoning and applicable conditional use permit review criteria. The placement of building edges and treatment of building, parking, landscaping, and pedestrian spaces is essential to creating the pedestrian friendly environment envisioned for the VMX district. Comprehensive Plan The subject property is located within the Old Village District of the Village Planning Area. The Old Village carries the nostalgic history and character of the City. In turn, vitality of the Old Village Main Street is dependent upon enough households supporting the existing businesses and desired businesses along Main Street. The 2040 Comprehensive Plan indicates that the future plan for the Old Village is to enhance and preserve the historic character of Main Street. 2040 Future Land Use Map (Pink w/ Dots is V-MX) Current Zoning Map (Red w/ Orange Dots is V-MX) 3 Density The total site area equals 0.4 acres. The allowable density within the Village Mixed-Use district is a range of 5-10 units per acre. This proposal would meet the minimum and maximum density with a calculation of 10 units per acre. VMX Lot Dimensions and Building Bulk Requirements Required Proposed Minimum Lot Area (Square Feet) 3,000 per unit 17,424 total Minimum Lot Width 25 ft per unit 175 ft total Max Impervious Coverage 75 percent 57.5 percent Front Yard Setback 25 ft 25 ft Rear Yard Setback 10 ft 25.8 ft Side Yard Setback 10 ft 32.3ft and 16.7 ft Driveway Setback (side lot line) 5 ft 5 ft Off-Street Parking Requirements The off-street parking requirements of the Lake Elmo City Code require one parking space per one bedroom unit and two spaces per two bedroom unit or larger for single-family attached dwellings. An additional ten percent of parking spaces shall also be required for visitor parking. The architectural plans show that the proposal will meet the bedroom parking space requirement by providing each residential unit an attached two car garage. The plans have been revised to incorporate onsite visitor parking. Development Standards Development of land within the village districts shall follow established standards for specific uses. The following standards apply to single family attached dwellings. a) The primary entrance to each unit shall be located on the facade fronting a public street. The proposal shows a primary entrance facing Upper 33rd Street N for each unit. b) Common open space for use by all residents or private open space adjacent to each other shall be provided. Such open space shall comprise of a minimum of 300 square feet in the V-HDR and VMX, and 500 square feet per unit in the V-MDR. The total amount of open space required for four units is 1,200 square feet. The provided site plan shows 2,724 square feet of open space. c) Unless otherwise specified in this article, single family attached dwellings in the VMX and V-MDR shall adhere to the MDR district setbacks. Article XIII Village Districts lists specific setbacks for the VMX district. The proposal meets the required setbacks of the VMX district. Stormwater Management A stormwater management plan has been submitted. The proposal includes an underground storm water infiltration chamber to mitigate 100% of the required rate and volume control. 4 REVIEW COMMENTS City Engineer (Memo dated 1/9/2023) 1. Final Construction Plans must be prepared in accordance with the Engineering and Design Standards Manual, dated January 2022. 2. No construction on the Project may begin until the applicant has received City Engineer approval for the Final Construction Plans; the applicant has obtained and submitted to the City all applicable permits, easements and permissions needed for the project; and a preconstruction meeting has been held by the City’s engineering department. All off‐site permanent or temporary construction easements required to construct the project must be shown on the plans and must be provided prior to scheduling a preconstruction meeting. 3. Upper 33rd Street N does not meet the minimum city standards for road width and right of way width. 4. No on street parking is allowed along Upper 33rd Street N. Parking must be kept internal to the site. 5. No sidewalk or trail currently exists along Upper 33rd Street due to the narrow roadway. 6. A 10-ft drainage and utility easement must be provided along the property frontage. Minimum lot easements should be included along the side and rear property lines as well. 7. Revise the existing conditions plan to show a minimum distance of 150 ft outside the property boundary in all directions. 8. Site grading must be revised to meet all city minimum and maximum allowable grades. 9. The grading plans must be revised, as may be required, to meet city design standards 10. The proposed site plan is subject to a storm water management plan (SWMP) meeting State, Valley Branch Watershed District (VBWD) and city rules. 11. In order to comply with VBWD and city rules, the applicant is requesting to divert stormwater runoff that currenting discharges north from the property, and to proposed southerly discharge location. This stormwater diversion has been found to be acceptable to the city. 12. The soils investigations performed on the site determined that infiltration is not feasible. Therefore, the developer intends to purchase credits from Lake Elmo’s Downtown Regional Infiltration Basin Volume Control credit bank to meet volume control requirements. 13. The storm water management facilities constructed for this development will be privately owned and maintained. The applicant will be required to execute and record a Stormwater Maintenance and Easement Agreement in the City’s standard form of agreement. The stormwater drainage and utility easements must be shown on the site plans, utility plans and grading plans. A Homeowner’s association would be required for the development to provide for the ongoing ownership and maintenance 14. Municipal water supply is available to the site. 15. Sanitary sewer service is available to the site. Fire Department (Memo dated 1/6/2023) 1. The fire sprinkler system shall be installed compliant with provisions of 2016 NFPA Standard 13D, Installation of Sprinkler Systems in One- and Two-Family Dwellings or IRC P2904. City permit required prior to initiation of work. 2. Building address numbers shall be plainly visible from the street fronting the property and shall be a contrasting color from the background. Size and placement of address numbers shall be approved by the fire and planning departments. 5 Landscape Architect (Memo dated (1/6/2023) 1. It is recommended that the landscape and tree preservation plans be approved on the condition that the planning schedule on L200 be amended to change the size of the Degroot’s Spire Arborvitaes to 6’ and that the sheets be signed by a professional prior to constriction. RECCOMMENDED CONDITIONAL USE FINDINGS Conditional use means a land use or development as defined by ordinance that would not be appropriate generally but may be allowed with appropriate restrictions as provided by official controls only upon a finding that all of the following provisions are met. Staff recommends the following findings: 1. The proposed use will not be detrimental to or endanger the public health, safety, comfort, convenience or general welfare of the neighborhood or the city. The proposed use will not endanger the public health, safety, comfort, convenience or general welfare of the neighborhood or the City. 2. The use or development conforms to the City of Lake Elmo Comprehensive Plan. The site is already zoned in conformance with the intent of the Old Village District of the Village Planning Area and the Village Mixed Use zoning district. 3. The use or development is compatible with the existing neighborhood. The proposed use is compatible with the existing single family residential in the neighborhood. The design of the proposed structure is consistent with the surrounding area in terms of building height, building materials, colors, and variations of pitched roofs. 4. The proposed use meets all specific development standards for such use listed in the Zoning Code. The use meets all the specific development standards for single family attached dwellings set forth in LEC 105.12.820(a)(3). 5. If the proposed use is in a flood plain management or shoreland area, the proposed use meets all the specific standards for such use listed in Article XIX (Shoreland Management) and Title 100 (Flood Plain Management). The proposed use is not within a Shoreland Management District or a Floodplain Management zone. 6. The proposed use will be designed, constructed, operated, and maintained so as to be compatible in appearance with the existing or intended character of the general vicinity and will not change the essential character of that area. The design of the proposed structure is designed to be compatible with the height, colors, and building materials of the surrounding area. 7. The proposed use will not be hazardous or create a nuisance as defined under this Chapter to existing or future neighboring structures. The use is not hazardous and will not create a nuisance. 8. The proposed use will be served adequately by essential public facilities and services, including streets, police and fire protection, drainage structures, refuse disposal, water and sewer systems and schools or will be served adequately by such facilities and services 6 provided by the persons or agencies responsible for the establishment of the proposed use. The proposed use will be served adequately by essential public facilities and services. 9.The proposed use will not create excessive additional requirements at public cost for public facilities and services and will not be detrimental to the economic welfare of the community. The proposed use will not create excessive additional requirements at a public cost. 10.The proposed use will not involve uses, activities, processes, materials, equipment, and conditions of operation that will be detrimental to any persons, property, or the general welfare because of excessive production of traffic, noise, smoke, fumes, glare, or odors. The proposed residential use will not produce excessive noise, fumes, glare, or odors. The addition of four dwelling units should not create excessive traffic along 33rd Street N especially with the restriction of on street parking. Any future expansion of 33rd Street N to the west will further improve traffic circulation. 11.Vehicular approaches to the property, where present, will not create traffic congestion or interfere with traffic on surrounding public thoroughfares. The proposed structure will not create traffic congestion or interfere with traffic on surrounding public thoroughfares. Four additional residential units should not create congestion. 12.The proposed use will not result in the destruction, loss, or damage of a natural or scenic feature of major importance. The use will not result in the destruction, loss, or damage of a natural or scenic feature of major importance. FISCAL IMPACT: None RECOMMENDED CONDITIONS OF APPROVAL: 1. The applicant must obtain all other necessary City, State, and other governing body permits and approvals prior to the commencement of any construction activity onsite. 2. All recommendations in the City Engineer’s memorandum dated 1/9/2023 shall be met prior to any construction activity. 3. All recommendations provided be the City’s Landscape Architect memorandum dated 1/6/2023 shall be met prior to any construction activity. 4. All conditions in the Fire Chief’s memorandum dated 1/6/22 must be met prior to any construction activity. 5. The applicant shall provide the City with recorded documents from Washington County which effectuate the required lot consolidation prior to any construction activity. 6. The applicant must receive an approved address from Washington County prior to any construction activity. 7. An encroachment agreement is required for fencing located in the required drainage and utility easements prior to any construction activity. A fence permit is also required regardless of the location of the fencing. 8.If the applicant has not taken action toward starting the townhouse structure or if substantial construction has not taken place within 12 months of the City’s approval of the conditional use 7 permit, the CUP approval shall become void. The applicant may request City Council approval of a time extension to start or implement the conditional use permit. PUBLIC COMMENT: A public hearing notice was sent to surrounding property owners on November 16, 2022 and published in the Stillwater Gazette on November 18, 2022. Public Comment is as follows, staff received one comment in favor and five in opposition of the project. Below are the public comments and how they have been addressed: Urban Coffee – 349 Lake Elmo Ave N – emailed their full support of this CUP. Jill Martin – 11002 Upper 33rd St N – provided comment to staff in opposition of the CUP. JoAnne Lawen – 11051 34th St N – is in opposition of the CUP due to community design and the existing density of the community. The applicant has revised the plans to reduce building height and create comparable architecture to the surrounding area. Density meets requirement. Elizabeth Everson – 11075 34th St N – posed the question regarding why the garages were in the back and who was going to be managing the property, is there a maximum capacity per unit and would pets be allowed. Applicant revised plans to bring garages to the front. Stated property would be managed by a third party. Capacity and pets are not a part of the CUP review process. Ann Bucheck – 2301 Legion Ave N – is in opposition of the CUP due to this building not conforming to the Comprehensive Plan in many aspects. The proposal meets the 2040 Comprehensive Plan requirements. Susan Dunn – 11018 Upper 33rd St N – is in opposition of the CUP due to parking, safety, water, impervious surface area, snow removal, building size. The applicant has moved the garages to the front and added visitor parking on site. The impervious surface has been reduced with smaller driveways and snow removal would follow suit with surrounding properties. The building size is compliant for the district. PLANNING COMMISION RECCOMENDATION: The Planning Commission voted to recommend approval of the proposed project at the 11-28- 2022 meeting Vote: 4-0. OPTIONS: The City Council may: • Approve the requests. • Approve of the requests with conditions. • Deny the requests, citing findings of fact for denial. RECOMMENDATION: Staff recommends that the City Council approve of the conditional use permit amendment to construct a four unit townhome building. “Motion to approve a conditional use permit to allow the construction of a four unit townhome building at the properties described as Lots 10 and 11, Block 2, Subdivision of Lake Elmo Park.” 8 ATTACHMENTS: 1) Resolution 2023-06 2) Planning Commission Minutes 11/28/2022 3) Land Use Application 4) Written Statements 5) Location Map 6) Civil Plans 7) Architectural Plans 8) Stormwater Management Plan 9) City Engineer Email dated 1/9/23 10) Fire Department Memo dated 1/6/23 11) Landscape Architect Memo dated 1/6/23 CITY OF LAKE ELMO WASHINGTON COUNTY STATE OF MINNESOTA RESOLUTION 2022-06 A RESOLUTION APPROVING A CONDITIONAL USE PERMIT FOR THE CONSTRUCTION OF A FOUR UNIT TOWNHOME WITH CONDITIONS AT LOTS 10 AND 11, BLOCK 2 SUBDIVISION LAKE ELMO PARK WHEREAS, the City of Lake Elmo is a municipal corporation organized and existing under the laws of the State of Minnesota; and WHEREAS, Henry Elgersma of Upper 33rd LLC (the "Applicant") has submitted an application to the City of Lake Elmo (the "City") for a Conditional Use Permit for the construction of a four unit townhome the property described as Lots 10 and 11, Block 2 of the Lake Elmo Park subdivision (PIDs 13.029.21.32.0051 and 13.029.21.32.0052) (the "Property"); and WHEREAS, the Lake Elmo Planning Commission held a public hearing on said matter on November 28th, 2022; and WHEREAS, the Lake Elmo Planning Commission has submitted its report and recommendation to the City Council as part of a Staff Memorandum dated January 17th 2023; and WHEREAS, the City Council considered said matter at its January 17th 2023 meeting; and NOW, THEREFORE, based on the testimony elicited and information received, the City Council makes the following: FINDINGS 1. The proposed use will not be detrimental to or endanger the public health, safety, comfort, convenience or general welfare of the neighborhood or the city. The proposed use will not endanger the public health, safety, comfort, convenience or general welfare of the neighborhood or the City. 2. The use or development conforms to the City of Lake Elmo Comprehensive Plan. The site is already zoned in conformance with the intent of the Old Village District of the Village Planning Area and the Village Mixed Use zoning district. 3. The use or development is compatible with the existing neighborhood. The proposed use is compatible with the existing single family residential in the neighborhood. The design of the proposed structure is consistent with the surrounding area in terms of building height, building materials, colors, and variations of pitched roofs. 4. The proposed use meets all specific development standards for such use listed in the Zoning Code. The use meets all the specific development standards for single family attached dwellings set forth in LEC 105.12.820(a)(3). 5. If the proposed use is in a flood plain management or shoreland area, the proposed use meets all the specific standards for such use listed in Article XIX (Shoreland Management) and Title 100 (Flood Plain Management). The proposed use is not within a Shoreland Management District or a Floodplain Management zone. 6.The proposed use will be designed, constructed, operated, and maintained so as to be compatible in appearance with the existing or intended character of the general vicinity and will not change the essential character of that area. The design of the proposed structure is designed to be compatible with the height, colors, and building materials of the surrounding area. 7.The proposed use will not be hazardous or create a nuisance as defined under this Chapter to existing or future neighboring structures. The use is not hazardous and will not create a nuisance. 8.The proposed use will be served adequately by essential public facilities and services, including streets, police and fire protection, drainage structures, refuse disposal, water and sewer systems and schools or will be served adequately by such facilities and services provided by the persons or agencies responsible for the establishment of the proposed use. The proposed use will be served adequately by essential public facilities and services. 9.The proposed use will not create excessive additional requirements at public cost for public facilities and services and will not be detrimental to the economic welfare of the community. The proposed use will not create excessive additional requirements at a public cost. 10.The proposed use will not involve uses, activities, processes, materials, equipment, and conditions of operation that will be detrimental to any persons, property, or the general welfare because of excessive production of traffic, noise, smoke, fumes, glare, or odors. The proposed residential use will not produce excessive noise, fumes, glare, or odors. The addition of four dwelling units should not create excessive traffic along 33rd Street N especially with the restriction of on street parking. Any future expansion of 33rd Street N to the west will further improve traffic circulation. 11.Vehicular approaches to the property, where present, will not create traffic congestion or interfere with traffic on surrounding public thoroughfares. The proposed structure will not create traffic congestion or interfere with traffic on surrounding public thoroughfares. Four additional residential units should not create congestion. 12.The proposed use will not result in the destruction, loss, or damage of a natural or scenic feature of major importance. The use will not result in the destruction, loss, or damage of a natural or scenic feature of major importance. DECISION NOW, THEREFORE, BE IT FURTHER RESOLVED, and based upon the information received and the above Findings, that the City Council of the City of Lake Elmo hereby approves the request by Henry Elgersma of Upper 33rd LLC for a Conditional Use Permit for the construction of a four unit townhome on the property located at Lots 10 and 11 Block 2 of the Lake Elmo Park Subdivision and grants the same, subject to the following conditions of approval: 1. The applicant must obtain all other necessary City, State, and other governing body permits and approvals prior to the commencement of any construction activity onsite. 2. All recommendations in the City Engineer’s memorandum dated 1/9/2023 shall be met prior to any construction activity. 3. All recommendations provided be the City’s Landscape Architect memorandum dated 1/6/2023 shall be met prior to any construction activity. 4. All conditions in the Fire Chief’s memorandum dated 1/6/22 must be met prior to any construction activity. 5. The applicant shall provide the City with recorded documents from Washington County which effectuate the required lot consolidation prior to any construction activity. 6. The applicant must receive an approved address from Washington County prior to any construction activity. 7. An encroachment agreement is required for fencing located in the required drainage and utility easements prior to any construction activity. A fence permit is also required regardless of the location of the fencing. 8. If the applicant has not taken action toward starting the townhouse structure or if substantial construction has not taken place within 12 months of the City’s approval of the conditional use permit, the CUP approval shall become void. The applicant may request City Council approval of a time extension to start or implement the conditional use permit. Passed and duly adopted this 17th day of January, 2023 by the City Council of the City of Lake Elmo, Minnesota. ____________________________________ Mayor Charles Cadenhead ATTEST: _______________________________ Julie Johnson, City Clerk Lake Elmo Planning Commission Meeting Minutes: 11-28-2022 1 City of Lake Elmo Planning Commission Meeting City Council Chambers – 3800 Laverne Avenue North Minutes of Regular Meeting of November 28, 2022 CALL TO ORDER: Commission Chair Steil called to order the meeting of the Lake Elmo Planning Commission at 7:00 p.m. COMMISSIONERS PRESENT: Mueller, Steil, Rehkamp, Vrieze COMMISSIONERS ABSENT: Risner STAFF PRESENT: Planning Director Molly Just, City Planner Ben Hetzel Pledge of Allegiance at 7:00 PM Approve Agenda: M/S/P: Vrieze / Mueller: made a motion to approve the agenda. Vote: 4-0, motion carried unanimously. (Risner absent) Approve Minutes: M/S/P: Rehkamp / Vrieze made a motion to approve the 11-14-22 meeting minutes. Vote: 4-0, motion carried unanimously. (Risner absent) Public Hearing: a) Upper 33rd Street N Conditional Use Permit Request. A conditional use permit request to construct a four unit townhome building on PIDs 13.029.21.32.0052 and 13.029.21.32.0051. City Planner Hetzel gave presentation and answered questions. RECOMMENDED CONDITIONAL USE FINDINGS Conditional use means a land use or development as defined by ordinance that would not be appropriate generally but may be allowed with appropriate restrictions as provided by official controls only upon a finding that all of the following provisions are met. Staff recommends the following findings: 1. The proposed use will not be detrimental to or endanger the public health, safety, comfort, convenience or general welfare of the neighborhood or the city. The proposed use will not endanger the public health, safety, comfort, convenience or general welfare of the neighborhood or the City. 2. The use or development conforms to the City of Lake Elmo Comprehensive Plan. The site is already zoned in conformance with the intent of the Old Village District of the Village Planning Area and the Village Mixed Use zoning district. 3. The use or development is compatible with the existing neighborhood. The proposed use is compatible with the existing single family residential in the neighborhood. The design of the proposed structure is consistent with the surrounding area in terms of building height, building materials, colors, and variations of pitched roofs. Lake Elmo Planning Commission Meeting Minutes: 11-28-2022 2 4. The proposed use meets all specific development standards for such use listed in the Zoning Code. The use meets all the specific development standards for single family attached dwellings set forth in LEC 05.12.820(a)(3). 5. If the proposed use is in a flood plain management or shoreland area, the proposed use meets all the specific standards for such use listed in Article XIX (Shoreland Management) and Title 100 (Flood Plain Management). The proposed use is not within a Shoreland Management District or a Floodplain Management zone. 6. The proposed use will be designed, constructed, operated, and maintained so as to be compatible in appearance with the existing or intended character of the general vicinity and will not change the essential character of that area. The design of the proposed structure is designed to be compatible with the height, colors, and building materials of the surrounding area. 7. The proposed use will not be hazardous or create a nuisance as defined under this Chapter to existing or future neighboring structures. The use is not hazardous and will not create a nuisance. 8. The proposed use will be served adequately by essential public facilities and services, including streets, police and fire protection, drainage structures, refuse disposal, water and sewer systems and schools or will be served adequately by such facilities and services provided by the persons or agencies responsible for the establishment of the proposed use. The proposed use will be served adequately by essential public facilities and services. 9. The proposed use will not create excessive additional requirements at public cost for public facilities and services and will not be detrimental to the economic welfare of the community. The proposed use will not create excessive additional requirements at a public cost. 10. The proposed use will not involve uses, activities, processes, materials, equipment, and conditions of operation that will be detrimental to any persons, property, or the general welfare because of excessive production of traffic, noise, smoke, fumes, glare, or odors. The proposed residential use will not produce excessive noise, fumes, glare, or odors. The addition of four dwelling units should not create excessive traffic along 33rd Street N especially with the restriction of on street parking. Any future expansion of 33rd Street N to the west will further improve traffic circulation. 11. Vehicular approaches to the property, where present, will not create traffic congestion or interfere with traffic on surrounding public thoroughfares. The proposed structure will not create traffic congestion or interfere with traffic on surrounding public thoroughfares. Four additional residential units should not create congestion. The rear facing garages and singular access creates for a safer vehicle access onto Upper 33rd Street N by eliminating the need to back out into a public street. 12. The proposed use will not result in the destruction, loss, or damage of a natural or scenic feature of major importance. The use will not result in the destruction, loss, or damage of a natural or scenic feature of major importance. RECOMMENDED CONDITIONS OF APPROVAL: 1. The applicant must obtain all other necessary City, State, and other governing body permits and approvals prior to the commencement of any construction activity onsite. 2. All recommendations in the City Engineer’s memorandum dated 11/15/22 shall be met prior to any construction activity. 3. All recommendations provided be the City’s Landscape Architect shall be met prior to any construction activity. 4. All conditions in the Fire Chief’s memorandum dated 11/8/22 must be met prior to any construction activity. 5. The applicant shall provide the City with recorded documents from Washington County which effectuate the required lot consolidation prior to any construction activity. 6. The applicant must receive an approved address from Washington County prior to any construction activity. Lake Elmo Planning Commission Meeting Minutes: 11-28-2022 3 7. The applicant shall provide one additional off-street parking space for visitor parking as per Lake Elmo City Code. 8. An encroachment agreement is required for fencing located in the required drainage and utility easements prior to any construction activity. A fence permit is also required regardless of the location of the fencing. 9. If the applicant has not taken action toward starting the townhouse structure or if substantial construction has not taken place within 12 months of the City’s approval of the conditional use permit, the CUP approval shall become void. The applicant may request City Council approval of a time extension to start or implement the conditional use permit. PUBLIC COMMENT: A public hearing notice was sent to surrounding property owners on November 16, 2022 and published in the Stillwater Gazette on November 18, 2022. Staff has received three public comments, City Planner Hetzel read responses from: Urban Coffee – 349 Lake Elmo Ave N – emailed their full support of this CUP. Jill Martin – 11002 Upper 33rd St N – provided comment to staff in opposition of the CUP. Response from Susan Dunn - 11018 Upper 33rd Street N – was not read aloud, as she was in the audience Applicant Henry Elgersma, with Upper 33rd LLC, spoke in regards to this project and answered questions. Public hearing opened at 7:20 PM. JoAnne Lawen – 11051 34th St N – is in opposition of the CUP due to community design and the existing density of the community. Elizabeth Everson – 11075 34th St N – posed the question regarding why the garages were in the back and who was going to be managing the property, is there a maximum capacity per unit and would pets be allowed Ann Bucheck – 2301 Legion Ave N – is in opposition of the CUP due to this building not conforming to the Comprehensive Plan in many aspects. Susan Dunn – 11018 Upper 33rd St N – is in opposition of the CUP due to parking, safety, water, impervious surface area, snow removal, building size Public hearing closed at 7:33 PM M/S/P: Vrieze / Mueller moved to recommend approval of a conditional use permit to allow the construction of a four unit townhome building at the properties described as Lots 10 and 11, Block 2, Subdivision of Lake Elmo Park Vote: 4-0, motion carried unanimously. Vrieze stated that he is in support of this project as long as the applicant abides by the conditions of approval provided by city staff, but does state that the parking spaces do need to be addressed before final approval has been given. Mueller does have concerns regarding the parking and driveway location but does think this is an appropriate building for this location and is in support of this project. Rehkamp is concerned that this property will be sold to someone that will not manage and maintain it properly, the applicant did a nice job of presenting a good plan that will help screen neighbors from the railroad noise. Steil is also in favor of this project, as it does meet the city code, and the parking is in the back. Public Hearing: b) Final PUD Plan and Final Plat – Royal Golf Club at Lake Elmo 5th Addition. U.S. Home, LLC (Lennar) for approval of a Final PUD Plan and Final Plat for 43 lots for single-family homes. There would be 46 lots remaining to be final platted. Director Just gave presentation and answered questions. Lake Elmo Planning Commission Meeting Minutes: 11-28-2022 4 RECOMMENDED FINDINGS: 1. That all the requirements of City Code Sections 153.07 and 154.759 related to Final Plat and Final PUD Plans have been met by the Applicant. 2. That the Royal Golf Club at Lake Elmo 3rd Addition Final Plat and PUD Plans are generally consistent with Preliminary Plat and PUD Plans approved by the City of Lake Elmo on June 6, 2017. 3. That the Royal Golf Club at Lake Elmo 3rd Addition Final Plat and PUD Plans are consistent with the Lake Elmo Comprehensive Plan and the Future Land Use Map for this area. 4. That the Royal Golf Club at Lake Elmo 3rd Addition Final Plat and PUD Plans generally comply with the City’s GCC - Golf Course Community zoning districts as modified by the PUD regulations. 5. That the Royal Golf Club at Lake Elmo 3rd Addition Final Plat PUD Plans comply with the City’s subdivision ordinance. 6. That the Royal Golf Club at Lake Elmo 3rd Addition Final Plat and PUD Plans comply with the City’s Planned Unit Development Regulations. 7. That the Royal Golf Club at Lake Elmo 3rd Addition Final Plat and PUD Plans comply with the City’s Engineering Standards, except where noted in the review memorandum from the City Engineer dated November 19, 2018 and modified by PUD regulations. 8. That the Royal Golf Club at Lake Elmo 3rd Addition Final Plat and PUD Plans generally comply with other City zoning ordinances, shoreland, and erosion and sediment control, except as noted in this staff report and review memorandum from the City Engineer dated November 19, 2018. 9. That the Royal Golf Club at Lake Elmo 3rd Addition Final Plat and PUD Plans generally comply with the City’s landscaping and tree preservation ordinances, providing some flexibility to the Applicant to allow for woodland management and pollinator friendly native seeding in lieu of some required tree replacement in order to avoid possible detriment caused by over planting. 10. That the Royal Golf Club at Lake Elmo 3rd Addition Final Plat and PUD Plans achieve multiple identified objectives for planned developments within Lake Elmo. 11. That the proposed Final Plat and PUD Plans are for the 3rd Addition of 67 single family residential units of a 291-unit total residential golf course community Planned Unit Development on 103.7 acres of land (of 231 acres total) located on the former 3M Tartan Park properties. 12. That the Final Plat and PUD Plans will be located on property legally described on the attached Exhibit “A”. 13. That there has been significant public testimony that 20th Street is already dangerous without the additional traffic and that the City and developer need to explore ways to make the road safer. 14. That the proposed PUD will allow a more flexible, creative, and efficient approach to the use of the land, and will specifically relate to existing zoning district standards in the following manner (with exceptions as noted): a. Setbacks: i. Royal Golf Club at Lake Elmo Setbacks 15. 16. 100 Ft. Wide Lots 17. 80-90 Ft. Wide Lots 18. 55-65 Ft. Wide Lots 19. Front 20. 30 ft. 21. 30 ft. 22. 20 ft. for side loaded garages, or 25’ Lake Elmo Planning Commission Meeting Minutes: 11-28-2022 5 23. Side 24. 10 ft. 25. 10 ft. 26. 10ft. house/5ft. garage or 7.5 ft./7.5 ft. 27. Corner Side 28. 15 ft. 29. 15 ft. 30. 15 ft. 31. Rear 32. 30 ft. 33. 30 ft. 34. 20 ft. a. Maximum Impervious Coverage: The maximum impervious coverage for 55-65’ wide lots shall be 50%. All other lots shall have a maximum impervious coverage of 40%. b. Lot Sizes: The minimum lot size for Villa lots (55-65’ wide) in the development shall be 6,600 sq. ft. c. Attached Garages: That attached garages shall not exceed 1,300 sq. ft. in area at the ground floor level except by conditional use permit. The width of the visible garage door area when closed shall not exceed 60% of the principal building façade (including garage) fronting on the primary street. d. Subdivision Identification Signs: The Royal Golf Club at Lake Elmo residential subdivision shall be allowed up to a maximum of 4 subdivision identification signs, including the identification sign for the golf course entrance, not to exceed 24 sq. feet in sign area each, located no closer than 10 feet to any public right-of-way. In addition, neighborhood identification markers (pillars) shall be permitted to be no larger than 2 ft. x 2 ft. to identify the development logo and the name of the neighborhood. Additional subdivision signs should be considered for a subdivision of this size. i. Staff Note: If the developer requests a change to this, a variance should be requested. e. All other requirements for the City’s GCC – Golf Course Community zoning district will apply, including the allowed uses and other site and development standards. f. That the proposed street names within the development are generally consistent with the City’s Street Naming Policy as amended April 17, 2018. g. The developer has not yet constructed an HOA-owned and maintained play structure as required by the original condition of approval of the 2nd Addition Final Plat. Recommended Conditions of Approval. Staff recommends the following conditions of approval: 1. That there shall be no encroachments to drainage and utility easements on residential lots other than those reviewed and approved by the City Engineer and upon execution of an easement encroachment agreement. 2. Prior to the execution of Final Plat, the Developer shall enter into a Developer’s Agreement acceptable to the City Attorney and approved by the City Council that delineates who is responsible for the design, construction, and payment of the required improvements with financial guarantees therefore. 3. The Royal Golf Club at Lake Elmo 3rd Addition shall be incorporated into the Common Interest Agreement concerning management of the common areas and establish a homeowner’s association (HOA) which shall be submitted in final form to the Planning Director before any building permit may be issued for any structure in any phase of the development. Said agreement shall comply with Minnesota Statues 515B-103 and specifically the provisions concerning the transfer of control to the future property owners. The HOA documents shall include required maintenance of wetland buffers. 4. That the HOA documents include architectural requirements that require four-sided architecture and garages facing the public rights-of-way to have windows and/or other architectural features. 5. The applicant shall enter into a landscape license and maintenance agreement with the City that clarifies the individuals or entities responsible for landscaping. Lake Elmo Planning Commission Meeting Minutes: 11-28-2022 6 6. The developer shall provide evidence of an HOA owned and maintained children’s play structure or other similar improvement has been constructed within Outlot D of the 2nd Addition before the release of building permits for the 3rd Addition. 7. That a fee in lieu of park land dedication be paid to the City based upon an appraisal by an appraiser to be chosen by the City and paid for by the developer. 8. That the developer pay a parkland dedication fee equal to $500 per 2.5 caliper inch required in lieu of some required tree preservation replacement tree requirements, totaling $111,552.00 in lieu of planting the required number of trees required. This fee was calculated as follows: $500.00 multiplied by 969 2.5-caliper inch tree not planted within the entire subdivision, divided by 291 single family lots within the entire subdivision, multiplied by 67 single family lots within the 3rd Addition. 9. All changes and modifications to the plans requested by the City Engineer in the Engineer’s review memo dated November 19, 2018 shall be incorporated into the Final Plat and PUD Plans. The Applicant should note the requirements for VBWD permits for temporary storm water management. 10. The Final Plat and PUD Plans approval is conditioned upon the applicant meeting all City standards and design requirements unless specifically addressed otherwise in this resolution. 11. Prior to the City issuing building permits, all wetland buffers shall be delineated and identified via staking or signage that is acceptable to the City. 12. Prior to the construction of any subdivision identification signs or neighborhood markers within the development, the developer shall submit sign plans for review and obtain a sign permit from the Planning Department. Any amendments to the finding regarding signs indicated in this Resolution shall be subject to a PUD amendment or variance. 13. That the Final Plat include street names as approved by Council. 14. The developer shall follow all of the rules and regulations spelled out in the Wetland Conservation Act and shall acquire the needed permits from the appropriate watershed districts prior to the commencement of any grading or development activity on the site. 15. That the Royal Golf Club development will not have street lights except at street intersections and cul- de-sacs. 16. That the developer make a $1,000,000 donation to the City Parks fund when construction of the 3rd Addition prohibits use of the former Tartan Park ballfields, including construction materials storage and before the city releases the 3rd Addition final plat for recording. 17. The location and spacing of the trees that overlap the buildings and on edge of driveway when shown at mature diameter is adjusted and resubmitted on a revised landscape plan, per the Landscape Review memo, dated November 8, 2018. 18. The developer shall pave the unfinished trail in the 2nd Addition as soon as favorable conditions are available in the spring of 2019. The City may choose to not release building permits for the 3rd Addition in the spring of 2019 if the developer has not completed the required trail paving in a timely manner. Applicant Paul Tabone spoke regarding this project and was available for questions. Public hearing opened at 7:50 PM. No public comments Public hearing closed at 7:51 PM Lake Elmo Planning Commission Meeting Minutes: 11-28-2022 7 M/S/P: Mueller / Rehkamp moved to recommend approval of the Royal Golf Club at Lake Elmo 5th Addition Final Plat and PUD Plans based on the findings off act and conditions outlined in the Staff Report. Vote: 4-0, motion carried unanimously. Mueller had no comments, Rehkamp had concerns about the loss of tree coverage but believes the staff have addressed that issue, Vrieze agrees, Steil concurs with all previous comments Regular Business None Communications/Updates - City Council Updates None Upcoming Meetings a. December 12th, 2022 b. December 28th, 2022 Meeting adjourned at 7:55 PM. Respectfully submitted, Diane Wendt Permit Technician Element Design-Build LLC Element-db.com CUP Application – Written Statements (Updated) Upper 33rd Street A) Contact Information Owners: Henry Elgersma 393 Cleveland Ave S, Saint Paul, MN 55105 515-441-2594 Ryan McKilligan: 1110 Raymond Ave #3, Saint Paul, MN 55108 651-502-1470 Civil Engineer: T.J. Rose, P.E. 3524 Labore Road, White Bear Lake, MN 55110 651-481-9120 Architect: Henry Elgersma, AIA 393 Cleveland Ave S, Saint Paul, MN 55105 515-441-2594 B) Site Data No address assigned V-MX (Village Mixed Use) zoning 12,499 SF (.287 acres) – PID 1302921320052 5,000 SF (.115 acres) – PID 1302921320051 Legal Description: SubdivisionName ELMO PARK Lot 11 Block 2 SubdivisionCd 37200 SubdivisionName ELMO PARK Lot 10 Block 2 SubdivisionCd 37200 LOTS 11&12 & E1/2 OF LT 13 002 ELMO PARK ADD SUBDIVISIONNAME ELMO PARK LOT 11 BLOCK 2 SUBDIVISIONCD 37200 C) Property history Currently a vacant piece of land D) Proposed use Element Design-Build LLC Element-db.com i. We are proposing a residential use comprised of four single-family attached rental dwelling units on one combined lot. The units will each have a main entry facing Upper 33rd Street with open front yards to create an appealing front elevation and connection to the surrounding community. Each unit will have a side-facing two car garage accessed from a shared private driveway. Two access points for vehicles on the southern portion of the site is proposed, with both side yards being maintained for open space along with the rear yard and much of the front yard. The proposed building conforms to all setback requirements and leaves ample space between the structure and adjacent properties. Fencing will be provided to screen between the properties to the west, east, and north. There should be minimal impact to any wetland or forest natural areas. ii. No employees or hours of operation for residential use. Proposed development schedule would be construction during 2023 construction season with opening late 2023. E) Justification i. The proposed Residential use of Attached Single Family Dwellings is consistent with the context of the adjacent area in terms of overall building height, quality of proposed building, and residential use. The use will not be detrimental to public health, safety, comfort, convenience, or general welfare of the neighborhood or City. ii. Lake Elmo 2040 Comprehensive Plan Goals for the Old Village District include encouraging walkable, pedestrian scale buildings, encouraging an increase in households, and supporting development of various housing types throughout the community for various life stages. The proposed density of 4 dwelling units in 4.02 acres is consistent with the Lake Elmo 2040 Comprehensive Plan which allows a minimum of 5 up to 10 dwelling units per acre for the Village Mixed Use designation. We believe introducing four high-quality, single family attached rental homes contributes to these goals by increasing the population to support the nearby businesses on Lake Elmo Ave, contributing to the walkable quality of the neighborhood with pedestrian scaled buildings with entrances that face the street, and complying with the density target for the V-MU area. Additionally, creating four high-quality rental units diversifies the housing options that are currently almost entirely owner-occupied, and offers a low-maintenance living option for residents in any stage of life. Element Design-Build LLC Element-db.com iii. The proposed project’s compatibility with the existing neighborhood is established through: 1. Creating all 1-1/2 story units which are similar in height to existing housing nearby 2. Using similar materials and color palettes to nearby houses and buildings on Lake Elmo Ave. 3. Utilizing varied pitched roofs and wall planes to tie into the existing massing and shape of nearby homes and the break the building down into smaller parts 4. Using similar window patterning as nearby homes and businesses 5. Creating primary entrances that face the street and sidewalks to encourage pedestrian connection to the neighborhood 6. Minimizing the visual impact of the garages by having them face to the side and applying architectural treatments so they don’t appear like front facing garages including generous windows, accent roofs, and siding material changes. After listening to feedback from the community at the Planning Commission meeting on 11/28, the design and development team reworked the configuration of the project to better address many of the concerns shared at that meeting in an effort to make the project best fit the neighborhood context it is in and ease neighbors’ concerns. Concerns voiced included: 1. Lack of parking other than enclosed garages 2. Stormwater management concerns 3. Rear driveway taking up much of the west side and rear yards with pavement 4. Screening train noise from the south to units 5. Screening to neighboring properties 6. Snow management 7. Large scale of the building compared to neighboring buildings 8. Management of the property The reworking of the design removes the large driveway to access the rear facing garages while keeping the front doors facing Upper 33rd Street and minimizing the visual impact of the garage. The advantages that relate to the concerns raised include: 1. Adding two guest parking stalls in addition to the two stalls per unit of parking already provided, each conveniently located close to the unit entries 2. Reducing impervious surface by almost 20% which helps with stormwater management. Also, see final stormwater design and calculations submitted. Element Design-Build LLC Element-db.com 3. Both side yards and the rear yard are now unpaved, open areas 4. Garages are now located between the railroad and the living space of the unit, screening railroad noise 5. We added fence screening along east, west, and north property lines 6. Less driveway surface creates less snow to remove, ample space is located on each side of driveway in front yards 7. All four units are now 1.5 stories tall (rather than two being full two stories) and are more visually separated with changes in massing that create the look of four separate structures that are similar in scale to the neighborhood 8. The property will be professionally managed by a company that manages dozens of properties. The design and development team believes these changes address many of the concerns raised from the community. We are eager to listen and work to create a sensitive and quality design that will contribute positively to the community. We have worked hard to adhere to all zoning regulations and believe all aspects of the project are fully compliant with all applicable guidelines and regulations as designed. We believe this product will contribute positively to the neighborhood and the Lake Elmo Historic Village. 3311 3331 3316 3330 11035 3327 3343 3338 33033308 3328 11018 11002 11074 11051 11072 11052 11057 11123 11090 3442 11082 11098 3504 3476 11105 3466 11075 3390 3394 351411094 ArcGIS Web AppBuilder Parcels Easement Lines COMPUTED UTILITY_DRAINAGE MNWASH038007.sid Red: Band_1 Green: Band_2 Blue: Band_3 MNWASH032009.sid Red: Band_1 Green: Band_2 Blue: Band_3 MNWASH026009.sid Red: Band_1 Green: Band_2 Blue: Band_3 MNWASH020009.sid Red: Band_1 11/23/2022, 8:38:52 AM 0 0.03 0.050.01 mi 0 0.04 0.080.02 km 1:2,257 PROPOSED 8" DIPPROPOSED 8" SANITARYPROPOSED 15" RCPPROPOSED CBTC=930.54INV=926.01PROPOSED CBTC=933.06INV=924.23UPPER 33RD STREET N.DescriptionRev.DateUPPER 33RD STREETTOWNHOUSEDEVELOPMENTLAKE ELMO, MNSheet Title:Project #:Drawn By:Checked By:Issue Date:12226050TJRMJW01.06.233524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comC 2022 Larson Engineering, Inc. All rights reserved.P:\Projects\Projects - 2022\12226050 - Upper 33rd Street Townhouse Development (Element)\C. Design\Drawing Files\12226050 - C000 Overall.dwgLarsonEngineering, Inc.Project Title:ELEMENTDESIGN-BUILD1110 RAYMOUND AVENUE, UNIT 3ST. PAUL, MN 55108Client:Matthew J. Woodruff, P.E.Date: Lic. No.:01.06.23I hereby certify that this plan,specifications or report was preparedby me or under my direct supervisionand that I am a duly licensedProfessional Engineer under the lawsof the state of Minnesota.PRELIMINARY NOT FOR CONSTRUCTIONSheet:EXISTINGCONDITIONSEXHIBITC000NOTES1.Existing conditions outside of the project limits were drawn in per an aerialimage and Washington County GIS mapping.LEGENDOVERHEAD ELECTRIC LINESANITARY SEWER PIPESTORM SEWER PIPEWATERMAIN PIPEGAS LINERAILROAD TRACKSSTREET SIGNHYDRANTSTREET LIGHTCATCH BASINTREENORTH0204010 PROPOSED 8" DIPPROPOSED 8" SANITARYPROPOSED 15" RCPUPPER 33RD STREET N.DescriptionRev.DateUPPER 33RD STREETTOWNHOUSEDEVELOPMENTLAKE ELMO, MNSheet Title:Project #:Drawn By:Checked By:Issue Date:12226050TJRMJW01.06.233524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comC 2022 Larson Engineering, Inc. All rights reserved.P:\Projects\Projects - 2022\12226050 - Upper 33rd Street Townhouse Development (Element)\C. Design\Drawing Files\12226050 - C100 Demo.dwgLarsonEngineering, Inc.Project Title:ELEMENTDESIGN-BUILD1110 RAYMOUND AVENUE, UNIT 3ST. PAUL, MN 55108Client:Matthew J. Woodruff, P.E.Date: Lic. No.:01.06.23I hereby certify that this plan,specifications or report was preparedby me or under my direct supervisionand that I am a duly licensedProfessional Engineer under the lawsof the state of Minnesota.PRELIMINARY NOT FOR CONSTRUCTION0NORTH51020Sheet:SAWCUT,REMOVE, AND DISPOSE OF EXISTING CONCRETE CURBAND GUTTER.REMOVE AND DISPOSE OF EXISTING TREE, STUMP, AND ROOTS.1DEMOLITION PLANC100KEY NOTESDEMOLITION NOTES1.Verify all existing utility locations.2.It is the responsibility of the Contractor to perform or coordinate allnecessary utility demolitions and relocations from existing utility locationsto all onsite amenities and buildings. These connections include, but arenot limited to, water, sanitary sewer, cable tv, telephone, gas, electric,site lighting, etc.3.Prior to beginning work, contact Gopher State Onecall (651-454-0002) tolocate utilities throughout the area under construction. The Contractorshall retain the services of a private utility locator to locate the privateutilities.4.Sawcut along edges of pavements, sidewalks, and curbs to remain.5.All construction shall be performed in accordance with state and localstandard specifications for construction.2REMOVE AND DISPOSE OF EXISTINGBITUMINOUS PAVEMENT SECTIONSYMBOL LEGEND PROPOSED 8" DIPPROPOSED 8" SANITARYPROPOSED 15" RCPUPPER 33RD STREET N.PROPOSED4-UNIT TOWNHOMEFFE = 934.00GFE = 933.50GARAGEGARAGEGARAGEGARAGEFRONT DOOR10'SETBACK10' SETBA C K 10'SETBACKFRONT DOOR10.1'10.1'25' SETBA C K 10.4'10.4'25.4' 25.4'22'22'28.9'28.9'9'9'12'16'5'5'10' 10'5'5'333DescriptionRev.DateUPPER 33RD STREETTOWNHOUSEDEVELOPMENTLAKE ELMO, MNSheet Title:Project #:Drawn By:Checked By:Issue Date:12226050TJRMJW01.06.233524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comC 2022 Larson Engineering, Inc. All rights reserved.P:\Projects\Projects - 2022\12226050 - Upper 33rd Street Townhouse Development (Element)\C. Design\Drawing Files\12226050 - C200 Paving.dwgLarsonEngineering, Inc.Project Title:ELEMENTDESIGN-BUILD1110 RAYMOUND AVENUE, UNIT 3ST. PAUL, MN 55108Client:Matthew J. Woodruff, P.E.Date: Lic. No.:01.06.23I hereby certify that this plan,specifications or report was preparedby me or under my direct supervisionand that I am a duly licensedProfessional Engineer under the lawsof the state of Minnesota.PRELIMINARY NOT FOR CONSTRUCTION0NORTH51020Sheet:NEW LIGHT-DUTYBITUMINOUS PAVEMENTSEE DETAIL 1/C500NEW CONCRETE SIDEWALKSEE DETAIL 3/C500SYMBOL LEGENDSITE PLANC200AREA CALCULATIONS:PROPERTY AREA = 17,500 S.F.IMPERVIOUS AREA = 10,056 S.F.IMPERVIOUS PERCENT = 57.5%MAX. ALLOWABLE IMPERVIOUS = 75% (13,125 S.F.)EASEMENT LINERIGHT-OF-WAY LINEPROPERTY LINEGENERAL LEGENDKEY NOTESB612 CURB AND GUTTER, SEE DETAIL 2/C500DRIVEWAY APRON, SEE DETAIL 1/C501PRIVACY FENCE, SEE LANDSCAPING PLANS12SETBACK LINENOTE:LOTS WILL BE CONSOLIDATED INTO ONE LOT.3 PROPOSED4-UNIT TOWNHOMEFFE = 934.00GFE = 933.50GARAGEGARAGEGARAGEGARAGEPROPOSED 8" DIPPROPOSED 8" SANITARYPROPOSED 15" RCPUPPER 33RD STREET N.934.00 FFE933.50 C933.50 C933.50 C933.50 C934.00 FFE934.00 FFE934.00 FFE932.34 TC*931.84 GL*932.55 TC*932.05 GL*932.80 TC*932.30 GL*932.85 TC*932.35 GL*933.50 C933.50 C933.50 C933.50 C933.70 B933.70 B933.05 B933.36 B933.05 B933.36 B933.84 C933.66 C933.84 C933.84 C933.84 C933.66 C933.66 C933.66 C933.87 C933.87 C933.87 C933.87 C933.50933.50930.6*930.05*933.50933.50931.1*933.50933.50933.50933.50932 931 932932.50 B932.70 B932.50 B932.28 B932.90 B933.10 B932.50 B932.28 B932932932931930932931930932931930932 931 933 933 933933933933933DescriptionRev.DateUPPER 33RD STREETTOWNHOUSEDEVELOPMENTLAKE ELMO, MNSheet Title:Project #:Drawn By:Checked By:Issue Date:12226050TJRMJW01.06.233524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comC 2022 Larson Engineering, Inc. All rights reserved.P:\Projects\Projects - 2022\12226050 - Upper 33rd Street Townhouse Development (Element)\C. Design\Drawing Files\12226050 - C300 Grading.dwgLarsonEngineering, Inc.Project Title:ELEMENTDESIGN-BUILD1110 RAYMOUND AVENUE, UNIT 3ST. PAUL, MN 55108Client:Matthew J. Woodruff, P.E.Date: Lic. No.:01.06.23I hereby certify that this plan,specifications or report was preparedby me or under my direct supervisionand that I am a duly licensedProfessional Engineer under the lawsof the state of Minnesota.PRELIMINARY NOT FOR CONSTRUCTIONSheet:GRADING ANDEROSION CONTROLPLANC300PROPOSED CONTOURS - MAJOR INTERVALGRADE BREAK LINEPROPOSED CONTOURS - MINOR INTERVAL949950950EXISTING CONTOURS2.0%950.00 TC949.50 GLGRADE SLOPESPOT ABBREVIATIONS:TC - TOP OF CURBGL - GUTTER LINEC - CONCRETEFFE - FIRST FLOOR ELEVATIONGFE - GARAGE FLOOR ELEVATIONTW - TOP OF WALLBW - BOTTOM OF WALL (F/G)(*) - EXISTING TO BE VERIFIEDSILT FENCERIP-RAP / ROCK CONST. ENTRANCEINLET PROTECTIONGRADING NOTES1.Tree protection consisting of snow fence or safety fence installed at thedrip line shall be in place prior to beginning any grading or demolitionwork at the site.2.All elevations with an asterisk (*) shall be field verified. If elevationsvary significantly, notify the Engineer for further instructions.3.Grades shown in paved areas represent finish elevation.4.Restore all disturbed areas with 4” of good quality topsoil and seed.5.All construction shall be performed in accordance with state and localstandard specifications for construction.6.No wheeled machines shall be used to excavate BMP(s), and/or duringthe backfilling.7.No construction traffic is allowed over the BMP(s) during any phase ofthe project.8.BMP(s) shall be protected from all exposed soil during all constructionactivities.9.BMP(s) shall not be open to accept water until the site is stabilized.SYMBOL LEGENDKEY NOTESROCK CONSTRUCTION ENTRANCE, SEE DETAIL 7/C500SILT FENCE, SEE DETAIL 8/C500INLET PROTECTION, SEE DETAIL 6/C500123SEDIMENT LOG1.Install temporary erosion control measures (inlet protection, silt fence, and rock construction entrances)prior to beginning any excavation or demolition work at the site.2.Erosion control measures shown on the erosion control plan are the absolute minimum. Thecontractor shall install temporary earth dikes, sediment traps or basins, additional siltation fencing,and/or disk the soil parallel to the contours as deemed necessary to further control erosion.3.All construction site entrances shall be surfaced with crushed rock across the entire width of theentrance and from the entrance to a point 50' into the construction zone.4.The toe of the silt fence shall be trenched in a minimum of 6”. The trench backfill shall be compactedwith a vibratory plate compactor.5.All grading operations shall be conducted in a manner to minimize the potential for site erosion.Sediment control practices must be established on all down gradient perimeters before any up gradientland disturbing activities begin.6.All exposed soil areas must be stabilized as soon as possible to limit soil erosion but in no case laterthan 14 days after the construction activity in that portion of the site has temporarily or permanentlyceased. Temporary stockpiles without significant silt, clay or organic components (e.g., cleanaggregate stockpiles, demolition concrete stockpiles, sand stockpiles) and the constructed basecomponents of roads, parking lots and similar surfaces are exempt from this requirement.7.The normal wetted perimeter of any temporary or permanent drainage ditch or swale that drains waterfrom any portion of the construction site, or diverts water around the site, must be stabilized within 200lineal feet from the property edge, or from the point of discharge into any surface water. Stabilizationof the last 200 lineal feet must be completed within 24 hours after connecting to a surface water.Stabilization of the remaining portions of any temporary or permanent ditches or swales must becomplete within 14 days after connecting to a surface water and construction in that portion of the ditchhas temporarily or permanently ceased.8.All storm sewer catch basins not needed for site drainage during construction shall be covered toprevent runoff from entering the storm sewer system. Catch basins necessary for site drainage duringconstruction shall be provided with inlet protection.9.In areas where concentrated flows occur (such as swales and areas in front of storm catch basins andintakes) the erosion control facilities shall be backed by stabilization structure to protect those facilitiesfrom the concentrated flows.10.Inspect the construction site once every seven days during active construction and within 24 hoursafter a rainfall event greater than 0.5 inches in 24 hours.11.All BMPs must be repaired, replaced, or supplemented when they become nonfunctional or thesediment reaches 1/3 of the capacity of the BMP. These repairs must be made within 24 hours ofdiscovery, or as soon as field conditions allow access.12.If sediment escapes the construction site, off-site accumulations of sediment must be removed in amanner and at a frequency sufficient to minimize off-site impacts.13.All soils tracked onto pavement shall be removed daily.14.Temporary soil stockpiles must have silt fence or other effective sediment controls, and cannot beplaced in surface waters, including stormwater conveyances such as curb and gutter systems, orconduits and ditches unless there is a bypass in place for the stormwater.15.Collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric, constructionand demolition debris and other wastes must be disposed of properly and must comply with MPCAdisposal requirements.16.Oil, gasoline, paint and any hazardous substances must be properly stored, including secondarycontainment, to prevent spills, leaks or other discharge. Restricted access to storage areas must beprovided to prevent vandalism. Storage and disposal of hazardous waste must be in compliance withMPCA regulations.17.External washing of trucks and other construction vehicles must be limited to a defined area of the site.Runoff must be contained and waste properly disposed of. No engine degreasing is allowed onsite.18.All liquid and solid wastes generated by concrete washout operations must be contained in aleak-proof containment facility or impermeable liner. A compacted clay liner that does not allowwashout liquids to enter ground water is considered an impermeable liner. The liquid and solid wastesmust not contact the ground, and there must not be runoff from the concrete washout operations orareas. Liquid and solid wastes must be disposed of properly and in compliance with MPCAregulations. A sign must be installed adjacent to each washout facility to inform concrete equipmentoperators to utilize the proper facilities.19.Upon completion of the project and stabilization of all graded areas, all temporary erosion controlfacilities (silt fences, hay bales, etc.) shall be removed from the site.20.A City approved dewatering/pumping plan is required prior to any pumping activity. Notify City ofRoseville Engineering Dept. at 651-792-7004 prior to beginning any pumping activity.21.Notify City of Roseville Engineering Dept. at 651-792-7004, prior to beginning any and all constructionactivity to verify Erosion Control Measures are in place.22.Notify City of Roseville Engineering Dept. at 651-792-7004, at least 24 hours prior to the constructionof stormwater BMPs.EROSION CONTROL NOTESNORTH010205 PROPOSED4-UNIT TOWNHOMEFFE = 934.00GFE = 933.50GARAGEGARAGEGARAGEGARAGEPROPOSED 8" DIPPROPOSED 8" SANITARYPROPOSED 15" RCPUPPER 33RD STREET N.120 LF 36" NON-PERFORATED PIPEINV: 925.5020 LF 60" NON-PERFORATED PIPEINV: 925.50CONSTRUCT CATCH BASINOVER EXISTING STORM SEWERRIM= 932.3*INV=924.46*81 LF 1 2 " H D P E @ 1 . 0 %STMHRIM: 930.75TOP WEIR: 928.256" ORIFICE: 927.003" ORIFICE: 925.50INV: 925.5023 LF 12" HDPE @ 1.0%STMHRIM: 931.50INV: 924.7073 LF 12" PVC SCH 40 @ 1.1%STMHRIM: 932.15TOP WEIR: 930.004" ORIFICE: 927.753.5" ORIFICE: 925.50INV: 925.50INLINE DRAINRIM: 931.50INV: 928.8457 LF 8" PVC SCH 40 @ 2.0%CONNECT TO SYSTEMINV = 927.50INLINE DRAINRIM: 929.50INV: 926.50INLINE DRAINRIM: 929.50INV: 926.50INLINE DRAINRIM: 929.50INV: 926.50HDPE RISERRIM = 931.5055 LF 6" PVC SCH 40 @ 1.0% MIN11 LF 8" PVCSCH 40 @ 1.0% MINDescriptionRev.DateUPPER 33RD STREETTOWNHOUSEDEVELOPMENTLAKE ELMO, MNSheet Title:Project #:Drawn By:Checked By:Issue Date:12226050TJRMJW01.06.233524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comC 2022 Larson Engineering, Inc. All rights reserved.P:\Projects\Projects - 2022\12226050 - Upper 33rd Street Townhouse Development (Element)\C. Design\Drawing Files\12226050 - C400 Utilities.dwgLarsonEngineering, Inc.Project Title:ELEMENTDESIGN-BUILD1110 RAYMOUND AVENUE, UNIT 3ST. PAUL, MN 55108Client:Matthew J. Woodruff, P.E.Date: Lic. No.:01.06.23I hereby certify that this plan,specifications or report was preparedby me or under my direct supervisionand that I am a duly licensedProfessional Engineer under the lawsof the state of Minnesota.PRELIMINARY NOT FOR CONSTRUCTION0NORTH51020Sheet:UTILITY PLANC400CABLE UNDERGROUND LINEFIBER OPTIC UNDERGROUND LINEELECTRIC UNDERGROUND LINEELECTRIC OVERHEAD LINETELEPHONE UNDERGROUND LINESTORM SEWER PIPESANITARY SEWER PIPENATURAL GAS UNDERGROUND LINEWATERMAIN PIPELIGHT POLESTORM MANHOLEFLARED ENDCURB INLETCATCH BASINWATER SHUTOFFGATE VALVE & BOXHYDRANTSANITARY MANHOLEDRAINTILE PIPEUTILITY NOTES1.It is the responsibility of the contractor to perform or coordinate all necessary utility connections andrelocations from existing utility locations to the proposed building, as well as to all onsite amenities.These connections include but are not limited to water, sanitary sewer, cable TV, telephone, gas,electric, site lighting, etc.2.All service connections shall be performed in accordance with state and local standardspecifications for construction. Utility connections (sanitary sewer, watermain, and storm sewer)may require a permit from the City.3.The contractor shall verify the elevations at proposed connections to existing utilities prior to anydemolition or excavation.4.The contractor shall notify all appropriate engineering departments and utility companies 72 hoursprior to construction. All necessary precautions shall be made to avoid damage to existing utilities.5.Storm sewer requires testing in accordance with Minnesota plumbing code 4714.1109 wherelocated within 10 feet of waterlines or the building.6.HDPE storm sewer piping shall meet ASTM F2306 and fittings shall meet ASTM D3212 jointpressure test. Installation shall meet ASTM C2321.7.Maintain a minimum of 7 ½' of cover over all water lines and sanitary sewer lines. Where 7 ½' ofcover is not provided, install 2” rigid polystyrene insulation (MN/DOT 3760) with a thermalresistance of at least 5 and a compressive strength of at least 25 psi. Insulation shall be 8' wide,centered over pipe with 6” sand cushion between pipe and insulation. Where depth is less than 5',use 4” of insulation.8.Install water lines 12” above sewers. Where the sewer is less than 12" below the water line (orabove), install sewer piping of materials approved for inside building use for 10 feet on each side ofthe crossing.9.A City approved dewatering/pumping plan is required prior to any pumping activity. Notify City ofRoseville Engineering Dept. at 651-792-7004 prior to beginning any pumping activity.SYMBOL LEGENDKEY NOTESWATERMAIN SERVICE, SEE DETAILROOF DRAIN CONNECTION, SEE DETAILSANITARY SEWER SERVICE, SEE DETAILSTORM SEWER MANHOLE, SEE DETAIL1234 DescriptionRev.DateUPPER 33RD STREETTOWNHOUSEDEVELOPMENTLAKE ELMO, MNSheet Title:Project #:Drawn By:Checked By:Issue Date:12226050TJRMJW01.06.233524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comC 2022 Larson Engineering, Inc. All rights reserved.P:\Projects\Projects - 2022\12226050 - Upper 33rd Street Townhouse Development (Element)\C. Design\Drawing Files\12226050 - C500 Details.dwgLarsonEngineering, Inc.Project Title:ELEMENTDESIGN-BUILD1110 RAYMOUND AVENUE, UNIT 3ST. PAUL, MN 55108Client:Matthew J. Woodruff, P.E.Date: Lic. No.:01.06.23I hereby certify that this plan,specifications or report was preparedby me or under my direct supervisionand that I am a duly licensedProfessional Engineer under the lawsof the state of Minnesota.PRELIMINARY NOT FOR CONSTRUCTIONSheet:DETAILSC50090° PVC. BEND6" PVCDOWNSPOUTCONNECT PVC PIPE (SEEPLAN FOR SIZES) TO NEWCATCH BASIN AS SHOWNON PLANREMOVE EXISTING ELBOW &CONNECT 6" PVC TOGUTTER DOWNSPOUTNOT TO SCALECONNECTION DETAILROOF DRAIN4C500NOT TO SCALEPAVEMENT SECTIONLIGHT-DUTY BITUMINOUS1C500EXISTING SUBGRADE SOILNEW 6" BASEAGGREGATENEW 3" BITUMINOUS PAVEMENTPLACED IN 2 LIFTSNOT TO SCALECURB & GUTTER DETAILB612 CONCRETE2C500EXISTING SUBGRADE SOIL6"12"13.5"6"7"6"BACKFILL WITH NEWGOOD QUALITYTOPSOIL AND SODNEW BITUMINOUSPAVEMENTNEW BASEAGGREGATESLOPE34" PER FT.8"R3"R3"6"TIP OUT GUTTER AS NEEDEDNOT TO SCALECONSTRUCTION DETAILCONCRETE SIDEWALK3C500NEW 4" PORTLAND CEMENT CONCRETENEW 6" BASEAGGREGATEAPPROVED SUBGRADE SOILMIN. 6" OF 1" TO2" DIA ROCK.MNDOT STANDARDSPECIFICATION 3733 TYPE VPERMEABLE GEOTEXTILEFABRIC BENEATH ROCK30' MINIMUMHARD SURFACEPUBLIC ROAD18" MIN. HIGH CUT-OFF BERM TOMINIMIZE SILT RUNOFF FROM SITE.VARIES:FULL WIDTH OF EXISTINGDRIVEWAY OPENING OR20' MIN. WIDTH.NOT TO SCALEROCK CONSTRUCTION ENTRANCE7C500ENGINEERING FABRICWIRE MESH REINFORCEMENT(OPTIONAL)METAL, WOOD POST, OR STAKE.8' MAX. SPACING, 2' INTO GROUND.NATURAL SOILDIRECTIONOF RUNOFFNOT TO SCALEINSTALLATION DETAILSILT FENCE8C500NOTE: DEPENDING UPON CONFIGURATION, ATTACH FABRIC TO WIRE MESHWITH HOG RINGS, STEEL POSTS WITH WIRES, OR WOOD POSTS WITH STAPLES.FABRIC ANCHORAGETRENCH. BACKFILL WITHTAMPED NATURAL SOILREUSABLE400 MICRONFILTER BAG INEACH BASKETNOT TO SCALE PROTECTION DEVICEINFRASAFE INLET6C500SIDE VIEWFRONT VIEW(OR EQUAL)VARIABLE1'-4"VARIABLE5" MIN.NOT TO SCALEMANHOLE DETAILCATCH BASIN5C500SECTION8"PIPEDIA.PLANPRECAST INVERT SHOULD BE 1/2DIAMETER OF PIPE AND BENCHESSLOPED 2" TOWARD INVERT.MANHOLE FRAME & COVER:NEENAH R-3067, TYPE L GRATE (CURB INLET)NEENAH R-1642, TYPE B LID (STMH, SOLID CLOSED, ROUND)*UNLESS OTHERWISE NOTEDMANHOLE STEPS SHALL BE PLACEDSO THAT OFFSET HOLE IN TOP SLABIS FACING DOWNSTREAM.NO BLOCK STRUCTURES ARE ALLOWEDGRADE 1" BELOW 10' TRANSITION.MINIMUM OF 2, MAXIMUM OF 5CONCRETE ADJUSTMENT RINGS WITH FULLBED OF MORTAR BETWEEN EACH ANDA 4" COLLAR ON THE OUTSIDE. NO SHIMSOF ANY MATERIAL ALLOWED.INSTALL NEW EXTERNAL CHIMNEY SEAL.6" PRECAST REINFORCED CONCRETE SLAB.SEAL WITH 2 BEADS OF RAM-NEK.ALL JOINTS IN MANHOLE TO HAVE'O' RING RUBBER GASKETS.MANHOLE STEPS, COPOLYMER POLYPROPYLENEPLASTIC, WITH 1/2" GRADE 60 STEELREINFORCEMENT OR EQUAL, 16" O.C.PRECAST CONCRETE SECTION8" PRECAST SEGMENTAL CONCRETE BLOCKTO TOP OF THE PIPE SHALL BE USEDWITH SIZE AND DEPTH PROHIBIT THEFABRICATION OF PRECAST UNITS.8" MINIMUM SLAB THICKNESS,6' MINIMUM DIAMETER PRECASTCONCRETE SLAB, REINFORCEDWITH #4 REBAR @ 8" E.W.GROUT BOTTOMWATERTIGHT CONNECTION(BOOT/GROUT RING, TYPICAL) DescriptionRev.DateUPPER 33RD STREETTOWNHOUSEDEVELOPMENTLAKE ELMO, MNSheet Title:Project #:Drawn By:Checked By:Issue Date:12226050TJRMJW01.06.233524 Labore RoadWhite Bear Lake, MN 55110651.481.9120 (f) 651.481.9201www.larsonengr.comC 2022 Larson Engineering, Inc. All rights reserved.P:\Projects\Projects - 2022\12226050 - Upper 33rd Street Townhouse Development (Element)\C. Design\Drawing Files\12226050 - C500 Details.dwgLarsonEngineering, Inc.Project Title:ELEMENTDESIGN-BUILD1110 RAYMOUND AVENUE, UNIT 3ST. PAUL, MN 55108Client:Matthew J. Woodruff, P.E.Date: Lic. No.:01.06.23I hereby certify that this plan,specifications or report was preparedby me or under my direct supervisionand that I am a duly licensedProfessional Engineer under the lawsof the state of Minnesota.PRELIMINARY NOT FOR CONSTRUCTIONSheet:DETAILSC501NOT TO SCALERESIDENTIAL DRIVEWAY DETAIL1C501SLOPETODRAINNYLOPLASTDUCTILEIRONPER PLANNOT TO SCALEINLINE DRAIN DETAIL (TURF)2C501NYLOPLAST PEDESTRIANMODEL H-10 GRATEDUCTILE IRON GRATENYLOPLAST 12" x 8"INLINE DRAIN8" PVC PIPETEE / ELBOWVARIABLE1'-4"VARIABLE4'-0" TYPICAL5"NOT TO SCALEMANHOLE DETAILOUTLET CONTROL STRUCTURE3C501SECTION8"PLANNEENAH R-1642, TYPE B LID(STMH, SOLID CLOSED, ROUND)MANHOLE STEPS SHALL BE PLACEDSO THAT OFFSET HOLE IN TOP SLABIS FACING DOWNSTREAM.NO BLOCK STRUCTURES ARE ALLOWEDMINIMUM OF 2, MAXIMUM OF 5CONCRETE ADJUSTMENT RINGS WITH FULLBED OF MORTAR BETWEEN EACH ANDA 4" COLLAR ON THE OUTSIDE. NO SHIMSOF ANY MATERIAL ALLOWED.INSTALL NEW EXTERNAL CHIMNEY SEAL.6" PRECAST REINFORCED CONCRETE SLAB.SEAL WITH 2 BEADS OF RAM-NEK.ALL JOINTS IN MANHOLE TO HAVE'O' RING RUBBER GASKETS.PRECAST INVERT SHOULD BE 1/2DIAMETER OF PIPE AND BENCHESSLOPED 2" TOWARD INVERT.MANHOLE STEPS, COPOLYMER POLYPROPYLENEPLASTIC, WITH 1/2" GRADE 60 STEELREINFORCEMENT OR EQUAL, 16" O.C.PRECAST CONCRETE SECTIONWEIR WALL(SEE DETAILS TO RIGHT)PIPE SHALL BE CUT OUT FLUSHWITH INSIDE FACE OF WALL.WATERTIGHT CONNECTION(BOOT/GROUT RING, TYPICAL)MINIMUM SLAB THICKNESS IS 6" FOR 14' DEPTH. INCREASETHICKNESS 1" FOR EVERY 4' OF DEPTH GREATER THAN 14',AND REINFORCE WITH #4 REBAR @ 8" E.W.TOP WEIR: 930.00INV: 927.75INV: 925.504" Ø ORIFICE3.5" Ø ORIFICESOUTH SYSTEMWEIR WALL DETAIL(NOT TO SCALE)TOP WEIR: 928.25INV: 927.00INV: 925.506" Ø ORIFICE3" Ø ORIFICENORTH SYSTEMWEIR WALL DETAIL(NOT TO SCALE)NOT TO SCALEPIPE STORAGE DETAILUNDERGROUND4C501BACKFILL WITH APPROVED ONSITE SOILSNON-PERFORATED PIPE(SIZE PER UTILITY PLAN) REF.REF.REF.REF.10'-0"10'-0"10'-0"GUEST PARKINGGUEST PARKING25'-0"175'-0"100'-0"MAIN ENTRY MAIN ENTRY5'-0"5'-0"5'-0"10'-0"9'-0"18'-0"9'-0"18'-0"1079 SF UNIT 4 1ST FLOOR 1079 SF UNIT 3 1ST FLOOR 1079 SF UNIT 2 1ST FLOOR 1079 SF UNIT 1 1ST FLOOR 498 SF 2 CAR GARAGE 498 SF 2 CAR GARAGE 498 SF 2 CAR GARAGE 498 SF 2 CAR GARAGE CONTENTS: SHEET NO: PROJECT NO:PROJECT:REVISIONS:PRELIMINARY- NOT FOR CONSTRUCTION A101 00-000Upper 33rd Cottages12 / 16 / 2022 1st Floor Plan Lake Elmo, MNNORTH SCALE:1/8" = 1'-0"1 1ST FLOOR DN DN DN DN 526 SF UNIT 4 2ND FLOOR 526 SF UNIT 3 2ND FLOOR 526 SF UNIT 2 2ND FLOOR 526 SF UNIT 1 2ND FLOOR ROOF BELOW ROOF BELOW ROOF BELOWROOF BELOWROOF BELOWROOF BELOWROOF BELOW ROOF BELOW CONTENTS: SHEET NO: PROJECT NO:PROJECT:REVISIONS:PRELIMINARY- NOT FOR CONSTRUCTION A102 00-000Upper 33rd Cottages12 / 16 / 2022 2nd Floor Plan Lake Elmo, MNNORTH SCALE:1/8" = 1'-0"1 2ND FLOOR 12 / 16 / 2022Upper 33rd Cottages View from SE SCALE:1 VIEW FROM SE 12 / 16 / 2022Upper 33rd Cottages View from South SCALE:1 VIEW FROM SOUTH 12 / 16 / 2022Upper 33rd Cottages 3d Views SCALE:1 VIEW FROM NW SCALE:2 ENTRY DETAIL 1ST FLOOR 0' -0" 2ND FLOOR 10' -1 1/8" 1ST FLOOR T.O.W. 9' -1 1/8" 2ND FLR T.O.W. 19' -2 1/4" MAIN ENTRY S1 S3 S1 S1S1 S1 S3 S3 S3 S3 S3 MAIN ENTRY 1ST FLOOR 0' -0" 2ND FLOOR 10' -1 1/8" 1ST FLOOR T.O.W. 9' -1 1/8" 2ND FLR T.O.W. 19' -2 1/4" METERS S1 S2 S3 12 / 16 / 2022Upper 33rd Cottages Elevations SCALE:3/32" = 1'-0"1 SOUTH ELEVATION SCALE:3/32" = 1'-0"2 EAST ELEVATION MATERIAL SCHEDULE Type Mark Description S1 Fiber Cement Board and Batten Siding S2 Fiber Cement Lap Siding S3 Fiber Cement Shake Siding 1ST FLOOR 0' -0" 2ND FLOOR 10' -1 1/8" 1ST FLOOR T.O.W. 9' -1 1/8" 2ND FLR T.O.W. 19' -2 1/4" S1 S1 S1 S2 S3 S2 S1 S2 S3 S2 1ST FLOOR 0' -0" 2ND FLOOR 10' -1 1/8" 1ST FLOOR T.O.W. 9' -1 1/8" 2ND FLR T.O.W. 19' -2 1/4" S1 S3 S2 SCALE:3/32" = 1'-0"1 NORTH ELEVATION MATERIAL SCHEDULE Type Mark Description S1 Fiber Cement Board and Batten Siding S2 Fiber Cement Lap Siding S3 Fiber Cement Shake Siding 12 / 16 / 2022Upper 33rd Cottages Elevations SCALE:3/32" = 1'-0"2 WEST ELEVATION UPPER 33RD STREET TOWNHOUSE DEVELOPMENT STORMWATER CALCULATIONS BY LARSON ENGINEERING NOVEMBER 3, 2022 DECEMBER 28, 2022 CONTENTS: 1. Stormwater Runoff Summary 2. Existing Drainage Map 3. HydroCAD Report for Existing Conditions (2-yr, 10-yr, and 100-yr events and 100-yr 10-day snowmelt) 4. Proposed Drainage Map 5. HydroCAD Report for Proposed Conditions (2-yr, 10-yr, and 100-yr events and 100-yr 10-day snowmelt) December 28, 2022 T.J. Rose, P.E. Date Registration No. Upper 33rd Street Townhouse Development SUMMARY OF STORMWATER RUNOFF Introduction: This project will consist of the construction of a new 4-unit townhouse, two shared driveways, and associated stormwater utilities. Stormwater calculations were modeled using HydroCAD with Atlas 14 24-hour rainfall data. Existing Conditions: The existing site is an open grass residential lot. Runoff is generally from south to north across the site. To the north of the site is a grass lot. Per the LIDAR contours shown on MnTopo, it appears the grass lot to the north may be landlocked, as it is unclear where this lot ultimately drains. The existing conditions were modeled as >75% Grass Cover, Type D soils, with a Curve Number of 80. There are no existing impervious surfaces. Proposed Conditions: The runoff from the proposed site will be routed to an underground pipe infiltration system. The pipe infiltration system will outlet into the storm sewer in 33rd St. Per Valley Branch Watershed District (VBWD) standards, the runoff rate in the proposed conditions must not exceed the runoff rate in the existing conditions for the 2-, 10-, and 100-year 24-hour storms, as well as the 7.2-inch 100-year 10-day snow melt event, for all points where discharge leaves the site. The existing and proposed peak runoff rates leaving the site are listed in the table below. Existing peak runoff rates (in cubic feet per second): Area 2-year 10-year 100-year 100-yr, 10-day Runoff North 0.57 1.17 2.59 0.19 Runoff South 0.00 0.00 0.00 0.00 Total Runoff 0.57 1.17 2.59 0.19 Proposed peak runoff rates (in cubic feet per second): Area 2-year 10-year 100-year 100-yr, 10-day Runoff North 0.00 0.00 0.00 0.00 Runoff South 0.56 0.90 2.51 0.19 Total Runoff 0.56 0.90 2.51 0.19 Since all of the existing runoff is directed towards the north, and the proposed underground system is discharging into the storm sewer in 33rd St, the runoff rates to the south are increasing. However, the total rates leaving the site have been reduced. We feel this is a better design than sending the proposed drainage to the north into the neighboring yard, where it can potentially be directed to a landlocked area. Water Quality Summary Per VBWD standards, a volume of runoff equivalent to 1.1” over the new and reconstructed impervious surfaces must be infiltrated. Due to the presence of Type D soils, infiltration is not feasible. In order to satisfy the volume requirement, credits will be purchased from the City of Lake Elmo for the use of their regional infiltration facility and to satisfy the requirements of the VBWD. Total New/Reconstructed Impervious = 10,056 SF Total Required Infiltration = 10,056 x 1.1” ÷ 12” = 922 CF PROPOS E D 8 " D I P PROPOS E D 8 " S A N I T A R Y PROPO S E D 1 5 " R C P PROPOS E D C B TC=93 3 . 0 6 INV=9 2 4 . 2 3 UPPER 3 3 R D S T R E E T N . A Larson Engineering, Inc.EXISTING DRAINAGE MAP A 2R Offsite North Routing Diagram for Upper 33rd - Existing Prepared by Larson Engineering Of MN, Printed 12/28/2022 HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 2HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Rainfall Events Listing Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 2-Year MSE 24-hr 3 Default 24.00 1 2.80 2 2 10-Year MSE 24-hr 3 Default 24.00 1 4.20 2 3 100-Year MSE 24-hr 3 Default 24.00 1 7.30 2 4 100-yr, 10-day Spillway 1-day 10-day Default 240.00 1 7.20 4 Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 3HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 17,500 80 >75% Grass cover, Good, HSG D (A) 17,500 80 TOTAL AREA MSE 24-hr 3 2-Year Rainfall=2.80"Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 4HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment A: Runoff = 0.57 cfs @ 12.24 hrs, Volume= 1,607 cf, Depth= 1.10" Routed to Reach 2R : Offsite North Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 2-Year Rainfall=2.80" Area (sf) CN Description 17,500 80 >75% Grass cover, Good, HSG D 17,500 80 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 100 0.0220 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.83" MSE 24-hr 3 2-Year Rainfall=2.80"Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 5HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 2R: Offsite North Inflow Area = 17,500 sf, 0.00% Impervious, Inflow Depth = 1.10" for 2-Year event Inflow = 0.57 cfs @ 12.24 hrs, Volume= 1,607 cf Outflow = 0.57 cfs @ 12.24 hrs, Volume= 1,607 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 10-Year Rainfall=4.20"Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 6HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment A: Runoff = 1.17 cfs @ 12.23 hrs, Volume= 3,220 cf, Depth= 2.21" Routed to Reach 2R : Offsite North Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 10-Year Rainfall=4.20" Area (sf) CN Description 17,500 80 >75% Grass cover, Good, HSG D 17,500 80 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 100 0.0220 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.83" MSE 24-hr 3 10-Year Rainfall=4.20"Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 7HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 2R: Offsite North Inflow Area = 17,500 sf, 0.00% Impervious, Inflow Depth = 2.21" for 10-Year event Inflow = 1.17 cfs @ 12.23 hrs, Volume= 3,220 cf Outflow = 1.17 cfs @ 12.23 hrs, Volume= 3,220 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 100-Year Rainfall=7.30"Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 8HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment A: Runoff = 2.59 cfs @ 12.22 hrs, Volume= 7,251 cf, Depth= 4.97" Routed to Reach 2R : Offsite North Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 100-Year Rainfall=7.30" Area (sf) CN Description 17,500 80 >75% Grass cover, Good, HSG D 17,500 80 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 100 0.0220 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.83" MSE 24-hr 3 100-Year Rainfall=7.30"Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 9HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 2R: Offsite North Inflow Area = 17,500 sf, 0.00% Impervious, Inflow Depth = 4.97" for 100-Year event Inflow = 2.59 cfs @ 12.22 hrs, Volume= 7,251 cf Outflow = 2.59 cfs @ 12.22 hrs, Volume= 7,251 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 10HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment A: Runoff = 0.19 cfs @ 121.42 hrs, Volume= 10,151 cf, Depth= 6.96" Routed to Reach 2R : Offsite North Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4 Area (sf) CN Adj Description 17,500 80 >75% Grass cover, Good, HSG D 17,500 80 98 Weighted Average, AMC Adjusted 17,500 80 98 100.00% Pervious Area, AMC Adjusted Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 100 0.0220 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.83" Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4Upper 33rd - Existing Printed 12/28/2022Prepared by Larson Engineering Of MN Page 11HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 2R: Offsite North Inflow Area = 17,500 sf, 0.00% Impervious, Inflow Depth = 6.96" for 100-yr, 10-day event Inflow = 0.19 cfs @ 121.42 hrs, Volume= 10,151 cf Outflow = 0.19 cfs @ 121.42 hrs, Volume= 10,151 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs PROPOS E D 8 " D I P PROPOS E D 8 " S A N I T A R Y PROPO S E D 1 5 " R C P PROPOS E D C B TC=93 3 . 0 6 INV=9 2 4 . 2 3 UPPER 3 3 R D S T R E E T N . PROPO S E D 4-UNIT T O W N H O M E FFE = 9 3 3 . 0 0 GFE = 9 3 2 . 5 0 GARAG E GARAG E GARAG E GARAG E 932931932 932 932 932 931 930 932 931 930 932 931 930 9329315' 5'10'10' 5'5' B C Larson Engineering, Inc.PROPOSED DRAINAGE MAP B C 1R Offsite South 2R Total Runoff 4P South System 5P North System Routing Diagram for Upper 33rd - Proposed Prepared by Larson Engineering Of MN, Printed 12/28/2022 HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Subcat Reach Pond Link Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 2HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Rainfall Events Listing Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 2-Year MSE 24-hr 3 Default 24.00 1 2.80 2 2 10-Year MSE 24-hr 3 Default 24.00 1 4.20 2 3 100-Year MSE 24-hr 3 Default 24.00 1 7.30 2 4 100-yr, 10-day Spillway 1-day 10-day Default 240.00 1 7.20 4 Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 3HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 7,444 61 >75% Grass cover, Good, HSG B (B, C) 10,056 98 Proposed Impervious (B, C) 17,500 82 TOTAL AREA MSE 24-hr 3 2-Year Rainfall=2.80"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 4HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment B: Runoff = 0.43 cfs @ 12.13 hrs, Volume= 1,011 cf, Depth= 1.54" Routed to Pond 4P : South System Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 2-Year Rainfall=2.80" Area (sf) CN Description * 4,314 98 Proposed Impervious 3,587 61 >75% Grass cover, Good, HSG B 7,901 81 Weighted Average 3,587 61 45.40% Pervious Area 4,314 98 54.60% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, MSE 24-hr 3 2-Year Rainfall=2.80"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 5HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment C: Runoff = 0.56 cfs @ 12.14 hrs, Volume= 1,323 cf, Depth= 1.65" Routed to Pond 5P : North System Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 2-Year Rainfall=2.80" Area (sf) CN Description * 5,742 98 Proposed Impervious 3,857 61 >75% Grass cover, Good, HSG B 9,599 83 Weighted Average 3,857 61 40.18% Pervious Area 5,742 98 59.82% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.6 25 0.0100 0.06 Sheet Flow, Grass: Dense n= 0.240 P2= 2.83" MSE 24-hr 3 2-Year Rainfall=2.80"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 6HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 1R: Offsite South Inflow Area = 17,500 sf, 57.46% Impervious, Inflow Depth = 1.60" for 2-Year event Inflow = 0.56 cfs @ 12.18 hrs, Volume= 2,334 cf Outflow = 0.56 cfs @ 12.18 hrs, Volume= 2,334 cf, Atten= 0%, Lag= 0.0 min Routed to Reach 2R : Total Runoff Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 2-Year Rainfall=2.80"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 7HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 2R: Total Runoff Inflow Area = 17,500 sf, 57.46% Impervious, Inflow Depth = 1.60" for 2-Year event Inflow = 0.56 cfs @ 12.18 hrs, Volume= 2,334 cf Outflow = 0.56 cfs @ 12.18 hrs, Volume= 2,334 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 2-Year Rainfall=2.80"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 8HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4P: South System Inflow Area = 7,901 sf, 54.60% Impervious, Inflow Depth = 1.54" for 2-Year event Inflow = 0.43 cfs @ 12.13 hrs, Volume= 1,011 cf Outflow = 0.35 cfs @ 12.17 hrs, Volume= 1,011 cf, Atten= 19%, Lag= 2.5 min Primary = 0.35 cfs @ 12.17 hrs, Volume= 1,011 cf Routed to Reach 1R : Offsite South Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Peak Elev= 926.35' @ 12.17 hrs Surf.Area= 98 sf Storage= 59 cf Plug-Flow detention time= 2.0 min calculated for 1,011 cf (100% of inflow) Center-of-Mass det. time= 2.0 min ( 767.4 - 765.3 ) Volume Invert Avail.Storage Storage Description #1 925.50' 377 cf 48.0" Round Pipe Storage L= 30.0' Device Routing Invert Outlet Devices #1 Primary 925.50'12.0" Round Culvert L= 73.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 925.50' / 924.70' S= 0.0110 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf #2 Device 1 929.25'4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Device 1 927.25'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 925.50'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.35 cfs @ 12.17 hrs HW=926.35' TW=0.00' (Dynamic Tailwater) 1=Culvert (Passes 0.35 cfs of 2.24 cfs potential flow) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate ( Controls 0.00 cfs) 4=Orifice/Grate (Orifice Controls 0.35 cfs @ 3.98 fps) MSE 24-hr 3 2-Year Rainfall=2.80"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 9HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5P: North System Inflow Area = 9,599 sf, 59.82% Impervious, Inflow Depth = 1.65" for 2-Year event Inflow = 0.56 cfs @ 12.14 hrs, Volume= 1,323 cf Outflow = 0.23 cfs @ 12.26 hrs, Volume= 1,323 cf, Atten= 59%, Lag= 7.5 min Primary = 0.23 cfs @ 12.26 hrs, Volume= 1,323 cf Routed to Reach 1R : Offsite South Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Peak Elev= 926.55' @ 12.26 hrs Surf.Area= 344 sf Storage= 266 cf Plug-Flow detention time= 11.3 min calculated for 1,323 cf (100% of inflow) Center-of-Mass det. time= 11.9 min ( 775.8 - 763.9 ) Volume Invert Avail.Storage Storage Description #1 925.50' 848 cf 36.0" Round Pipe Storage L= 120.0' Device Routing Invert Outlet Devices #1 Primary 925.50'12.0" Round Culvert L= 78.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 925.50' / 924.70' S= 0.0103 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf #2 Device 1 928.25'4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Device 1 927.00'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 925.50'3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.23 cfs @ 12.26 hrs HW=926.55' TW=0.00' (Dynamic Tailwater) 1=Culvert (Passes 0.23 cfs of 2.81 cfs potential flow) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate ( Controls 0.00 cfs) 4=Orifice/Grate (Orifice Controls 0.23 cfs @ 4.64 fps) MSE 24-hr 3 10-Year Rainfall=4.20"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 10HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment B: Runoff = 0.75 cfs @ 12.13 hrs, Volume= 1,699 cf, Depth= 2.58" Routed to Pond 4P : South System Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 10-Year Rainfall=4.20" Area (sf) CN Description * 4,314 98 Proposed Impervious 3,587 61 >75% Grass cover, Good, HSG B 7,901 81 Weighted Average 3,587 61 45.40% Pervious Area 4,314 98 54.60% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, MSE 24-hr 3 10-Year Rainfall=4.20"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 11HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment C: Runoff = 0.94 cfs @ 12.14 hrs, Volume= 2,192 cf, Depth= 2.74" Routed to Pond 5P : North System Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 10-Year Rainfall=4.20" Area (sf) CN Description * 5,742 98 Proposed Impervious 3,857 61 >75% Grass cover, Good, HSG B 9,599 83 Weighted Average 3,857 61 40.18% Pervious Area 5,742 98 59.82% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.6 25 0.0100 0.06 Sheet Flow, Grass: Dense n= 0.240 P2= 2.83" MSE 24-hr 3 10-Year Rainfall=4.20"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 12HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 1R: Offsite South Inflow Area = 17,500 sf, 57.46% Impervious, Inflow Depth = 2.67" for 10-Year event Inflow = 0.90 cfs @ 12.23 hrs, Volume= 3,891 cf Outflow = 0.90 cfs @ 12.23 hrs, Volume= 3,891 cf, Atten= 0%, Lag= 0.0 min Routed to Reach 2R : Total Runoff Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 10-Year Rainfall=4.20"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 13HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 2R: Total Runoff Inflow Area = 17,500 sf, 57.46% Impervious, Inflow Depth = 2.67" for 10-Year event Inflow = 0.90 cfs @ 12.23 hrs, Volume= 3,891 cf Outflow = 0.90 cfs @ 12.23 hrs, Volume= 3,891 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 10-Year Rainfall=4.20"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 14HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4P: South System Inflow Area = 7,901 sf, 54.60% Impervious, Inflow Depth = 2.58" for 10-Year event Inflow = 0.75 cfs @ 12.13 hrs, Volume= 1,699 cf Outflow = 0.51 cfs @ 12.19 hrs, Volume= 1,699 cf, Atten= 31%, Lag= 3.4 min Primary = 0.51 cfs @ 12.19 hrs, Volume= 1,699 cf Routed to Reach 1R : Offsite South Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Peak Elev= 927.17' @ 12.19 hrs Surf.Area= 118 sf Storage= 149 cf Plug-Flow detention time= 2.5 min calculated for 1,699 cf (100% of inflow) Center-of-Mass det. time= 2.5 min ( 766.0 - 763.6 ) Volume Invert Avail.Storage Storage Description #1 925.50' 377 cf 48.0" Round Pipe Storage L= 30.0' Device Routing Invert Outlet Devices #1 Primary 925.50'12.0" Round Culvert L= 73.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 925.50' / 924.70' S= 0.0110 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf #2 Device 1 929.25'4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Device 1 927.25'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 925.50'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.51 cfs @ 12.19 hrs HW=927.16' TW=0.00' (Dynamic Tailwater) 1=Culvert (Passes 0.51 cfs of 3.92 cfs potential flow) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate ( Controls 0.00 cfs) 4=Orifice/Grate (Orifice Controls 0.51 cfs @ 5.89 fps) MSE 24-hr 3 10-Year Rainfall=4.20"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 15HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5P: North System Inflow Area = 9,599 sf, 59.82% Impervious, Inflow Depth = 2.74" for 10-Year event Inflow = 0.94 cfs @ 12.14 hrs, Volume= 2,192 cf Outflow = 0.41 cfs @ 12.25 hrs, Volume= 2,192 cf, Atten= 56%, Lag= 6.8 min Primary = 0.41 cfs @ 12.25 hrs, Volume= 2,192 cf Routed to Reach 1R : Offsite South Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Peak Elev= 927.20' @ 12.25 hrs Surf.Area= 357 sf Storage= 497 cf Plug-Flow detention time= 14.1 min calculated for 2,191 cf (100% of inflow) Center-of-Mass det. time= 14.4 min ( 775.9 - 761.5 ) Volume Invert Avail.Storage Storage Description #1 925.50' 848 cf 36.0" Round Pipe Storage L= 120.0' Device Routing Invert Outlet Devices #1 Primary 925.50'12.0" Round Culvert L= 78.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 925.50' / 924.70' S= 0.0103 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf #2 Device 1 928.25'4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Device 1 927.00'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 925.50'3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.41 cfs @ 12.25 hrs HW=927.20' TW=0.00' (Dynamic Tailwater) 1=Culvert (Passes 0.41 cfs of 3.89 cfs potential flow) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.12 cfs @ 1.54 fps) 4=Orifice/Grate (Orifice Controls 0.30 cfs @ 6.05 fps) MSE 24-hr 3 100-Year Rainfall=7.30"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 16HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment B: Runoff = 1.53 cfs @ 12.13 hrs, Volume= 3,411 cf, Depth= 5.18" Routed to Pond 4P : South System Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 100-Year Rainfall=7.30" Area (sf) CN Description * 4,314 98 Proposed Impervious 3,587 61 >75% Grass cover, Good, HSG B 7,901 81 Weighted Average 3,587 61 45.40% Pervious Area 4,314 98 54.60% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, MSE 24-hr 3 100-Year Rainfall=7.30"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 17HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment C: Runoff = 1.88 cfs @ 12.14 hrs, Volume= 4,317 cf, Depth= 5.40" Routed to Pond 5P : North System Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 100-Year Rainfall=7.30" Area (sf) CN Description * 5,742 98 Proposed Impervious 3,857 61 >75% Grass cover, Good, HSG B 9,599 83 Weighted Average 3,857 61 40.18% Pervious Area 5,742 98 59.82% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.6 25 0.0100 0.06 Sheet Flow, Grass: Dense n= 0.240 P2= 2.83" MSE 24-hr 3 100-Year Rainfall=7.30"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 18HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 1R: Offsite South Inflow Area = 17,500 sf, 57.46% Impervious, Inflow Depth = 5.30" for 100-Year event Inflow = 2.51 cfs @ 12.18 hrs, Volume= 7,729 cf Outflow = 2.51 cfs @ 12.18 hrs, Volume= 7,729 cf, Atten= 0%, Lag= 0.0 min Routed to Reach 2R : Total Runoff Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 100-Year Rainfall=7.30"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 19HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 2R: Total Runoff Inflow Area = 17,500 sf, 57.46% Impervious, Inflow Depth = 5.30" for 100-Year event Inflow = 2.51 cfs @ 12.18 hrs, Volume= 7,729 cf Outflow = 2.51 cfs @ 12.18 hrs, Volume= 7,729 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs MSE 24-hr 3 100-Year Rainfall=7.30"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 20HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4P: South System Inflow Area = 7,901 sf, 54.60% Impervious, Inflow Depth = 5.18" for 100-Year event Inflow = 1.53 cfs @ 12.13 hrs, Volume= 3,411 cf Outflow = 1.21 cfs @ 12.17 hrs, Volume= 3,411 cf, Atten= 21%, Lag= 2.6 min Primary = 1.21 cfs @ 12.17 hrs, Volume= 3,411 cf Routed to Reach 1R : Offsite South Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Peak Elev= 928.71' @ 12.17 hrs Surf.Area= 95 sf Storage= 325 cf Plug-Flow detention time= 2.8 min calculated for 3,411 cf (100% of inflow) Center-of-Mass det. time= 2.8 min ( 763.4 - 760.6 ) Volume Invert Avail.Storage Storage Description #1 925.50' 377 cf 48.0" Round Pipe Storage L= 30.0' Device Routing Invert Outlet Devices #1 Primary 925.50'12.0" Round Culvert L= 73.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 925.50' / 924.70' S= 0.0110 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf #2 Device 1 929.25'4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Device 1 927.25'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 925.50'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=1.21 cfs @ 12.17 hrs HW=928.71' TW=0.00' (Dynamic Tailwater) 1=Culvert (Passes 1.21 cfs of 5.61 cfs potential flow) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.48 cfs @ 5.47 fps) 4=Orifice/Grate (Orifice Controls 0.73 cfs @ 8.40 fps) MSE 24-hr 3 100-Year Rainfall=7.30"Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 21HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5P: North System Inflow Area = 9,599 sf, 59.82% Impervious, Inflow Depth = 5.40" for 100-Year event Inflow = 1.88 cfs @ 12.14 hrs, Volume= 4,317 cf Outflow = 1.32 cfs @ 12.20 hrs, Volume= 4,317 cf, Atten= 30%, Lag= 3.5 min Primary = 1.32 cfs @ 12.20 hrs, Volume= 4,317 cf Routed to Reach 1R : Offsite South Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Peak Elev= 928.23' @ 12.20 hrs Surf.Area= 207 sf Storage= 810 cf Plug-Flow detention time= 12.5 min calculated for 4,317 cf (100% of inflow) Center-of-Mass det. time= 12.6 min ( 770.8 - 758.1 ) Volume Invert Avail.Storage Storage Description #1 925.50' 848 cf 36.0" Round Pipe Storage L= 120.0' Device Routing Invert Outlet Devices #1 Primary 925.50'12.0" Round Culvert L= 78.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 925.50' / 924.70' S= 0.0103 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf #2 Device 1 928.25'4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Device 1 927.00'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 925.50'3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=1.31 cfs @ 12.20 hrs HW=928.22' TW=0.00' (Dynamic Tailwater) 1=Culvert (Passes 1.31 cfs of 5.04 cfs potential flow) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate (Orifice Controls 0.93 cfs @ 4.75 fps) 4=Orifice/Grate (Orifice Controls 0.38 cfs @ 7.76 fps) Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 22HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment B: Runoff = 0.09 cfs @ 121.30 hrs, Volume= 4,583 cf, Depth= 6.96" Routed to Pond 4P : South System Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4 Area (sf) CN Adj Description * 4,314 98 Proposed Impervious 3,587 61 >75% Grass cover, Good, HSG B 7,901 81 98 Weighted Average, AMC Adjusted 3,587 61 98 45.40% Pervious Area, AMC Adjusted 4,314 98 98 54.60% Impervious Area, AMC Adjusted Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 23HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Subcatchment C: Runoff = 0.11 cfs @ 121.30 hrs, Volume= 5,568 cf, Depth= 6.96" Routed to Pond 5P : North System Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4 Area (sf) CN Adj Description * 5,742 98 Proposed Impervious 3,857 61 >75% Grass cover, Good, HSG B 9,599 83 98 Weighted Average, AMC Adjusted 3,857 61 98 40.18% Pervious Area, AMC Adjusted 5,742 98 98 59.82% Impervious Area, AMC Adjusted Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.6 25 0.0100 0.06 Sheet Flow, Grass: Dense n= 0.240 P2= 2.83" Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 24HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 1R: Offsite South Inflow Area = 17,500 sf, 57.46% Impervious, Inflow Depth = 6.96" for 100-yr, 10-day event Inflow = 0.19 cfs @ 121.37 hrs, Volume= 10,151 cf Outflow = 0.19 cfs @ 121.37 hrs, Volume= 10,151 cf, Atten= 0%, Lag= 0.0 min Routed to Reach 2R : Total Runoff Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 25HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Reach 2R: Total Runoff Inflow Area = 17,500 sf, 57.46% Impervious, Inflow Depth = 6.96" for 100-yr, 10-day event Inflow = 0.19 cfs @ 121.37 hrs, Volume= 10,151 cf Outflow = 0.19 cfs @ 121.37 hrs, Volume= 10,151 cf, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 26HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Pond 4P: South System Inflow Area = 7,901 sf, 54.60% Impervious, Inflow Depth = 6.96" for 100-yr, 10-day event Inflow = 0.09 cfs @ 121.30 hrs, Volume= 4,583 cf Outflow = 0.09 cfs @ 121.32 hrs, Volume= 4,583 cf, Atten= 0%, Lag= 1.2 min Primary = 0.09 cfs @ 121.32 hrs, Volume= 4,583 cf Routed to Reach 1R : Offsite South Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Peak Elev= 925.71' @ 121.32 hrs Surf.Area= 53 sf Storage= 7 cf Plug-Flow detention time= 2.3 min calculated for 4,583 cf (100% of inflow) Center-of-Mass det. time= 2.3 min ( 7,412.2 - 7,409.9 ) Volume Invert Avail.Storage Storage Description #1 925.50' 377 cf 48.0" Round Pipe Storage L= 30.0' Device Routing Invert Outlet Devices #1 Primary 925.50'12.0" Round Culvert L= 73.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 925.50' / 924.70' S= 0.0110 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf #2 Device 1 929.25'4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Device 1 927.25'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 925.50'4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.09 cfs @ 121.32 hrs HW=925.71' TW=0.00' (Dynamic Tailwater) 1=Culvert (Passes 0.09 cfs of 0.18 cfs potential flow) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate ( Controls 0.00 cfs) 4=Orifice/Grate (Orifice Controls 0.09 cfs @ 1.54 fps) Spillway 1-day 10-day 100-yr, 10-day Rainfall=7.20", AMC=4Upper 33rd - Proposed Printed 12/28/2022Prepared by Larson Engineering Of MN Page 27HydroCAD® 10.20-2f s/n 01934 © 2022 HydroCAD Software Solutions LLC Summary for Pond 5P: North System Inflow Area = 9,599 sf, 59.82% Impervious, Inflow Depth = 6.96" for 100-yr, 10-day event Inflow = 0.11 cfs @ 121.30 hrs, Volume= 5,568 cf Outflow = 0.10 cfs @ 121.47 hrs, Volume= 5,568 cf, Atten= 3%, Lag= 10.2 min Primary = 0.10 cfs @ 121.47 hrs, Volume= 5,568 cf Routed to Reach 1R : Offsite South Routing by Dyn-Stor-Ind method, Time Span= 0.00-260.00 hrs, dt= 0.01 hrs Peak Elev= 925.81' @ 121.47 hrs Surf.Area= 220 sf Storage= 47 cf Plug-Flow detention time= 8.8 min calculated for 5,568 cf (100% of inflow) Center-of-Mass det. time= 8.8 min ( 7,419.3 - 7,410.5 ) Volume Invert Avail.Storage Storage Description #1 925.50' 848 cf 36.0" Round Pipe Storage L= 120.0' Device Routing Invert Outlet Devices #1 Primary 925.50'12.0" Round Culvert L= 78.0' CPP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 925.50' / 924.70' S= 0.0103 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf #2 Device 1 928.25'4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #3 Device 1 927.00'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #4 Device 1 925.50'3.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.10 cfs @ 121.47 hrs HW=925.81' TW=0.00' (Dynamic Tailwater) 1=Culvert (Passes 0.10 cfs of 0.40 cfs potential flow) 2=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) 3=Orifice/Grate ( Controls 0.00 cfs) 4=Orifice/Grate (Orifice Controls 0.10 cfs @ 2.08 fps)     PAGE 1 of 2  MEMORANDUM         Date:  January 9, 2023        To:  Sophia Jensen, City Planner  Re:  Upper 33rd Street North Townhouse CUP  Cc:  Marty Powers, Public Works Director    Site Plan review    Chad Isakson, PE, Assistant City Engineer    PID 1302921320052 & 1302921320051  From:  Jack Griffin, PE, City Engineer          Engineering has reviewed the revised Upper 33rd Street North Townhouse CUP Site Plans received on January 3,  2022. The review consisted of the following documentation:   Civil Site Plans dated January 3, 2022.   Stormwater Calculations dated January 3, 2022.      STATUS/FINDINGS:   Engineering review comments have been provided in two separate memos; one for the CUP‐ Site Plan approval, and one to assist with the completion of the final Construction Plans.  Please see the following  review comments relating to the CUP‐Site Plan application.      1. City  approvals  must  be  contingent  upon  the  applicant  revising  the  Final  Construction  Plans  and  Stormwater  Management  Plan  as  required  by  the  City  Engineer.  Final  Construction  Plans  and  Specifications must be prepared in accordance with the latest version of the City Engineering Design  Standards Manual, dated January 2022, using City details, plan notes and specifications and meeting City  Engineering Design Guidelines and plan format requirements.  2. No construction on the Project may begin until the applicant has received City Engineer approval for the  Final Construction Plans; the applicant has obtained and submitted to the City all applicable permits,  easements and permissions needed for the project; and a preconstruction meeting has been held by the  City’s engineering department. All off‐site permanent or temporary construction easements required to  construct  the  project  must  be  shown  on  the  plans  and  must  be  provided  prior  to  scheduling  a  preconstruction meeting.  3. Site Access. The proposed townhomes, including all four units, would access Upper 33rd Street North.  Upper 33rd Street North is a local residential street, 24‐feet wide within a 47‐ft wide right‐of‐way. The  street width and right‐of‐way do not meet minimum city standards (minimum 28‐ft wide within 60‐ft  right‐of‐way). The street was recently reconstructed but maintained its existing width and right‐of‐way  due to site constraints. Access is proposed using 2 shared driveways, each at 22‐feet wide.  4. On‐street Parking. At 24‐feet‐wide, no on‐street parking is available along Upper 33rd Street North. The  street is designated as no parking along both sides. All parking requirements must be met with all parking  contained on the property.  5. Pedestrian Connectivity. No sidewalk or trail currently exists along Upper 33rd Street. Due to the narrow  street width (24‐feet) pedestrian use of the paved roadway may be hazardous once Upper 33rd Street  connects to the future development of Schiltgen Farms.  6. Drainage  and  Utility  Easements.  A  10‐ft.  drainage  and  utility  easement  must  be  provided  along  the  property frontage to allow for future placement and relocation of  small/dry  utilities.  Minimum  lot  FOCUS ENGINEERING, inc.  Cara Geheren, P.E.   651.300.4261  Jack Griffin, P.E.                651.300.4264  Ryan Stempski, P.E.  651.300.4267  Chad Isakson, P.E.  651.300.4285      PAGE 2 of 2  easements should also be provided along the side and rear property lines. All easement areas must be  free from all encroachments other than those approved by the City Engineer and upon execution of an  easement  encroachment  agreement.  Prohibited  encroachments  include, but are not limited to  trees,  landscaping, fences, retaining walls, and building structures.  7. Existing conditions plan remains significantly incomplete. Existing conditions is required for a minimum  distance  of  150‐feet  from  the  proposed  parcel  and  from  any  off‐site  improvements.  A  detailed  construction plan review cannot be completed until the existing condition information is provided on the  site, grading and utility plans to demonstrate how the site layout connects to the surrounding existing  conditions. Existing conditions must include all topographic features, contours, and spot elevations for all  design  critical  locations.  Spot  elevations  are  required  at  a  minimum  along  all  lot  lines,  including  lot  corners, and along the existing curb of Upper 33rd Street.   8. Site grading must be revised to meet all city minimum and maximum allowable grades. The right‐of‐way  boulevard must be a minimum 4% grade and all other site grades must be a minimum of 2% grade. Rear  yard grades must be labeled 3:1 maximum.  9. Site  grading  must  be  revised  to  show  the  100‐year  HWL  storm  event  elevation  (and  100‐year  HWL  contour) for all low points on the site. The grading plans must also show all discharge locations from the  property, including emergency overland overflow locations and EOF elevations. The grading plans must be  revised, as may be required, to meet city design standards for flood protection, requiring 2‐feet of vertical  separation to all adjacent building low floor elevations from any low area 100‐year HWL, and requiring 1‐ foot of vertical separation from any emergency overflow elevation to all adjacent building low opening  elevations.  10. The proposed site plan is subject to a storm water management plan (SWMP) meeting State, Valley  Branch Watershed District (VBWD) and city rules.  The proposed stormwater management plan proposes  an  underground  storm  water  storage  chamber(s)  to  provide  rate  control to reduce storm water  discharges from the site. The plan proposes to discharge runoff to the south through a connection to the  existing city storm sewer system along Upper 33rd Street.  11. In order to comply with VBWD and city rules, the applicant is requesting to divert stormwater runoff that  currenting  discharges  north  from  the  property,  and  to  proposed southerly  discharge  location.  This  stormwater diversion has been found to be acceptable to the city.  12. The soils investigations performed on the site determined that infiltration is not feasible. Therefore, the  developer intends to purchase credits from Lake Elmo’s Downtown Regional Infiltration Basin Volume  Control credit bank to meet volume control requirements. The 2023 Fee for the Regional Infiltration Basin  Volume Control Use Charge is $0.70 per square feet of impervious  surface.  The  VBWD  permit  is  contingent upon the applicant providing proof that the credits have been obtained from Lake Elmo.  13. The storm water management facilities constructed for this development will be privately owned and  maintained. The applicant will be required to execute and record  a  Stormwater  Maintenance  and  Easement Agreement in the City’s standard form of agreement. The stormwater drainage and utility  easements must be shown on the site plans, utility plans and grading plans. A Homeowner’s association  would  be  required  for  the  development  to  provide  for  the  ongoing  ownership  and  maintenance  responsibilities.   14. Municipal water supply is available to the site. There are four (4) existing water service stubs available  along the frontage of the property to provide an individual water service connection for each townhome.  Connections to existing public watermain will be required, including all connection and permit fees.  15. Sanitary sewer service is available to the site. There are four (4) existing sanitary sewer service stubs  available along the frontage of the property to provide an individual sewer service connection for each  townhome. Connections to existing sewer will be required, including all connection and permit fees.  “Proudly Serving Neighbors & Friends” Lake Elmo Fire Department Memorandum To: Ben Hetzel, City Planner From: Dustin Kalis, Fire Chief Date: 11/8/22 Re: Conditional Use Permit: Upper 33rd Street - 4 Unit Townhome _______________________________________________________________________________________ The Lake Elmo Fire Department has completed a Conditional Use Permit review for Upper 33rd Street - 4 Unit Townhome (PIDs 1302921320052 and 1302921320051) based on submittals dated 10/28/22 with the following comments: 1) The fire sprinkler system shall be installed compliant with provisions of 2016 NFPA Standard 13D, Installation of Sprinkler Systems in One- and Two-Family Dwellings or IRC P2904. City permit required prior to initiation of work. 2) Building address numbers shall be plainly visible from the street fronting the property and shall be a contrasting color from the background. Size and placement of address numbers shall be approved by the fire and planning departments. Codes and Standards Used for this Review This review is based on the following codes and standards as adopted and in effect in the State of Minnesota at the time of plan submittal.  2020 Minnesota State Fire Code  2020 Minnesota Residential Code  Lake Elmo Fire Department Fire Code Policy  NFPA 13D, 2016 edition • o • o o o • Site Measurement Code Required Proposed Street Frontage (LF) Required Street Frontage Trees (1 per 50 LF) Development or Disturbed Area (Acres) Required Development Trees (5 per Acre) Screening Perimeter between Land Uses (LF) Required Perimeter Screening Trees (1 per 40 LF) Required Mitigation Trees Required Number of Trees Quantity % Composition Requirement Deciduous Shade Trees Coniferous Trees Ornamental Trees Tree Count