HomeMy WebLinkAbout08-02-94 CCMAugust 3, 1994
To: Lake Elmo City Council
For the purpose of discussing Sanitary Sewer options for I.94, I hereby call a Special
Meeting of the Lake Elmo City Council for Tuesday, August 9,1994, at 8:00 p.m. in the
Coon Il Chambers, 00 Laverne Avenue North,
Wyn John, yor
Lake Elmo City Council
August 9,1994
AGENDA
8:00 P.M. Special Meeting Convenes
1. Discussion of Sanitary Sewer Options for I-94
2. Discussion of Finance Options for I.94 Sanitary Sewer
3. Adjourn
Budget Meeting Convenes (Special Meeting Called by
City Council on July 19,1994)
1. Discussion with Fire Department on 1995 Budget
2. Discussion of other Budget Items
3. Adjourn
MINUTES APPROVED: 8-16-94
LAKE ELMO CITY COUNCIL MINUTES
AUGUST 2, 1994
6:00 p.m. BUDGET WORKSHOP
Mayor John called the council meeting to order at 7:05 p.m. in the council chambers.
PRESENT: Mottaz (arrived 7:10 p.m.), Conlin, John, Johnston, Johnson, City Engineer
Bohrer, City Attorney Filla and Administrator Kueffner.
1. AGENDA
DELETE: 8A. Impounding Agreement with St. Croix Animal Shelter (Tabled to August
16, 1994 council meeting.)
10A. Proposed ordinances relating to Curfew, Noise, Loitering (Tabled to
discuss with Washington County Sheriff's Dept.)
ADD: 7E. Update on the Rolling Hills paving, 7F. Authorize the Mayor to sign the
cracksealing contract.
M/S/P Johnson/Johnston - to approve the August 2,1994 city council agenda as
amended. (Motion passed 5-0).
2. MINUTES: July 19, 1994
M/S/P Conlin/Johnston - to approve the July 19, 1994 city council minutes as amended.
(Motion passed 5-0).
3. CLAIMS:
M/S/P Mottaz/Conlin - to approve the August 2,1994 Claims #2903 through #2932 as
presented. (Motion passed 5-0).
4. PUBLIC INFORMATIONAL/INQUIRIES:
A. Public Inquiries
Mayor John announced the following:
Grand Opening, Sunday, August 14, 1994, 1-5 p.m., Farming Heritage Century Farm
Day at the Washington County Historic Court House,
Received a letter from Keith Geiger, President -National Education Assoc., delighted
that Meredith Cable offers the Learning Channel to communities and requested
interested viewers to write in.
LAKE ELMO CITY COUNCIL MINUTES AUGUST 2, 1994 2
Informational meeting on the Junker Superfund Landfill will be held on Tuesday, August
16, 1994, 10 a.m. at the Community Room in the St. Croix County Govt. Center in
Hudson, Wise.
Council received a letter from Eldon Smith, 32nd Street, indicating they submitted a
petition signed by everyone on 32nd Street to make their street safe for those who live
on it or children who play on it, and they got signs saying "Limited Sight Distance".
They even took the 25 mph speed sign so they don't have a speed limit any more.
Many people use 32nd Street as a shortcut to the highway and drive at dangerous
speeds.
Per Dan Olinger, there are two "25 mph speed limit" signs, one on each end, and two
"Limited Sight Distance-1/2 mile" signs placed on both ends of street. One of the 25
mph speed limit sign had been moved 100'.
Administrator Kueffner will respond to Mr. Smith's letter addressing the Council's
reaction. If speeding is a problem on the street, Councilman Johnson suggested
requesting deputies patrol 32nd Street to see if it would help the situation.
B. Jaycee Proclamation (Huffn Puff)
MAYOR JOHN PROCLAIMED THE SECOND WEEK OF AUGUST, 1994 TO BE
HUFF'N PUFF DAYS, THE OFFICIAL CITY CELEBRATION FOR 1994 IN LAKE
ELMO, AND URGE ALL CITIZENS OF OUR COMMUNITY TO GIVE FULL REGARD
TO THE PAST AND CONTINUING SERVICE OF THE LAKE ELMO JAYCEES.
C. Jaycee Non -Intoxicating Liquor License
M/S/P Conlin/Johnston - to grant a non -Intoxicating Malt Liquor License to the Lake
Elmo Jaycees for Huff's Puff days and further to waive the license fee. (Motion passed
5-0).
D. Invitation from MAC to tour city facilities
Bill Wacker, MAC Chairman, invited the Council to tour the Fire Department facility and
Maintenance Building. The council scheduled the tour for Monday, September 12, 7
p.m., Mr. Wacker will check with the Fire Chief and Maintenance Foreman if this date
is convenient.
5. PLANNING/LAND USE & ZONING:
A. Martin Colon-resubmittal of application
Attorney Filla explained there are provisions in the city code that deal with the
procedure for reviewing appeals of administrative determinations. Notice of Appeal
LAKE ELMO CITY COUNCIL MINUTES AUGUST 2, 1994 3
was filed on July 20. 1994. The procedure requires that the applicant be personally
served at least 10 days before the hearing or be given mailed notice at least 13 days
before the hearing. Filla recommended that the council not conduct this hearing
tonight, but continue it to the August 16, 1994 meeting.
Don Niles responded he would expect the city council would want to follow their
ordinances and hear this matter on August 16. On behalf of Martin Colon, they will
waive the requirement for personal service as long as they receive notice by mail of the
scheduled hearing on the council agenda.
M/S/P Johnston/John - to schedule an appeal hearing on the Martin Colon application
for August 16, 1994 and the applicant be served with the proper notice. (Motion
passed 5-0).
6. UNFINISHED BUSINESS:
A. Olson Lake Estates Pond (Continuation)
Valley Branch Plan Amendment
Bohrer reported that as the draft was being written, the VBWD provided copies to all the
communities in sections and the cities' commented on these sections. It's a matter of
comparing those comments to the final draft to see if they incorporated any of the
comments. Bohrer estimated a $1,000 cost to review and submit comments at the
August 16 meeting which will be passed on to the VBWD.
M/S/P Johnson/John - to direct the city engineer to review the VBWD plan amendment
and submit written comments to the City Council by August 16, 1994 for their review.
(Motion passed 5-0).
M/S/P John/Johnson - to direct the city administrator to make a formal response to
withdraw the City's Intervention in the permit request by VBWD to the DNR on the
temporary discharge permit from Olson Lakes Estates Pond into Olson Lake. (Motion
passed 5-0).
Administrator Kueffner will update Attorney Dayton of the Council's action and see if
this is the right procedure
B. Highway 36 Meeting - Update
As a result of the comments at the workshop meeting with Pine Springs, Grant
Township and Lake Elmo, another joint meeting to include residents of all three
communities was called for August 24 at the Stillwater Senior High School.
Don Theisen, Washington County Public Works mentioned he would be in attendance
at this meeting.
LAKE ELMO CITY COUNCIL MINUTES AUGUST 2, 1994
M/S/P Mottaz/John - to schedule a joint meeting to include residents from Lake Elmo,
Pine Springs, Grant Township, for 7 p.m., August 24, 1994, at the Stillwater Senior High
School, and to print notice of meeting on front page of City's Newsletter, send press
release to all newspapers, including the St. Paul Paper, and to the new Stillwater radio
station and put an announcement on cable. (Motion passed 5-0).
7. CITY ENGINEER'S REPORT:
A. Street Light Request: 39th St. & Laverne, 39th St. & Lake Elmo Avenue
The City received a letter from Donald T. Raleigh, Lake Elmo Bank, requesting that the
city install street lights at the intersection of 39th Street North and County Road 17
(Lake Elmo Avenue) and at the intersection of 39th Street North and Laverne Avenue.
This request is made out of concern for their customers, employees and the many other
people who regularly use 39th Street North.
Bohrer reported there would be an installation cost because 39th Street is an
underground electric service area, and there are no existing utility poles for which the
lights could be mounted.
Councilman Mottaz suggested looking into developing a lighting plan for a strip along
Hwy 5 from the bank, up to, and including County Road 17, which would add to the
safety factor and dress up the area
M/S/P Mottaz/John - to direct the city engineer to contact NSP and find out what the
installation charge would be for installing street lights at the two locations requested by
the Lake Elmo Bank and investigate with NSP the cost of a network lighting system
(Motion passed 5-0).
When Bohrer makes his written report in advance to the Council, he will send a copy of
that letter to the Lake Elmo Bank so they will know the cost estimate in order to make
an informed decision. The monthly cost for electricity and maintenance on a street light
is about $15/each per month.
B. Update on local surface water management plan
In his letter to the council, dated July 29, 1994, Larry Bohrer gave an update on the
Local Surface Water Management Plan. The Council approved the examples of the
mapping that were submitted. One of the tasks to be done for this year's budget is to
identify existing problem areas of the city that are going to warrant further study in
Phase 2.
M/S/P Mottaz/Conlin - to direct the City Engineer to solicit comments from Public
Works, administrative staff, VBWD, to assemble a list of existing problem areas that
(� may warrant further study and submit this to the city council. (Motion passed 5-0).
LAKE ELMO CITY COUNCIL MINUTES AUGUST 2, 1994
C. County Road 10 Mitigation
Larry Bohrer provided the council a report, dated July 29, 1994, on CSAH 10 Mitigation
Plan. The mitigation will be performed on Tom Armstrong's property adjacent to the
lake. In the agreement between the County and Armstrong, all material excavated from
the mitigation site is to remain on the Armstrong land and not hauled away. Three
different sites have been identified on the plan where this material is to be disposed of.
About 80,000 CY of soil that will be excavated for the mitigation, 20,000 CY of the more
suitable soil is intended to be spread south and east of the southerly storage building
and graded level. Approximate depth of fill at this location is 7 feet. The topsoil
material will be placed between the farmstead and the red brick Armstrong house south
of 15th Street. The remaining material will be placed south of the red brick house, west
of CSAH 13 and north of an existing field entrance.
Bohrer explained he brought up the grading and filling before the council because there
is no clear administrative procedure how to handle this kind of activity in the code. The
City can issue an excavation and grading permit and can attach whatever reasonable
conditions are appropriate to insure that the project is constructed in compliance with
concerns.
Council member Conlin pointed out if there is any changes to the landscape condition,
the CUP would have to be amended and resubmitted to the city. She voiced her
concern on the 7' depth of fill at this location which would cause the outside storage to
be more visible. Mottaz and John voiced their concern on stockpiling. There were no
concerns on the other two designated sites (topsoil area and agricultural area)
Filla stated if it appears as though this project will impact a condition of the existing
permit then it has to come back to the council. Don Theisen said the county was not
aware of the CUP when they were making a deal with Mr. Armstrong.
M/S/P Mottaz/John - that the city engineer and attorney study this proposal in relation
to the CUP and make recommendations to city council by August 16, as to what
permits are necessary and what contingencies are required. (Motion passed 5-0).
D. County Road 10-Reconstruction Update (Washington County)
Don Theisen, Washington County Public Works, reported bids have been opened and
they have a low bidder of $3,025,000 with Forest Lake Contracting. The County's
share is $2.7 million, Oakdale share is $230,000, and the other $70,000 is MnDOT for
signals. Bid award and preconstruction conference is scheduled for August 9 at
Washington County Public Works..
LAKE ELMO CITY COUNCIL MINUTES AUGUST 2, 1994
Susan Dunn, provided a letter from the Met Council to Corps of Engineers indicating
the proposed project, 10th Street, is in direct conflict with existing goals and policies in
Lake Elmo's comprehensive plan. Insufficient justification has been presented by the
project proposal for the level of service provided.
E. Update on Rolling Hills Paving
Larry Bohrer reported that the second and final blacktop was placed on the road in
Rolling Hills and the job looks very good. Bohrer will come back to the next meeting
with a request for reduction in escrow.
F. Cracksealing Contract
M/S/P Mottaz/Conlin - that the Mayor be authorized to sign on behalf of the city the
cracksealing contract with Bergmann Companies, not to exceed $10,000, which will
concentrate on roads overlayed last year or newly constructed in the last few years
Olinger is preparing map of prioritized areas. (Motion passed 5-0).
Bohrer will get together with Dan Olinger to review project that would affect the budget
which will be discussed at the August 9, 1994 workshop.
8. CITY ATTORNEY'S REPORT:
Impounding Agreement Tabled
Update on impact of fill on Armstrong CUP
Attorney Filla updated the council that he looked at -the city's permit file and it does
contain incorporated site plans that established a floor elevation for the buildings that
were approved when the permit was originally issued. The County advised that the
final elevations for the exterior storage area, after the fill has been placed, will not
exceed and will probably be less than, the floor elevations that have already been
approved.. County has indicated they have no problems with the permit. Filla will report
back to the council at the August 16th meeting.
9. CITY COUNCIL REPORTS:
Mayor John reported:
On July 25 he watched the signing of the St. Croix River Tourism Alliance Articles of
Incorporation by Governor Tommy Thompson of Wisconsin and Governor Arnie
Carlson.
On July 27, he and the City Administrator attended a meeting with the Lake Elmo
Volunteer Firemen and discussed issues from equipment disposal to budgets and
coverage agreements between Lake Elmo and adjacent communities. Mayor John
recognized the resignation of Bill Eder from the Department after more than 30 years
voluntary service/
LAKE ELMO CITY COUNCIL MINUTES AUGUST 2, 1994
M/S/P Mottaz/Johnson - to send a letter to Bill Eder recognizing 30 years of Volunteer
service as a Lake Elmo firefighter and thanking him on behalf of the City for providing
fire protection and rescue services to the citizens of Lake Elmo. (Motion passed 5-0).
Flush Water Hydrants which are located at various points in the city are not fire
hydrants. They are only used to flush out the domestic water systems at times of
maintenance. They do not have the water supply capacity for fire fighting use and
should not be indicated as such in home insurance application forms.
On August 3 at 7 p.m., he will attend a planning discussion on the 1-94 Corridor at the
Fortis Insurance Bldg. and will report back on August 16, 1994. This is at the invitation
of Senators Laidig and Price, Representatives Neary and Perlt. Other municipalities
have also been invited to develop a coordinated vision of the corridor.
Council member Conlin asked Administrator Kueffner for an update on the cable
commission meetings and what progress she's had on contacting Adrian Herbst, Cable
Commission attorney.. Kueffner responded she was not able to attend those meetings,
but plans on attending the next meeting on August 24, 1994 and has not contacted
Attorney Herbst.
Councilman Mottaz asked if the city administrator could give a refresher course in form
of a memo on the sanitary sewer options for 1-94.
10. CITY ADMINISTRATOR'S REPORT:
A. Proposed Ordinances relating to Curfew, Noise, Loitering - Tabled
Councilman Mottaz asked if the city is taking into consideration the Metro wide program
the cites are trying to establish a uniform curfew code.
B. Design Team
M/S/P Johnston/John - to approach the Minnesota Design Team as soon as we have
assembled adequate local support to make an application and set a goal for the
January 15 deadline for the Fall visit. (Motion passed 5-0).
M/S/P Conlin/Johnston - to adjourn the council meeting at 9:26 p.m. (Motion passed 5-
0).
Respectfully submitted by Sharon Lumby, Deputy City Clerk
AUGUST 2, 1994 LAKE ELMO COUNCIL MEETING
List of Claims for Approval
�. for the period 08/02/94 to 08/02/94 07/29/94
CLAIM
TOTAL
ACCOUNT
ACCOUNT
TO WHOM PAID
FOR WHAT PURPOSE
DATE
NUMBER
CLAIM
NUMBER
AMOUNT
LEAGUE OF MN CITIES
AUGUST INSURANCE PREMIUM
08102/94
2103
3,166,72
100-41500-130
1,756.93
100-42400-130
418.11
100-43100-130
991.68
MINN. BENEFIT ASSN.
AUGUST INSURANCE 'PREMIUM
08/02/94
2904
682.30
100-41500-130
72.12
100-43100-130
516.18
ALLIED GROUP INSURANCE TRUST
AUGUST INSURANCE PREMIUM
08/02/94
2905
62.82
100-41500-130
34,17
t00-42400-130
15.10
100-43100-130
13.55
D.C. HEY CO.
COPY MAINTENANCE CHARGE
08/02/94
2906
186,38
180-41500-200
186.38
PITNEY BOWES
POSTAGE & MAILING MACHINE MAINT
08/02194
2907
438.00
100-41500-200
438.00
A T & T
OFFICE TELEPHONE
08/02/94
2908
67.41
100-11500-320
67,41
U. S. WEST
JULY TELEPHONES
08/02/94
2909
473.57
100-41500-320
232,79
100-42200-320
94.03
160-43100-320
87.52
100-45200-320
59.23
CONMUNISTARR INC
SIREN REPAIR
08/02/94
29L0
457.28
100-41390-209
467.28
F.X.L., INC.
ASSESSOR MONTHLY PAYMENT
08/02/94
2911
1,300.00
100-11550-300
1,300.00
MICHAEL SMITH
JULY ANIMAL CONTROL OFFICER
08/02/94
2912
800.00
100-42700-110
800,00
ARCH MINNESOTA, INC.
CLEAN-UP DAYS APPLIANCE REMOVAL
08/02/94
2913
828.00
100-43100-384
828,00
LILLIE SUBURBAN NEWSPAPERS
AO FOR COMPOST WORKERS
08/02/94
2914
53.60
100-43200-317
53.60
FIREHOUSE MAGAZINE
FIRE DEPT - 24 ISSUES
08/62/94
2915
39.97
100-42200-433
39.97
ULAfl ONE
FIRE DEPT CELLULAR PHONE
08102/94
2916
11.06
100-42200-320
11.06
1h] INC
FIRE DEPT TRUCK REPAIR
08/62194
2917
246.63
109-42200-220
246.63
A T & T
MAINT DEPT CELLULAR PHONES
08/02/94
2918
49.80
100-43100-320
49.80
FOX VALLEY SYSTEMS, INC.
NAINT DEPT STREET SUPPLIES
08/02/94
2919
133,46
100-43100-223
133,46
RANG MC NALLY
MAINT DEPT STREET SUPPLIES
08/02194
2920
191,39
100-43100-224
191.39
UNIVERSITY OF MINNESOTA
MAINT DEPT-SNOW & ICE CONTROL CLASS
08/02/94
2921
45.00
100-43100-207
45.00
ZACK'S INCORPORATED
MAINT DEPT SUPPLIES
08/02/94
2922
10.09
100-43100-223
10,09
DOYLE INCORPORATED
MAINT DEPT BITCH MOWER REPAIRS
08/62194
2923
112.76
100-43100-221
102.76
NORTHERN
MAINT DEPT SUPPLIES
08/02/94
2924
186,14
100-43100-224
186.14
CAPITOL SUPPLY CO.
MAINT DEPT SUPPLIES
08/02/94
2925
25.,24
100-43100-223
25.24
NARV'S TOOL'S INC.
MAINT DEPT TOOLS & SUPPLIES
08/02/94
2926
121.43
100-43100-223
121.43
NENAROS
MAINT & PARKS SUPPLIES
08/02/94
2927
173.10
100-43100-223
140.96
100-46200-219
32.14
POLFUS IMPLEMENT
PARKS DEPT EQUIP REPAIR
08/02/94
2928
156.10
100-45200-221
156.40
VERN'S GTC AUTO PARTS
PARKS DEPT EQUIPMENT REPAIR
08/02/94
2929
16.46
100-45200-221
16.46
ON -SITE SANITATION INC
SUNFISH PARK SATELLITE
18/02194
2930
31.09
100-45200-386
37.09
GRUBER'S POWER EQUIPMENT
PARKS DEPT EQUIPMENT REPAIR
08/02/94
2931
24.44
100-45200-221
24,44
"JIMMY'S JOHNNY'$"
6 SATELLITES REIMB. BY JAYCEES
08/02194
2932
336,44
100-45200-336
336.14
TOTAL FOR MONTH
10,322.98
10,322.98
1994
JI, 2 S 1994
LAKE ELMO BANK
A TRADITION OF SERVICE
July 25, 1994 DONALD T. RALEIGH
PRESIDENT/CEO
Mary Kueffner, City Administrator
City of Lake Elmo
3800 Laverne Avenue North
Lake Elmo, MN 55042
Dear Mary;
The purpose of this letter, is to request that the City install street lights at the
intersection of 39th Street North and County Road 17 (Lake Elmo Avenue) and at
the intersection of Ath Street North and Laverne Avenue.
39
We make this request out of concern for our customers, employees and the
many other people who regularly use 39th Street North. During the seasons with
short daylight hours, those intersections are very dark and, it appears to us, there is a
great potential for accidents at those intersections.
While most of our customers are in cars, there does seem to be a certain
amount of pedestrian traffic on 39th Street North.
Thank you for your consideration of this request.
DTP/pw
Sinc
e ,
a_
Donald T. Raleigh
11465 39TH STREET NORTH ■ LAKE ELMO. MN 55042-0457
612/777-8365 ■ FAX 612/773-4739
STREET LIGHTING POLICY AND PROCEDURE - 8/6/85
SECTION 1. POLICY
It shall be City policy to install street lights on the basis of
need. The determination of need shall consist primarily of factors
related to traffic safety, police powers or engineering factors.
SECTION 2. PURPOSE
The purpose of this policy is to establish criteria for ordering
street light installation; to set forth City financial responsibility;
and to provide guidelines as to the type and extent of Lighting programs
SECTION 3. INITIATION
PUBLIC REQUEST Property owners or residents may petition for street
lights. Petitions must be submitted to the City Engineer for Presen-
tation and consideration by the Council. 75% of the residents within
of the proposed
and agree
light must petition the City for the lighting
and agree to pay the costs of installation.
THE COUNCIL may provide street lighting without a request if it is,
in their~ estiim`ation, a matter of public safety and welfare.
SECTION 4. COST ALLOCATION
Generally, the City shall assume all electrical energy costs.
Where overhead lights are installed and there is no installation charge
by the electric utility supplier, there will be no charges passed on by
the City. Ornamental overheads shall be charged against property
owners for installation and material costs. Areas served by underground
service shall be charged for installation and material costs.
SECTION 5. LOCATIONS
As a general rule, only intersections are to be lit. Exceptions
may occur as a result of street configuration, obstructions, or other
features which necessitate mid -block lighting for vehicle or pedestrian
crossing safety. Lights provided will be in accordance with the City's
Engineering Standards. Street lights will be no less than 300 feet
apart.
If the residents of a specific area are desirous of a different type
lighting (e.g. ornamental, higher wattage bulbs, or closer spacing),
the City will Dover cost according to the above policy and any additional
costs will be paid directly by residents of the benefited area.
JUL-29-1994 13122 TKDA 61' 2192 130r33 P.03F't07
TKDA.
TOLTZ. KING, DUVALL. ANDERSON
ANO A0000IATE0, INGORPORATED
ENGINEERS • ARCHITECTS • PLANNERS
1800PPER JAFFRAYP ALy
414 CEDAR OTREET
SAINT PAUL. MINNSSOTAeS901R140
PHONE:e1110vc,440o Fftai mo2.00es
July 29, 1994
Honorable Mayor and City Council
Lake Elmo, Minnesota
Re: Local Surface Water Plan
Lake Elmo, Minnesota
Commission No. 10567-01
Dear Mayor and Council Members:
The purpose of this letter is to update the Council on the Local Surface Water Management Plan,
On November 12, 1993, , we provided the Council with a work scope and cost estimate for
preparation of a Local Surface Water Management Plan, See attached correspondence. A
budget of $15,000 was established for 1994 and two tasks were chosen:
1, Map of existing stormwater system showing pipes, culverts, stomtwater ponds and
structures. Budget = $13,600.
2, Identification of existing problem areas that warrant further study. Budget = $1,400.
Presently, the mapping is about 90% complete. Final checking by us and Public Works staff is
still required. Examples of the mapping will be brought to the Council Meeting.
Tasks which still remain are a tabulation of the I00-year flood levels and peak discharges from
existing and proposed ponds and channels. Also remaining is the identification of problem areas
which should be studied in the plan. This identification could be by mailed questionnaire or
public meeting,
The amount expended to date is under $7,000. It appears the tasks assigned for 1994 will be
completed substantially under budget.
Sincerely yours,
.Larry D, Bohrez, P.E.
LDB: j
7UL-29-1994 13: „ TKDA 612 2P2 01963 P. 04.'07
TKDATOLTZ.
WNO. DUVALL, ANDER89N
AND A880CIATrS, INCORPORATED
ENGINEERS • ARCHITECTS • PLANNERS
November 12, .1993
1500 PIPER 7FRAV PLAZA
444OEDAR6t W
SAINT PAUL. MINNESOTA 65101-2140
PRONEt012202.4400 FAX:41*409-dn0
Honorable Mayor and City Council
VIA FAX
Lake Elmo, Minnesota
Re: Local Surface Water Management Plan
Lake Elmo, Minnesota
Commission No. 9150-003
Dear Mayor and Council:
The City Council has expressed the desire to have a Local Surface Water Management Plan and
in that regard, the engineer was instructed to prepare a work scope and cost estimate for review.
Standards for content of local plans are found in Minnesota Rules Chapter 8410 "Metropolitan
Area Local Water Management". The Rules, which are attached, state that a local plan must
contain at least the following:
Flan Content
A. Table of Contents
B. Statement of Purpose
C. Water Resource Management Related Agreements
D. Executive Summary
E. Land and Water Resource Inventory
1, Precipitation Data
2. General Geology and Topographic Data
3. Surface Water Resource Data
a) Map of public waters, ditches, and control structures
b) National Wetlands Inventory Map
c) Wetland inventory for functional classification
d) Major hydrologic characteristics of public waters
e) Map of existing stonnwater system showing pipes, culverts, stormwater
ponds and structures
f) Table summarizing 100-year flood levels quid peak discharges from existing
and proposed ponds and channels
g) Discussion of, or map showing flooding problems
it) List of existing flood insurance studies
i) Sunnnary of available water quality
j) Map of existing or abandoned water quality monitoring sites
k) Inclusion of shoreland ordinances
1) Table listing amounts and locations of all surface water appropriations
permitted by the DNR
4. Groundwater Resource Data
JUL-29-1994 1.3:23 TKDR
612 292 000-1 P. US: 0?
Honorable Mayor and City Council
November 12, 1993
Pape 2
S. Soil Data
6, Land Use and Public Utility Services
a) Map of existing land uses
b) Map of anticipated land uses
o) Map of MUSA
Water -based Recreation Areas and Land Ownership
8. Dish and Wildlife Habitats
9. Unique Features and Scenic Areas
10. Pollutant Sources Including Location of Open or Closed Landfills, humps, Storage
Tanks, Wastewater Discharges, and Available Water Quality Information Relating
to These Sites
F. Establishment of Policies and Goals
G. Assessment of Problems
H. Corrective Actions to Problems
I. Financial Considerations
Timing
The above rules became effective August 1, 1992. The VBWD is currently amending its plan in
accordance with the above rules and hopes to have their amended plan adopted by August 1,
1994, The local units of government will then have until August 1, 1996 to complete their local
plans to conform to the overall district plan.
Estimates of Cost
The City does not have the funds to complete the local plan all at once. Nor would it be wise to
complete all of the plan prior to completion and approval of the VBWD plan amendment for two
reasons. Firstly, some of the data presented in the VBWD report is the same data required in the
local plan and therefore would not have to be compiled independently by the City. Secondly,
goals and policies of the VBWD plan should be discussed and any issues resolved first because
the local plan ultimately must conform to the overall plan.
� .JUL-29-1994 13:24 TKDA
612 292 0033 P.06107
Honorable Mayor and City Council
November 12, 1993
Page 3
There are some areas of the plan which do not relate to policies, are not controversial, and could
begin now. The two areas of the plan which could begun now are portions of the surface water
resource data inventory and identification of problem areas. Specifically, Task E.3.e) and f)
which is the mapping of existing pipes, culverts, stonmwater ponds, outlet control structures, and
the tabulation of flood levels and discharges from these structures, could be completed now.
This 'mapping would also benefit the Maintenance Department in their work of locating and
maintaining these existing structures. The second task that could be completed now is Task 0
which is the identification of problem areas. The estimated cost to analyze the problem areas is
directly dependent on the number of problem areas to be studied,
The estimated cost for the stonnwater system inventory and mapphng is $13,600,00 and is
recommended to be Phase 1 of the local surface water management platunhng, Also included in
Phase 1 is the identification of existing problem areas that warrant study. This will involve some
workshops with the Council and/orpublic meeti,ogs. Once the areas to be studied are Identified,
a cost estimate can be prepared. The actual study of these areas would be considered Phase 2.
The estimated cost to identify those problem areas which warrant further study is $1,400.00,
The total estimated cost for Phase 1 work is $15,000.00,
Sincerely,
X�—? /jo s/�
Larry 1), Bohrer, P.E.
LDB/mha
TUL-29-1994 i Tk'DA
612 292 000- P.02,02
i K-D�r.
ENGINEERS - ARCHITECTS • PLANNEM
July 29, 1994
Honorable Mayor and City Council
Lake Elmo, Minnesota
Re: CSAH 10 Mitigation flan
Lake Elmo, Minnesota
Commission No. 9150-940
Dear Mayor and City Council:
TOLTZ, KINO, DUVALL, ANDERDON
AND A06001ATE9, iNOORPORATED
1400 PIPER JAPFAAV PLAYA
4440E0ARaTREET
SAW PAUL, MINNFBWA6d101.2140
PHONEi01zr2u2J400 PAX-1012MV24M
Part of the Washington County road project for widening CSAH 10 involves filling into
Armstrong Lake, for which mitigation is required. The mitigation will be performed on Tom
Armstrong's property adjacent to the lake. lrt the agreement between the County and Armstrong,
all material excavated from the mitigation site is to remain on the Armstrong land and not hauled
away.
The County has prepared a plan which shows the placement of this excess soil. About 80,000
CY of soil will be excavated for the mitigation. About 20,000 CY of the more suitable soil is
intended to be spread south and east of the southerly storage building and graded level.
Approximate depth of fill at this location is 7 feet. Side slopes will be topsoiled with seed and
mulch.
The topsoil material not needed at the mitigation site will be placed between the farmstead and
the red brick Armstrong house south of 15th Street.
All remaining soil will be placed south of the red brick house, west of CSAH 13 and north of an
existing field entrance. This land is presently lower than CSAN 13. These stockpile areas will
be leveledby the County's contractor but the turf establishment will be Mr. Armstrong's
responsibility.
The disposal and stockpile areas are shown on Sheet 64 of the CSAH 10 plans. I will have a
copy at the Council meeting.
Action Requested
I can find no specific administrative procedures in the City Code which address this type of
grading and filling; therefore, I thought it wise to bring this matter before the City Council.
Section 901..010E of the Mining Ordinance specifically exempts the moving of dirt within the
construction limits of a road project from mining regulations.
TFITCA G n7)
JUL-29-1994 13:22 TKDA
612 292 0081, P.02./V
Honorable Mayor and City Council
Lake Elmo, Minnesota
July 29, 1994
Page Two
Section 502.050 of the Building Code describes excavation and grading permits. This section
seems to relate more to the preparation of land for building construction. The page from the
Building Code is attached.
1 have reviewed the proposed disposal and stockpile plan. No drainageways will be blocked by
this fill. X only have three concerns:
1. How high will the stockpile adjacent to CSAH 13 be?
2. Silt fence should be placed at the base of the downsiope side of the fill areas until turf is
established.
3. The areas of seed and mulch which are to be applied by Torn Armstrong shalll be placed
within two weeks of completing the fill operation.
Sincerely yours,
=11011-0
LDB: j
cc: Don Theisen
Tom .Armstrong
Memo
To: Mayor and City Council
From: Mary Kueffner
Date: July 19, 1994
Subject: Olson Lake Estates Pond
I spoke with Chuck Dayton about the upcoming public meeting scheduled for August 11. This
meeting is in response to our intervention in the VBWD temporary discharge permit requested
from the DNR.
Mr. Dayton has expressed the following thoughts to me regarding this permit and the public
hearing:
• Do we want to provide "expert testimony," such as a limnologist to discuss the impact of
the discharge on Olson Lake?
• Mr, Dayton suggested that we have a court reporter at the meeting. The reporter can
report the meeting, but not transcribe it unless we need it at a future date. I have checked
with Logal & Styrbicki Court Reporting Services in St. Paul. Their charges are $35.00 per
hour. If we want the testimony transcribed, the cost is $4.60 per page. Northwestern Court
Reporters in Hudson charges $30.o0 per hour, and $2.55 per page of transcript. They also
charge $7.50 per hour for travel time.
• Mr. Dayton has also suggested we have someone from the MPCA speak to the water
quality Issue. That may be an option to look at rather than paying for a limnologist.
•The DNR (permitting agency) has delegated this public hearing to the Valley Branch
Watershed, despite our objections. The public hearing is scheduled from 6:00 p.m. to 7:00
P.m. on Thursday, August 11, 1994, prior to the regular VBWD meeting.
I have talked with Peter Zetterburg about this hearing. He feels the hearing is unnecessary for
the temporary permit, and the City should be concentrating on VBWD's Plan Amendment that
shows options for permanent solutions to the issues we have raised.
I talked with Randy Peterson of Barr Engineering today. They will be taking water samples of
both the Pond and the Lake tomorrow. The results of the testing they have done to date are
shown on the attached exhibits.
On 5-4-94, prior to alum treatment, the phosphorus lever of the Pond was 125. The levels after
treatment were 5-9-94 - 36 ug/L; 5-13-94 -28 ug/L; 5-20-94 - 54 ug/L; and 6-9-94 - 65 ug/L.
The Lake was tested on these same dates. Their phosphorus levels were: 5-4 - 20 ug/L; 5-20-
94 - 23 ug/L; (North end) 19 ug/L (South end); 6-9-94 - uug/L (North end) 13 ug/L (South end).
fri
Do we want to spend the money to intervene in a temporary permit is the questions we should
ask ourselves, or do we want to make sure that the long term solution is implemented into
VBWD's Plan. The temporary permit expires in August of 1995. If you chose to not intervene in
the temporary permit, (even though we have already done so) we could ask the DNR for a
guarantee that the final permit would not be an extension of the current temporary permit, but
rather a whole new process starts with input from the public not only allowed, but encouraged.
111
I .1
Olson Lake Estates Pond (DOW #t82A77W)
Dla. Seahl Sample
Speci0c Coed
T0hlP Tolai DlsolredP
TWai
Mnimm� TuehkOly PH
Todl
��� linity
Deplh D[ Depth Temp.
D.D. amhdmi@
C)
(�e,) (aq/[.)
OWL) (KM (8 Id Units)
)
We (6A @A f5A (C)
(M91L) 25
125
OS)(/3/91 6.1 0.7 0.0 72.0
Ill
_
355
-
1.0 lu
11.1
368
20 11.0
99
358
3.0 105
8.7
30
_
114
56
31 -
.'
.
- -
4.0 9.0
1.5
382
119
60
-
43
-
-
-
_
5.0 9.0
5.6 8.0
6A
5A
412
426
139
58
- -
- -
ALUM THE%T61ENT OFOt5ON LAKEUTtTU I'ONDONWM4
3:600
OVUM 6.1 - 42 -
-
-
_
_
13
7.20 -.
.0.0 -
_
.. 7
7.OB
1.0 -
-
-
-
_
_ 10
7.26 -
2.0 -
-
_
- Il
739 -
3.0 -
-
-
-
_
560 -
_
32 - e
-
-
-
_ 13
7.49
4.0 -
-
_
_
570 -
-
43 -
-
-
-_
_
_ 2D
7.49 -
SA -
-
-
_
00 -
-
5.6 -
-
-
_ 26
7A4 -
&0
-
/.
5
OSM9N4 6.1 19 0-2 -
0.0 13.0
IIR
370
-36
-- 7
_ 7
6.3 -'
6.4 -
' 1.0 13.0
112
370
-
-_
7
6-5 .-
2.0 13.0
11.0
368
-
_ 10
62 _
ID 11.5
9.6 '
368
B5
29
- -
32 -
-.
-
_. 13
6.9 -.
U 9.0
4A
388
-
29
43 -
-
98
_ 16
6.7 -_
5.0 8.0
5.6 9.0
25
1.7
423
426
-
110
36
- -
_. _
6.6 _
5.9 -
-
-
Lake Olson (DOW #82-103P)
Max.
smchl
Sample
_
SpcdPcCond.
Date
Location
Depth
Depth
Disc
Depth
Temp.
D.O.
umhol m @
Total P
Total Dissolved
Turbidity
PH Total Aluminum
(M)
(h71
(C)
(nI /L)
15 C)
(1191l.)
(ug/L)
(NTU)
(Std. Units) (up/i,)
05/04/94
North End
5.6
3.4
0-2
-
20
9
(Deepliole)
0.0
12.5
11.8
302
--
_
1.0
12
11.2
306--
20
12
9.4
302
-
--_-
3.0
11
7.5
303
22
9
4.6
11
6.4
301
21
9
5.0
11
6.0
301
-
-
_
5.1
It
6.0
301
22
9
05/20/94
North End
5S
4.0
0-2
-
-
-
23
8
-
'
(Deep Bole)
0.0
21.0
9.6
778
--
-
9.0
8.4 --
-
`
Lo
2LO
9.7
778
-
-
8.0
8.4 _
2.0
21.0
9.7
788
-
-
4.5
8.4 -
3.0
19.0
9.8
840
19
10
5.5
8.4
4.0
17.5
9.6
840
19
10
5.0
8.2
5.0
16.5
7.8
858
26
10
5.0
7.9 _
05120/94
south End
(Near Outlet)
3.9
3.8
0-2
-
--
_
19
10
-
_
0.0
20
9.8
314
--
-
6.0
8.3 -
1.0
20
9.7
314
-
-
5.0
83 --
20
19
10.1
308
21
10
4.5
8.4
3.0
18
10.1
309
-
-
3.0
8.4 --
3.4
18
10.1
309
26
10
3.0
8.5 -
05/20/94
Near Olson lake Estates Outlet
1.0
-
--
_-
--
-
4.5
8.5
61
Olson fake Estates Pond (DOW #182-477W)
Max. Secchl Sample Sped0c Cond.
Depth Disc Depth Temp. D.O. umho'rni @ III Total P Total Dissolved P
Date (MI (M) (C) (mg/L) 25 CI (uB'L) (u8/)
051t3/94 6.1 1.1 0-2
--
-
-
28
14
0-0
17
11.8
360
-
-
1.0
16
11.8
370
--
-
2.0
15
11.8
372
-
- -
3.0
15
11.2
364
-
-
3.2
--
--
--
59
19
4.0
14
7.6
372
-
-
4.3
--
--
--
74
17
5.0
10
OS
407
-
--
5.6
9
0.5
414
75
28
5.8
-
-
-
PRECIPITATION EVENT ON 5114/94 (036 INCHES)
BEGIN DISCHARGE AT 3:00 PALON 5119194
05/20/94 5.5 1.2 04
--
-
--
54
17
0.0
21.5
10.9
380
-
--
1.0
21.0
10.8
380
-
-
2.0
19.0
10.0
380
48
13
3.0
16S
9.0
376
-
-
3.5
--
-
-
54
15
4.0
14.0
1.2
384
-
--
5.0
9.0
0.5
431
96
26
PRECIPITATION DURING OSt2Ol94 TO 6109194 TOTALED 3.18INCHES
6109194 3.9 0.8 0-2
--
-
-
65
16
0.0
21.5
10.0
375
-
1.0
21.0
9.5
376
-
-
2.0
20.0
5.3
374
78
16
3.0
13.0
OS
422
62
16
3.4
11.0
03
432
1 84
11
Lake Olson (DO W #82-103P)
Max. secchl Sample. Specilic Cond.
Depth Disc Depth Temp. D.O. umho%m Total Total Dissolved P Turbidity p1I Total Aluminum
Date Location (M) (AI) (b1) (L7 (mg/L) 25 C) (ug/L) (ug/L) (NTU) (Sid. Units) (ug/L)
06/09194 Nonh End 5.5 3.9
0-2
--
--
-
16
16
--
_ _
(Deep hole)
0.0
21S
9.6
305
-
--
0.8
8.7 --
LO
21.5
9.5
310
--
_
0.7
8.7
2.0
21.5
9.5
310
--
-
0.7
8.7 --
3.0
21.5
9.5
310
16
16
0.8
8.7 _
4.0
21.0
9.3
313
15
16
0.7
8.7 --
5.0
19.5
4.8
319
23
11
1.3
7.8 --
06/09ro4 South End
(Near Outlet) 3.9 3.6
0-2
--
--
-
13
6
-
0.0
21S
9.6
309
--
0.9
8.5 --
LO
21.5
9.6
310
-
-
I
86 -_
10
21
9.6
313
13
7
0.9
8.7
3.0
21
9.6
309
16
-
1.0
8.6 _
3A
21
9.5
308
--
7
06/09/94 Neu Olson Lake Estates Outlet
1.0
__
__
_
_
_
8 8
4.0 INDIVIDUAL WATER MANAGEMENT PLANS
4.1 Water Bodies Chosen for Inclusion in Section 4.2 of the Plan
VBWD chose 33 water bodies for inclusion in Section 4.2 of the plan based on VBWD's
knowledge of the following;
■ Past or possible future flooding problems
■ Intercommunity drainage problems
■ Water quality issues and data
■ Revisions to previously -published flood elevations
■ Existing or possible future impacts to VBWD's Project 1007 drainage system
■ Outstanding water resources
4.2 Organization of Individual Water Management Plans
The individual water management plans are organized into three general groups: water
bodies which are part of VBWD's Project 1007 drainage system; water bodies tributary to Valley
Branch Creek; and landlocked water bodies. Within the Project 1007 system, the individual
water management plans begin at the upstream end (Silver Lake) and proceed downstream,
to Rest Area Pond. For the landlocked water bodies, the individual water management plans
begin generally in the north and proceed to the south and east.
4.2.1 Silver Lake Water Management Plan
4.2.1.1 Location and General Description
Silver Lake is a DNR-protected water (#62-1P) located in Subwatershed LL29 (or SL1 in
North St. Paul's Surface Water Management Plan), directly west of T.H. 120 in the Cities of
North St. Paul and Maplewood. The lake has a surface area of about 70 acres and a maximum
depth of approximately 20 feet. The watershed area in comparison to the lake area is relatively
small. The Silver Lake tributary area is 466 acres and is comprised of Subwatersheds SVR1,
LL28 and LL29. Development in the tributary watershed is almost complete, including the City
of White Bear Lake portion of the watershed. Figure 2-3 shows the tributary watershed.
4.2.1.2 Drainage Patterns and Stormwater Issues
The outlet from Silver Lake is a V-notch weir located at Century Avenue (T.H. 120) on
the east side of the lake. The overflow point of the weir is at Elevation 988.5. Water from the
lake flows under Century Avenue (T.H. 120) to a large DNR-protected wetland (#82-375W) in
the Greens of Silver Lake development, located in the City of Oakdale. Some homes adjacent
to the lake experienced basement flooding in 1984 and 1985 when the lake rose above Elevation
989.5. Whether this was entirely due to the lake elevation is not clear. The DNB's ordinary
high water elevation (OHW) is 989.7. According to the North St. Paul Flood Insurance Study,
the 100-year flood elevation of Silver Lake is 991.0. More recent hydrologic model results (by
( Oakdale and VBWD) show the 100-year flood elevation of the lake to be approximately 0.5 foot
lower. The City of North St. Paul and VBWD will enforce the 991.0 flood elevation until the
C city revises the Flood Insurance Study. The results of a 1976 VBWD survey found one home
23\82\045\SEC4.RPT\KMH 1 DRAFT: June 23, 1994
and two garages on the west side of the lake within the 100-year flood plain and an additional
four homes lower than Elevation 993.0 (the minimum building elevation for land adjacent to FF
Silver Lake): F
Drawdown of Silver Lake occurs quickly compared to downstream lakes. This means
that the lake does not hold excess stormwater long enough to be of significant value in
reducing downstream flooding. Although the lake drains quickly, residents are very sensitive
to small changes in lake level.
Silver Lake water level data from 1925 to the present is available from Ramsey County.
Currently, a volunteer measures the Silver Lake water level every week and submits the data
to Ramsey County. Silver Lake's maximum, minimum and average annual water levels for the
years 1925 through 1992 are shown on Figure 4-1.
VBWD, North St. Paul, Maplewood and Ramsey County are all aware of an
intercommunity issue involving a ditch erosion problem upstream of Silver Lake. Located in
North St. Paul, the ditch drainage system carries water from a wetland in Maplewood, north
of Silver Lake, to the northwest shore of Silver Lake. This ditch is located completely within
the limits of one property owner. The ditch is eroding and a sediment delta is forming in
Silver Lake at the ditch outfall. The approximately 2-acre wetland in the City of Maplewood
lies north of Lake Boulevard/Joy Road (Ramsey County Road 109) and west of Lydia Avenue.
As part of a road improvement project in 1990-1991, the City of Maplewood replaced the
wetland's outlet pipe under Lake Road. The new pipe was placed at the same elevation, and
is approximately the same size as the old outlet pipe. However, the old outlet pipe was
partially blocked with sediment, thus creating a floe restriction. The flow restriction was
relieved when the new pipe was installed. As a result, the wetland water level dropped and,
according to the property owner, more water discharges into the ditch, causing more erosion.
4.2.1.3 VBWD Water Quantity Management Goals
As a result of discussions with VBWD and the City of North St. Paul, the City of
Maplewood agreed to place a restriction at the upstream end of the outlet pipe from the
wetland to help reduce flow rates in the ditch and to raise the water level in the wetland.
VBWD has not been able to confirm if the City of Maplewood completed this work. However,
reducing the outflow may not be enough to eliminate the erosion problem. Therefore, in 1994
or 1995, VBWD will undertake an erosion monitoring program to determine if ditch erosion is
still occurring. The major erosion areas along the ditch will be identified and monitored over
a six- to twelve-month period. Cross -sectional survey data will be used to determine the
annual sediment yield from the ditch banks. The extent of the sediment delta will also be
surveyed at the beginning and end of the monitoring period to determine if additional
sediment beyond the ditch erosion, is entering Silver Lake.
It is possible that the sediment delta is the result of sediment from sources other than
ditch erosion. If the monitoring results indicate that the ditch is still eroding and is the major
contributor of sediment to the sediment delta; VBWD will need to institute a project to address
the erosion problem. The project would involve either piping the flow from Lake Boulevard
to Silver Lake or repairing/restoring the ditch with riprap. Another possible solution which
may be investigated involves planting woody plants on the ditch banks to stabilize the banks
and prevent erosion. A careful analysis of the ditch hydrology is necessary, and other
measures, such as flow deflection, may be needed in conjunction with the vegetation for this
method to be successful.
23\82\045\SEC4.RPT\KMH 2 DRAFT: June 23, 1994
4.2.1.4 Water Quality and DNR Data
Although Silver Lake currently exhibits generally good water quality, somewhat poor
water quality was noted prior to 1985. The DNR believes the change in water quality was
associated with a change in the lake's fish population. Prior to 1978, the lake was subject to
seasonally low oxygen levels resulting in winterkills. Frequent winterkills prevented the
establishment of a gamefish population and enabled a large black bullhead population to
flourish in the lake. Since 1978, however, winter aeration has enabled a gamefish population
to become established in the lake. The gamefish population controls the benthivorous
bullheads and planktivorous panfish, both of which contribute to degraded water quality.
The establishment of a gamefish population has caused a dramatic decline in the bullhead
population in the lake, due to the effects of competition between fish species. Initially, the
decline was in the form of an elimination of smaller bullheads. In 1985, the death of large
numbers of older bullheads resulted in a dramatic decline in the bullhead population. The.
DNR reports that trapnet catches of bullheads declined from :
■ 130 in 1980 to
■ 19.5 in 1985 to
■ 1.5 in 1990.
Prior to 1985, the large numbers of bullheads in the lake added nutrients to the water by
stirring up bottom sediments and excreting nutrients into the water. The reduction in nutrients
in Silver Lake during 1985, and in subsequent years, appears to be largely due to the decline
in the bullhead population. Drought conditions during 1987 through 1989 reduced nutrient
loading to the lake which improved its water quality. The water quality improvement
occurring during the late 1980s appears to be a combination of a change in the fish population
and climatic conditions.
The water quality changes noted as a result of the change in fish population within the
lake are expected to continue without interruption. Ramsey County operated a portable pump
and aeration baffle system from 1977 through 1985 to prevent winterkill in the lake. A
permanent pump and aeration baffle system was installed in 1986 to insure the survival of the
gamefish population in the lake. Therefore, the bullhead population is expected to remain low,
and water quality improvements are expected to continue. The DNR currently manages the
lake's native bass and panfish population and stocks walleye and tiger muskie on a regular
basis.
Ramsey County has conducted water quality sampling on Silver Lake since 1974; annual
sampling has been conducted since 1984. Water quality data collected from the lake are
presented on Figure 4-2.
The 1993 Silver Lake data were compared to criteria used to denote a lake's nutrient
"status", and the effects of the nutrients on the general water quality and/or trophic conditions
of a water body (NALMS, 1988). Based on a comparison of the lake's nutrient (i.e., total
phosphorus) concentration to these criteria, Silver Lake would be assigned a trophic status of
eutrophic. This simply means that the lake is rich in nutrients. However, an evaluation of the
effects of the nutrients on the general water quality of the lake (i.e., chlorophyll a concentrations
and Secchi disc transparency) results in a classification of mesotrophic. This means that the
lake is not responding to its nutrient load as expected, and that few algae are found in the lake.
Because of the low algal population, water clarity is quite good.
23\82\045\SEC4.RPT\KMH 3 DRAFT: June 23, 1994
The lake's extensive littoral (i.e., shallow) region and its good water clarity have resulted
in a profuse weed growth throughout the shallow region of the lake. In previous years, weed
harvesting during the late summer has been necessary to facilitate recreational use of the lake.
The aquatic weed Eurasian Watermilfoil (Myriophyllum spicatum) was identified in Silver
Lake for the first time in 1992. Its growth was noted in localized areas at about 20 different
locations within the lake. This exotic plant has few natural enemies or controls. Its ability to
regrow from small fragments and out -compete native aquatic plant species enables it to spread
rapidly and to become a noxious weed. Dense growths of Eurasian Watermilfoil may result
in habitat degradation, pose a hazard to navigation, and are an aesthetic nuisance. To eradicate
growths of Eurasian Watermilfoil from Silver Lake, each area of growth was chemically treated
with 2-4-D in 1992 and 1993. The treatment appears to have been successful. However,
Ramsey County continues to survey the lake to evaluate the success of the eradication efforts.
Weed harvesting in the lake was discontinued pending completion of a survey confirming that
eradication was complete.
4.2.1.5 Public Use and Related Water Quality Concerns
Silver Lake is a very intensively used lake in VBWD. Its intensive use is due primarily
to the two parks located adjacent to the lake, A park on the south shore is owned by the city
of North St. Paul and includes a public swimming beach and an extensive picnic area. A
fishing pier, located within the park, was installed adjacent to the beach area in July of 1989.
The park on the north end is owned by Ramsey County and contains three picnic areas and
a public boat launch.
The primary recreational uses of Silver Lake are swimming and fishing. A 1978 DNR
recreational use survey estimated the lake supports fishing at the rate of 76 person -hours per
acre, twice the regional average. The installation of a boat access in 1984 significantly increased
fishing pressure. Other recreational uses include waterskiing, canoeing, and passive uses such
show and ice cream social on the lake.
Ramsey County indicates that the primary concern of lake users is the weed growth
throughout the shallow region of the lake. The County believes current algal levels and water
clarity are satisfactory to lake users. This observation is consistent with the results of MPCA
surveys of citizen volunteers and MPCA staff members concerning the water quality a lake
must have to fully support all types of recreational uses, including swimming. Such surveys
indicate a lake's water quality must correspond to oligo-mesotrophic conditions to fully support
swimmable and aesthetic uses (MPCA,1990). As mentioned previously, Silver Lake algal levels
(i.e„ chlorophyll a) and water clarity (i.e., Secchi disc) are within the mesotrophic category.
Based on survey results, the MPCA recommends that the Secchi transparency of a mesotrophic
lake remain greater than 2 meters a majority of the time to avoid the perception of impaired
swimming. As shown on Figure 4-2, the average Secchi transparency of Silver Lake has been
greater than 2 meters during the past six years.
In 1989, the City of North St. Paul surveyed residents as part of their water management
planning process. Approximately one-third of the survey respondents identified concerns in
the Silver Lake area. Survey results identified the following problems for Silver Lake, which
are quoted from the North St. Paul Surface Water Management Plan:
■ Sedimentation at storm sewer inlets
■ High nutrient loading
■ Extensive in -lake vegetation
f
t,
23\82\045\SEC4.RPT\KMH 4 DRAFT: June 23, 1994
■ Poor water clarity
■ Odor
■ Litter
■ Level control
■ Fertilizer control
As noted in the North St. Paul plan, water level concerns (either too high or too low) received
the most attention. The North St. Paul plan proposed that sediment be removed at storm sewer
inlets into Silver Lake in 1991.
4.2.1.6 VBWD Water Oualitv Management Goals
Silver Lake is identified as a Category I water body in Section 3.2 -- Water Quality
Management Plan, based on existing water quality data and its existing and desired recreational
uses. A Category I water body fully supports all water -based recreational activities including
swimming, scuba diving, and snorkeling. Further description of this classification is included
in Section 3.2.
Section 3.2 also shows that Silver Lake is to be managed to protect and possibly restore
its water quality. Because of its high total phosphorus and somewhat high chlorophyll a
concentrations (see Figure _), Section 3.2 also shows Silver Lake as "borderline" in terms of
the current and expected use of the lake conflicting with it existing water quality. The lake's
watershed is nearly fully developed. Additional nutrient loading due to further development
or other land use changes in the watershed is not anticipated. Future watershed management
efforts should, therefore, focus on preserving the treatment efficiency of existing runoff
detention basins and wetlands throughout the watershed. This focus will ensure that the
impacts of runoff from the lake's urbanized watershed are minimized, and that the current
water quality of the lake is preserved.
VBWD will complete hydrologic and nutrient budgets for Silver Lake, depending on the
availability of funds, See Section 3.2 — Water Quality Management Plan for more information
about hydrologic and nutrient budgets. The North St. Paul plan proposed preparation of a
water quality study in 1995 for the Silver Lake watershed.
Ramsey County requested that VBWD evaluate the current treatment efficiency of the
wetlands and basins to the north (upstream) of Silver Lake. This evaluation would determine
whether their existing treatment efficiency is within the range of expected efficiency. If the
treatment efficiency is lower than expected, VBWD will determine whether maintenance or
modification of the wetlands and basins is necessary to improve their treatment efficiency. Any
wetland modifications would have to comply with the rules of the Wetland Conservation Act
and VBWD.
VBWD will consider evaluating current treatment efficiencies of the wetlands and basins
upstream of Silver Lake in conjunction with the completion of hydrologic and nutrient budgets.
VBWD will then determine the need to modify the upstream wetlands and/or treatment basins
to improve their treatment efficiency. VBWD will also determine if maintenance alone will
provide the needed improvement. Modifications to improve treatment efficiency can be
expensive.
23\82\045\SEC4,RPT\KMH 3 DRAFT: June 23, 1994
4.2.2 Mud Lake Water Management Plan
4.2.2.1 Location and General Description
Mud Lake is a 40-acre lake (DNR #82-102P) located in Subwatershed LL4, in the City of
Oakdale, between 45th and 50th Streets North and east of Granada Avenue North. The
tributary watershed is 271 acres, and is comprised of Subwatersheds LL1 through LL4. All of
the tributary area is located within the City of Oakdale. Mud Lake is surrounded by a strip
of parkland but is in an otherwise rapidly developing watershed. The average depth of the
lake is estimated to be 4 feet. A few pockets within the lake are approximately 15 feet in depth.
Throughout the summer months, a profuse growth of water lilies covers the lake. A walking
trail follows 3/4 of the shoreline, and a dock extends out into the lake.
4.2.2.2 Drainage Patterns and Stormwater Issues
The Oakdale Surface Water Management Plan's (Oakdale plan) wetland management
classificationfor Mud Lake is protected wetland. The Oakdale plan lists the 100-year flood
elevation of Mud Lake as 995.6. The Oakdale plan also shows a proposed modification to the
Mud Lake outlet to achieve an outflow rate consistent with the plan. The Oakdale plan rated
this modification a top priority to be completed in 1991.
4.2.2.3 VBWD Water Quantity Management Goals
Stormwater management issues regarding Mud Lake are addressed in the Oakdale plan
and are the responsibility of the City of Oakdale. VBWD is aware of the proposed Mud Lake
outlet modification, but is not aware of any modifications at this time.
4.2.2.4 Water Quality, DNR Data, and Public Use
No water quality information for Mud Lake has been collected by VBWD or the City of
Oakdale, and no Lakeshore residues there arekmg part iri the MPCA's Citizen Lake
Monitoring Program. Because of its size, location, and its profuse growths of water lilies
throughout the summer, recreational use of the lake is limited to passive uses. Located in the
center of a nature preserve, the lake is used primarily for aesthetic viewing by individuals
visiting the nature preserve.
Based on its existing and desired recreational uses, Mud Lake is classified as a
Category V water body (wetland) in Section 3.2. More information about water quality
categories is available in Section 3.2.
4.2.2.5 VBWD Water Quality Management Goals
Water quality standards will be established by VBWD and implementation of the
standards will be the responsibility of the City of Oakdale. Since no water quality sampling
has been conducted on Mud Lake, the existing or potential impact of development upon the
lake's water quality is not known. It is anticipated that the water quality of Mud Lake will
further decline as development progresses. Both the City of Oakdale and VBWD are concerned
about the water quality of Mud Lake and the impact it may have on the water quality of
downstream water bodies. To minimize these adverse impacts, developers will be required to
use best management practices in the lake's tributary watershed. VBWD will consider
instituting a water quality monitoring program for Mud Lake. The water quality data will
assist VBWD in determining the impact of development on Mud Lake and the impact of Mud
Lake water quality on downstream water bodies.
23\82\045\SEC4.RPT\KMH 6 DRAFT: June 23, 1994
l
4.2.3 Echo Lake Water Management Plan
4.2.3.1 Location and General Description
Echo Lake is a small, shallow lake (DNR #82-135W) located in Subwatershed ECO1,
approximately 1/2 mile northwest of Long Lake, in the City of Mahtomedi. It has a surface
area of about 30 acres and is situated along the east boundary of the 916 Vocational -Technical
School property. The DNR's ordinary high water elevation (OHW) for Echo Lake is 996.3. The
Echo Lake tributary area is 190 acres, which is comprised of Subwatersheds ECQ1 through
EC06. Figure 2-3 shows the tributary area. Runoff from a portion of the Vocational -Technical
Institute buildings and parking lots passes through a small detention/sedimentation pond
before reaching Echo Lake. Residential development is occurring in the south and east portions
of the tributary area. The remainder of the watershed is expected to develop in the next 5
years.
4.2.3.2 Drainav-,e _Patterns and Stormwater issues
The existing outlet from Echo Lake is a deformed corrugated metal pipe approximately
15 inches in diameter, with an upstream invert at Elevation 995.5. The pipe is located on Lot 5,
Block 2 of Echo Lake 2nd Addition, under old Echo Lake Avenue, on the south side of the
wetland which comprises the southwest side of the lake. Prior to construction of the Echo Lake
Addition development, the surface overflow from Echo Lake was at Elevation 996.6. As a
result of the development, the emergency overflow was relocated to a point near the outlet pipe
and raised to Elevation 997.8. Water discharged from the Echo Lake outlet makes its way south
and east through a series of wetlands to Weber Pond.
There are three ponding areas in the Echo Lake Addition development which discharge
j to Echo Lake but are also designed to be part of the Echo Lake flood plain. Water from Echo
Lake will overflow to these ponding areas only when the Echo Lake water level is equal to or
greater than its outlet elevation (995.5).
Prior to raising the surface overflow elevation, the calculated 100-year (full development)
flood level of Echo Lake was Elevation 996.8, which includes the flood plain/wetland area east
of the lake. Under these conditions, the 100-year flood elevation of Long Lake increases 0.5 foot
above the elevation stated in the previous VBWD plan (from 943.2 to 943.7). The flood
elevation in the previous VBWD plan was based on restricted outlets from both Long Lake and
Echo Lake. As a result, additional storage is needed on Echo Lake (and Weber Pond) to
prevent this increase in the Long Lake flood elevation. This was anticipated in VBWD's
previous plan, which stated:
"A 100-year flood level" (Elevation 998) "3 feet above the normal level is proposed for
Echo Lake. The increase in storage volume is proposed to be done by the City or
developer at the time when development of this subwatershed is occurring. Storage in
the uneven terrain northwest of the lake should be preserved during development and
the lake itself should have maximum utilization of its storage volume during
development to keep outflow rates very low."
However, the previous VBWD plan did not include the Echo Lake outlet improvements
or easement acquisition as part of the Capital Improvement Program. As a result, the existing
outlet remains in place and easements still need to be acquired for the proposed higher flood
level on Echo Lake. In addition, VBWD must obtain a DNR permit to construct a new outlet
from Echo Lake.
23\82\045\SEC4.RPT\KMH 7 DRAFT: June 23, 1994
4.2.3.3 VBWD Water Quantity Management Goals
Since development is now occurring adjacent to Echo Lake, the additional storage needs
to be obtained and the implementation of a project is of high priority. VBWD considered the
following two options for obtaining additional storage on Echo Lake:
1. Lower the outlet elevation (normal water level) of Echo Lake by 0.5 feet, to
Elevation 995.0, to create additional storage without increasing the 100-year flood
level of Echo Lake. In this case, easement acquisition would be unnecessary.
Based on the results of a 1992 survey which determined the location of the 995.0
contour in Echo Lake, VBWD decided that the impact of lowering the normal
water elevation on the wetland portion of the lake (the southwest side) would be
too great. Therefore, this option was rejected.
2. Raise the 100-year flood elevation by restricting the allowable outflow, as stated in
the previous VBWD Water Management Plan. Then, additional storage is created
by increasing the 100-year flood elevation of Echo Lake to 997.6, approximately one
foot above the existing 100-year flood elevation. At the time of development, the
Echo Lake Addition developer dedicated drainage easements up to the proposed
100-year flood elevation of 997.6. However, additional easements need to be
acquired from the six other Echo Lake shoreline property owners.
VBWD believes option 2 is the most feasible option. Based on VBWD's analysis of the
watershed, the outlet from Echo Lake is proposed to be a 2-inch diameter orifice at
Elevation 995.5 (the existing outlet elevation). Then, the 100-year flood elevation would be
997.6 and the Echo Lake emergency overflow would be the low overflow point near the outlet,
at Elevation 997.8. The proposed outlet control structure would be located in a manhole in the
same location as the existing outlet pipe. This project is anticipated to be combined with the
VBWD will consider monitoring Echo Lake water levels, either using VBWD staff or
requesting that the DNR install a gage.
4.2.3.4 Water -Quality and DNR Data
Sampling of Echo Lake in 1971, 1972, 1984, and 1991 by the Watershed District and in
1975, 1977, and 1978 by the School District, has shown the lake to have variable, but relatively
high phosphorus concentrations and little thermal stratification. Echo Lake currently exhibits
relatively poor water quality. Average summer water quality data collected from the lake are
presented on Figure 4-3. Data from 1971, 1977 and 1978 are not shown because the sampling
occurred in the fall and winter. The 1991 data were compared to criteria used to denote a
lake's nutrient "status," and the effects of the nutrients on the general water quality and/or
trophic conditions of a water body (HALMS, 1988). Based on a comparison of the lake's
nutrient (i.e, total phosphorus) concentration to these criteria, Echo Lake would be assigned
a trophic status of hypereutrophic. This means that the lake is extremely rich in nutrients. An
evaluation of the effects of the nutrients on the general water quality of the lake
(i.e., chlorophyll 4 concentrations and Secchi disc transparency) also results in a hypereutrophic
classification. This means that the lake is responding to the nutrient load as expected, and that
nuisance algal blooms are a common occurrence. Due to these algal blooms, water
transparency is generally poor:
23\82\045\SEC4.RPT\KMH 8 DRAFT:, June 23, 1994
4.2.3.5 Public Use and Related Water_Ouality Concerns
Recreational use of Echo Lake is currently limited to lake residents who use the lake for
swimming, canoeing, small rowboats, and passive aesthetic viewing. Residents comment that
the lake's picturesque shoreline is reminiscent of northern Minnesota lakes, despite its poor
water quality. A variety of wildlife, birds, and waterfowl have made their homes in and
around the lake and area residents enjoy walking around the lake to view them.
The City of Mahtomedi has made plans to install a public access to increase recreational
use of Echo Lake. The access will consist of a path to carry canoes and small non -motorized
craft to the lake. Also, a City ordinance restricts lake boat use to non -motorized craft.
The current and the expected future use of Echo Lake conflict with its current water
quality. According to MPCA surveys of citizen volunteers and MPCA staff members, the lake's
current water quality places it in a category of being undesirable for swimming and boating
activities. Also, MPCA surveys indicate total phosphorus concentrations should remain below
0.050 mg/L if boating and even partial support of swimmable use is to be achieved (MPCA,
1990). Above this total phosphorus range, the frequency of transparencies less than 1 meter
and the occurrence of severe algal blooms increases dramatically. Water transparency less than
one meter and frequent algal blooms make a Take undesirable for boating and for any
swimmable use. As shown on Figure 4-3, the average summer phosphorus concentration in
Echo Lake has been consistently above 0.060 mg/L, except for a single sampling event in 1975.
The lake's average Secchi transparency has consistently been less than 1 meter (see Figure 4-3),
Chlorophyll concentrations have increased steadily since monitoring began. The 1991 summer
average of 94 mg/m3 indicates severe algal blooms occur throughout the summer months.
The DNR has no fisheries information and does not currently manage the fisheries in
Echo Lake. However, once the public access is developed, the DNR may be interested in
surveying the current fisheries of the lake. The DNR may also find it necessary to monitor the
winter oxygen concentration in the lake before making any fisheries management decisions.
The lake may be suitable for bluegills and largemouth bass, if a sufficient winter oxygen
concentration exists to permit their survival.
Echo Lake residents are concerned about the algal blooms which give the lake a green,
murky appearance during the summer months. Some residents wish to have the lake's
fisheries managed, while other residents prefer no management. Other concerns of area
residents include:
■ Maintenance of the Echo Lake water level at its historic average level. Residents
are concerned that the lake water level may rise as development occurs around the
lake.
■ Increased sediment discharge into Echo Lake as a result of construction during
development. Residents want more stringent requirements on developers to
protect the lake during future developments.
■ Inadequate treatment of stormwater from the 916 Vocational -Technical School
property, which could be improved.
■ Setbacks from the lake shoreline for future development, to preserve the native
vegetation. Preserving Echo Lake's natural shoreline is a priority management
option for the lake, since aesthetic viewing of the lake is important.
23\82\045\SEC4.RPT\KMH 9 DRAFT: June 23, 1994
■ The lake is too small for motorized craft. Therefore, residents support the City's
ordinance regarding no motorized craft on the lake.
Future urbanization along the shores and in the watershed of Echo Lake will likely lead
to further degradation of its water quality. As part of the Echo Lake Addition development
located adjacent to the east and south shores of Echo Lake, additional ponding areas were
created which will provide treatment of stormwater runoff prior to its discharge to Echo Lake,
4.2.3.6 VBWD Water Quality Management Goals
Echo Lake is identified as a Category III water body in Section 3,2 -- Water Quality
Management. Plan, based on the lake's existing water quality and its existing and desired
recreational uses. A Category II water body supports fishing, aesthetic viewing activities and
wildlife observation. Further description of water quality categories is included in Section 3.2.
The current and expected use of Echo Lake conflict with its current water quality. Future
development in the watershed is likely to exacerbate the conflict. Section 3.2 shows that Echo
Lake is to be managed to restore its water quality to remove the conflict. VBWD will complete
hydrologic and nutrient budgets for Echo Lake under existing and future watershed conditions,
depending on the availability of funds. VBWD will also continue to monitor the water quality
of Echo Lake, at least once every five years. Then, using the study and water quality
monitoring results, VBWD will review and possibly revise its management goals for Echo Lake.
4.2.4 Weber Pond Water Management Plan
4.2.4.1 Location and General Description
Weber Pond is a 7.5-acre pond (DNR #82-119W) located in Subwatershed WEB1, in the
City of Mahtomedi, adjacent to the south side of 60th Street North. The pond is split into two
marts -by the -old -stxeetcargraxie,- which -therefore-acts-as a -dam —,The -Weber -Pond laical -tributary
area is 139 acres, which is comprised of Subwatersheds WEB1 through WEB8. Since the Echo
Lake outflow (190-acre tributary area) enters Weber Pond, the total tributary area of Weber
Pond is 329 acres. Figure 2-3 shows the tributary area.
4.2.4.2 Drainage Patterns and Stormwater Issues
Outflows from Echo Lake cross 60th Street, discharging into the northwest corner of
Weber Pond. The outlet for the larger (6.5 acres), northwest part of the pond is a pipe through
the streetcar grade. The outlet for the southeast (downstream) part of Weber Pond is a ditch
which begins to overflow at Elevation 973,7. This outflow then crosses Lincolntown Avenue
into the City of Pine Springs, eventually discharging to Long Lake. The DNR's ordinary high
water elevation (OHW) for Weber Pond is 974.9.
The Weber Pond outlet through the streetcar grade collapsed in the fall of 1991, which
resulted in the flooding of 60th Street North. Emergency measures were taken on
November 20, 1991, The emergency measures consisted of removing the collapsed existing
outlet; which was comprised of 50-gallon drum segments tied together, and digging a narrow
channel with steep side slopes to replace the collapsed outlet. As approved by VBWD, the City
of Mahtomedi installed a 24-inch diameter pipe in June, 1992, as a temporary measure. The
24-inch diameter pipe is approximately the same size as the previous outlet, The temporary
pipe will be removed when a permanent outlet is constructed.
23\82\045\SEC4.RPT\KMH 10 DRAFT: June 23, 1994
Based on the following assumptions, the 100-year flood elevation for the northwest
portion of Weber Pond (6.5 acres) is 976.5 and for the southeast portion of Weber Pond (1.0
acre) is 975.5:
The collapsed outlet from the northwest portion of the pond was equivalent to a
24-inch corrugated metal pipe at Elevation 973.7,
2. Future (full) development conditions in the watershed.
3. Pre -development Echo Lake overflow conditions (996.6 overflow).
4. Normal water level for southeast portion of Weber Pond at 973.4 and ditch outlet
elevation at 973.7.
At its flood elevation of 9765, Weber Pond will inundate 60th Street North. However,
since the City of Mahtomedi will be realigning 60th Street North, VBWD does not anticipate
taking measures to reduce the flood elevation, All available flood storage is needed at Weber
Pond in conjunction with additional storage on Echo Lake to reduce flood elevations on Long
Lake. Realigned 60th Street will be located north of the existing street and become the east -
west through street for the area.
4.2.4.3 VBWD Water Quantity Management Goals
Because development is occurring in the Weber Pond watershed, replacement of the 24-
inch temporary outlet is a high priority. The size of the replacement outlet from the northern
portion of Weber Pond is proposed to be smaller than the existing outlet. Based on VBWD's
analysis, a new outlet from the northwest part of Weber Pond is proposed to be a 9-inch
diameter orifice, and the outlet from the southeast part of the pond will not be altered. Because
the outflow from Echo Lake will also be reduced, the 100-year flood elevation of the northwest
portion of Weber Pond will be unchanged as a result of the new outlet construction.
Since the flood elevation is not altered, no permanent easements need to be acquired.
VBWD anticipates combining this project with the Echo Lake outlet project (see Echo Lake
Water Management Plan section). Also, VBWD must obtain permission from the DNR to install
a new Weber Pond outlet.
4.2.4.4 Water Oualitv and Public Use Dat
No water quality data for this pond have been collected by VBWD, the City of
Mahtomedi or private citizens. The pond provides aesthetic views, stormwater detention and
runoff water quality treatment. The old streetcar grade provides a trail between the two
sections of the pond. In the past, the DNR occasionally used Weber Pond for fish rearing
purposes.
4.2.4.5 VBWD Water Oualitv Management Goals
Based on its existing and desired recreational use, Weber Pond is classified as a Category
V water body (wetland) in Section 3.2 — Water Quality Management Plan. Further description
of this classification can be found in Section 3.2.
Because the current water quality of Weber Pond appears to be consistent with its
recreational usage, future management efforts will focus on preservation of the existing water
quality. Section 3.2 shows the management action to be not determined because of the lack of
23\82\045\SEC4.RPT\KMH 11 DRAFT: June 23, 1994
water quality data. VBWD will consider collecting water quality monitoring data on Weber
Pond.
4.2.5 Long Lake Water Management Plan
4.25,1 Location and General Description
Long Lake is located in Subwatersheds LNG1 and LNG2, in the Cities of Pine Springs
and Mahtomedi. The lake has a surface area of approximately 75 acres and a maximum depth
of about 35 feet. Long Lake consists of two separate basins connected by large culverts under
Highway 36 and the adjacent service road. The north basin (in Subwatershed LNG1) is DNR
#82-118P and the south basin (in Subwatershed LNG2) is DNR #82-371W, In addition, the
wetland located north of Long Lake Road is connected to Long Lake by two concrete culverts
under the roadway. These culverts are 18 and 15 inches in diameter and are set at
Elevation 937.7 and 939,7, respectively (Long Lake's controlled outlet elevation is 937.5).
The local tributary area of Long Lake is 1,291 acres, which is comprised of Subwatersheds
LNG1, LNG2, and LL5 through LL34. In addition to runoff from its local tributary area, the
outflows from Silver Lake (466 acres), Mud Lake (271 acres) and Weber Pond (329 acres) enter
Long Lake. Therefore, the total tributary area to Long Lake is 2,357 acres. Figure 2-3 shows
the tributary area.
4.2.5.2 Drainage Patterns and Stormwater Issues
The Mud Lake and Silver Lake outflows join together in a ditch located in the City of {
Oakdale, in the northwest quadrant of the I-694 and T.H. 36 interchange; The combined
outflow crosses I-694, enters the City of Pine Springs, and discharges at the southwest shore
of the north Long Lake basin, The Weber Pond outflow crosses from the City of Mahtomedi 3'
to the City of Pine Springs atLincolntown Avenue through a 15-inch diameter culvert; water
ditch is currently a 15- to 20-foot deep ravine. According to residents, the ditch carried water
for only one to two months out of the year, prior to the start of development in the upstream R
watershed in 1992. Pine Springs residents are concerned that increased runoff volume from
upstream development will result in further ravine erosion. VBWD does not have data which
shows ravine erosion is occurring or that a sediment delta is forming at the outlet of the ravine.
Erosion of Long Lake's steep banks was a major problem, which was made more severe
by the large fluctuations in water level which the lake experienced prior to construction of the
new outlet in 1987. The lake level fluctuations were due to a small outlet under the old Soo
Line Railroad embankment (now the DNR Gateway Trail). Long Lake reached Elevation 943.4
in July; 1978. Figure 4-4, prepare by the DNR, presents historical water level data collected by
VBWD from 1969 through the present. The OHW of Long Lake is 939.4. As part of VBWD's
Project 1007, the 15-inch corrugated metal culvert was replaced with a new outlet and control
structure, located approximately 100 feet northeast of the old outlet. Although the control
structure causes Long Lake to act as a regulator for upstream inflows, lake level fluctuations
were reduced in magnitude. The Long Lake outlet structure controls the water elevation at
937.5 feet. The outlet pipe crosses the DNR trail embankment located on the south side of the
south basin. At its upstream end, the outlet pipe is a 60-inch diameter concrete pipe which
leads to the outlet control structure located on the north side of the DNR trail. Within the
control structure is a 10-inch diameter orifice which restricts the outflow from the lake until the
water level reaches Elevation 941.5, at which .point water begins to flow over a weir.
Downstream of the control structure, water flows in a 36-inch diameter corrugated steel pipe
23\82\045\SEC4.RPT\KMH 12 DRAFT: June 23, 1994
and discharges into a wetland on the south side of the DNR trail (DNR #82-373W). Water from
the wetland flows in a ditch to Lake DeMontreville,
The 100-year flood level of Long Lake was lowered about 4 feet to Elevation 943.2 as a
result of the new outlet construction. One home on the lake is still in the flood plain. The first
floor elevation of this home is at approximately 942.8; the basement is at an even lower
elevation. The owner of the home chose not to participate in VBWD's residual floodproofing
program, so the home is still in the floodplain. Another lakeshore home has a low walkout
elevation at 943.3, just above the 100-year flood elevation. It is unlikely that VBWD will lower
the 100-year flood elevation to prevent flooding of the lowest home on the lake. Without
creating additional storage elsewhere, the only way the flood elevation could be lowered is by
lowering the outlet elevation. DNR regulations will not allow lowering of the Long Lake outlet
beyond that which is specified in VBWD's DNR-approved operating plan.
4.2.5.3 VBWD Water Quantity Management Goals
VBWD computed the 100-year flood elevation of Long Lake assuming ultimate
development in the watershed and the construction of new restricted outlets for Echo Lake and
Weber Pond, in the City of Mahtomedi. Based on these upstream alterations, the Long Lake
flood level will not increase as a result of development in the upstream watershed. However,
it is important that the City of Mahtomedi maintain the culverts under Long Lake Road to
ensure that the flood storage in the wetland north of Long Lake Road is available for storm
events.
If ravine erosion is shown to be a problem on the west shore of Long Lake, VBWD will
determine if remedial measures should be taken to correct and prevent erosion problems, Such
remedial measures could include ravine restoration, pipe installation and/or additional
upstream stormwater detention.
VBWD will continue to monitor Long Lake water levels monthly and supply the
information to the DNR.
4.2.5.4 Water Oualitv and DNR Data
A 1989 DNR fisheries survey of the north Long Lake basin showed higher than local
average northern pike, panfish and bullhead catches. A 1982 DNR fisheries survey of the south
Long Lake basin found average numbers of northern pike, panfish and bullheads. Because of
the steep shores, emergent vegetation covers only a small portion of the lake surface. The 1989
DNR fisheries survey also noted water plantain and softstem bulrush on the sand delta on the
southwest side of the north Long Lake basin. Curlyleaf pondweed was the abundant aquatic
vegetation, especially in sheltered areas on the southwest and north sides of the lake. MDNR
has no plans to stock the lake with fish since there is no public access. Access can be gained
to the north basin from Long Lake Road on the north end of the lake, although this has become
more difficult since the road was raised. It is also possible to access the south basin from the
T.H. 36 south service road (Viking Drive).
VBWD collected water quality samples in 1971, 1972, 1975, 1979, 1984, 1987, 1990 and
1993. The samples were collected from the north Long Lake basin only, except for one year
when samples were collected from both the south and north basins. The lake is thermally
stratified to a depth of 10to 20 feet in summer and the cold lower waters (hypolimnion) show
almost no oxygen present. Total phosphorus concentrations are higher in the hypolimnion,
indicating that internal loading may be a significant factor in determining the water quality of
the lake. Summer total phosphorus concentrations have averaged 0.050 mg/L. Residents
23\82\045\SEC4.RPT\KMH 13 DRAFT: June 23, 1994
report that the water quality of the lake varies somewhat from year to year. During 1990, they
did not consider the water quality of the lake to be objectionable. However, during 1991,
constant algal blooms caused the lake to be excessively green throughout the ice -free period, f
and the decaying algae produced objectionable odors. During 1993, the lake was perceived by
residents to have good water quality.
Water quality data collected from Long Lake are presented on Figure 4-5. 1990 data
indicated Long Lake exhibited relatively poor water quality. In contrast, 1993 data indicated
Long Lake exhibited generally good water quality. Antecedent drought conditions may have
resulted in less flow through the lake in 1990 than in 1993. The lower flushing rate in 1990
may have resulted in a greater accumulation of phosphorus from internal loading than occurred
during 1993. The data suggest internal phosphorus loading plays an important role in the
lake's water quality.
The 1993 data were compared to criteria used to denote a lake's nutrient "status," and
the effects of the nutrients on the general water quality and/or trophic conditions of a water
body (NALMS, 1988). Based on a comparison of a lake's total phosphorus concentration to
these criteria, Long Lake would be assigned a trophic status of mesotrophic. This means that
the lake contains moderate quantities of nutrients. An evaluation of the effects of the nutrients
on the general water quality of the lake results in a classification of mesotrophic to somewhat
eutrophic. This means that the lake is generally responding to the nutrient load as expected.
A comparison of 1990 data to these criteria results in a classification of eutrophic to
hypereutrophic indicating the lake is rich in nutrients and extremely productive.
Results of a trend analysis of Long Lake water quality data showed no significant
changes in total phosphorus, chlorophyll a or transparency (Secchi disc) over the 1971 -1990
period. A significant change in all three indicators is needed to indicate a significant change
in water quality.
4.2.5.5P-ubl-i�tJseend Related�Alater-O- ual-its Coneerns - -
Recreational use of Long Lake consists of swimming (by area residents), fishing, canoeing,
sailing, waterbiking, power boating (by area residents), and passive uses, such as aesthetic
viewing. Recreational use of the lake is expected to increase if an improved access is
completed. In 1992, the DNR and the City of Mahtomedi proposed to install a public access
off of Long Lake Road. Residents of Pine Springs and Mahtomedi objected to the planned
access because they believe the lake is too small to safely accommodate power boats, visibility
problems would make it difficult to patrol the lake from the public access, no suitable parking
would be available, and the proposed access would frequently be inundated with water,
rendering it useless much of the time. The lake residents proposed a carry -on access for non -
motorized craft. The DNR would not fund the installation of the carry -on access, so the access
plan was dropped.
The current and future desired recreational uses of Long Lake were not in conflict with
its 1993 water quality. However, a conflict was noted in 1990. According to MPCA surveys
of citizen volunteers and MPCA staff members regarding lake water quality, Long Lake's
current (i.e., 1993) water quality places it in a category of being suitable for all recreational
activities, including swimming and boating activities. The lake's water quality during 1990
made it undesirable for swimming and boating activities. As shown on Figure 4-5, the average
summer Secchi value during 1990 was less than one meter and chlorophyll a concentrations
averaged 36.7 mg/m'. The MPCA has found that water transparencies less than one meter and
frequent algal blooms make a lake undesirable for boating and for any swimmable use (MPCA,
1990). These values correspond to Trophic State Index (TSI) values of 63 and 66 which indicate,
23\82\045\SEC4.RPT\KMH 14 DRAFT: June 23, 1994
frequent algal blooms occurred in the lake. The MPCA suggests a TSI value on the order of
60 as an upper limit for achieving swimmable use in this region of the state. This is also
( considered the upper limit for boating activities. The data suggest water quality variations in
Long Lake sometimes make the lake suitable for all recreational activities and sometimes make
the lake undesirable for swimming and boating activities.
Future development in the Long Lake watershed will likely lead to further degradation
of Long Lake's water quality. Additional degradation is expected to cause additional conflicts
between water quality and usage. The outflow from Long Lake flows into Lake DeMontreville,
and is a major contributor to Lake DeMontreville's phosphorus load. Therefore, additional
phosphorus loading to Long Lake will not only likely degrade Long Lake's water quality, but
will also adversely impact the water quality of Lake DeMontreville. Therefore, reduction of
existing phosphorus loadings to Long Lake and limitation of increases in future loading may
be necessary to protect and/or improve the water quality of Lake DeMontreville.
The DNR reports that there are abundant weeds and algae in Long Lake, which they
believe to be caused by excessive nutrient loading from stormwater runoff. Residents report
that a large sediment delta has formed on the south side of the north basin. The presence of
the sediment delta was also noted by the DNR in their 1989 fisheries survey. According to lake
residents, the sediment delta has been forming for the past 10 to 20 years, possibly as a result
of highway runoff. Residents are concerned that the sediment delta will keep increasing in
size. No data are available to determine whether sediment deposition is still occurring. Since
the deposited sediment is sand, it is unlikely that the sediment is coming from the ditch on the
southwest side of the lake. Any sand in the ditch flow should have settled out in the ditch,
prior to entering the lake.
4.2.5.6 VBWD Water Quality Management Goals
In Section 3.2 -- Water Quality Management Plan, Long Lake is identified as a Category
11 water body based on its existing water quality and existing and desired recreational uses.
Further description of this water quality classification is included in Section 3.2.
Because conflicts between the lake's water quality and its recreational usage as a
Category II water body sometimes occur, VBWD's goal is to restore Long Lake's water quality
to prevent such conflicts. VBWD will complete hydrologic and nutrient budgets for Long Lake
under existing and future watershed conditions, depending on availability of funds. Then,
using the study results, VBWD will review and possibly revise its management goals for Long
Lake. The goals will be based on both the recreational usage of the lake and the impact of the
Long Lake discharge on Lake DeMontreville water quality.
Assuming highway runoff is the source of the sediment delta on the south side of the
lake, VBWD will work with MNDOT to find a solution to the sedimentation problem. One
possible solution is to retrofit catch basins/manholes with sumps to trap the sediment. The
sediment would then need to be removed on a regular basis. To convert the manholes to sump
manholes may require installation of new manholes rather than retrofitting. VBWD does not
propose to remove the sediment delta, because of access problems and the anticipated high
economic cost. If MNDOT will not cooperate with such a project, VBWD will survey the extent
of the sediment delta and re -survey it annually for three years. However, it may be necessary
to verify the sediment source before proceeding. To identify the sediment source may require
the use of automatic sampling equipment in the two culvertsonthe south side of the lake.
A Category lI water body is appropriate for all recreational uses except full body contact
activities: sailboating, water skiing, canoeing, wind surfing, jet skiing.
23\82\045\SEC4.RPT\KMH 15 DRAFT: June 23, 1994
4.2.6 Capaul's Pond Water Management Plan
4.2.6.1 Location and General Description
Capaul's Pond (DNR #82-365W) is located in subwatershed DEM18, in Grant Township
and the City of Pine Springs, on both sides of the DNR Gateway Trail and approximately 1,000
feet north of the trail's intersection with T.H. 36.
The tributary area of Capaul's Pond is 155 acres, and is comprised of subwatersheds
DEM18 and DEM19. The DNR's OHW for Capaul's Pond is 980.4. The pond is made up of
seven basins which become separated when water elevations are low. The entire pond is 19
acres in size at Elevation 980; approximately four acres (three basins) are located east of the trail
and approximately fifteen acres (four basins) are located west of the trail. A culvert through
the trail equalizes the ponds on the east side of the trail with the northerly three ponds on the
west side of the trail. A six-inch diameter pipe at Elevation 981.3 through a driveway separates
the northerly three ponds from the pond south of the driveway. The low point in the driveway
is at Elevation 982.6, based on a 1992 VBWD survey.
4.2.6.2 Drainage Patterns and Stormwater Issues
The basement of a home on the pond is low enough that it has flooded at different times
in the past. According to the homeowner, basement flooding occurs when pond water levels
are about six inches above the low point in the driveway. The overflow from Capaul's Pond
is located in the ditch on the west side of the DNR's Gateway Trail, north of T.H. 36.
According to a long-time resident on Capaul's Pond, the railroad maintained the ditch from
Capaul's Pond until the railroad abandoned the track. Since that time, overflow elevations
from Capaul's Pond have varied over the years as follows:
983.1
round shot) -- 1977, determined during platting of Winmar Estates in Pine
■ 983.7 (ground shot) -- October 17, 1985, John Stine survey (DNR).
■ 982.9 (ground shot) -- April 1, 1992, Barr Engineering survey (VBWD).
■ 982.5 (culvert invert) — July 12, 1993, Metro Engineering survey (DNR).
■ 982.0 (ground shot 6 feet upstream of culvert) and
981.7 (culvert invert) -- September 3, 1993, Chuck Revak survey (DNR).
As a result of the DNR's 1992 trail construction and subsequent emergency repairs in
1993, the runout elevation became the high spot in the ditch on the west side of the trail, near
the south side of Capaul's Pond, at Elevation 982.0 (see September 3, 1993 survey results). In
response to VBWD's request, the DNR installed a permanent structure which controls the
Capaul's Pond outflow elevation at 982.5. The control structure is located in the outflow ditch,
near the pond. Depending on downstream water level conditions, the outflow elevation of
Capaul's Pond can be lowered to Elevation 981.7, the invert of the culvert located just
downstream of Capaul's Pond, on the west side.of the trail.
Overflows from Capaul's Pond occurred in 1986, 1993 and 1994. In 1993, overflow
continued from mid -July to mid -September. The 100-year flood elevation for the pond is at
Elevation 984.0, approximately 1.5 feet higher than the runout elevation. The overflow path
from Capaul's Pond follows a ditch on the west side of the DNB's Gateway Trail, flows
through a culvert which carries water from the west side to the east side of the trail and south
of T.H. 36, finally reaching a wetland basin on the east side of the trail (Pond B on Figure 4-6),
just south of T.H. 36. Prior to MNDOT's work in the area in 1987, overflow from Pond B was
to Pond-C, then southwest along the east side of the trail, to a large pond (not DNR-protected)
23\82\045\SEC4.RPT\KMH 16 DRAFT: June 23, 1994
in DeMontreville Highlands 3rd Addition (Pond 1), in the City of Lake Elmo. If overflow from
Pond I occurred, water would flow to the stream which carries water from Long Lake to Lake
DeMontreville.
MNDOT's 1987 work on T.H. 36 included construction of a new bridge over the DNR
Gateway Trail. As part of this work, MNDOT installed a 24-inch diameter culvert under the
Gateway Trail to equalize Ponds A and B (see Figure 4-6). However, this culvert was to be
blocked, in accordance with VBWD's request that flow be directed to Pond I. In 1993 VBWD
found that the blocks were not installed. As a result, the overflow direction changed. After
MNDOT's work, when water filled Ponds A and B, overflow would occur from the pond on
the west side of the trail (Pond A) prior to overflow from the pond on the east side of the trail
(Pond B). According to the DNR's September 3, 1993 survey, the overflow elevation of Pond
A was 973.2, whereas for Pond B it was 973.9.
In 1993, the overflows from Capaul's Pond filled Ponds A and B, causing overflows from
the west pond (Pond A). From Pond A, water flowed westerly and southerly, filling a series
of four depressions (Ponds D, E, F, and G). If Pond G were to overflow, water would flow to
DNR-protected wetland #82-372W (Pond H) in Pine Plantation, in the City of Pine Springs. It
F
that in 1993 water from Capaul's Pond did not reach Pond H. If overflow from Pond
Ii occurred, water would flow to the south basin of Long Lake (DNR-protected wetland #82-
371W). Therefore, Capaul's Pond was considered part of the Long Lake tributary area. A low
home on Pond H (#82-372W) in the Pine Plantation development, would be flooded prior to
overflow from the pond. As a result, the VBWD Managers voted in 1987 for MNDOT to direct
the Capaul's Pond overflow to Pond I, since there are no low homes on that pond and it
appeared to be the existing overflow route.
In January, 1994, VBWD decided that any overflows from Capaul's Pond should again
be directed to the east side of the DNR Gateway Trail south of T.H. 36 and to the pond in
DeMontreville Highlands 3rd Addition (Pond I). VBWD based its decision on evidence of past
Capaul's Pond overflows flowing to the east side of the trail and the inundation of many trees
in the depressions on the west side of the trail (Ponds A, D, E, F and G). VBWD also decided
that the Capaul's Pond overflow elevation should be maintained at Elevation 982.5 or higher.
In response to VBWD's request and in cooperation with the City of Lake Elmo, the DNR
lowered the overflow on the east side of the trail (Pond B) and unblocked the culvert under the
access trail from the City of Lake Elmo's DeMontreville Park.
DNR Trails and Waterways wishes to lower the overflow elevation to protect the DNR
Gateway Trail from erosion. Considerable slumping of the trail into the wetlands occurred in
the summer of 1993, as a result of the high water elevations. Based on the water levels in the
different basins of Capaul's Pond, it appears that the DNR may have accidentally plugged the
east end of the equalizer culvert when they repaired the slumped portions of the trail.
Although overflows are infrequent, now that the runout elevation of Capaul's Pond is
lower (from 982,9 to 982.5 or less), more frequent overflows from Capaul's Pond are likely,
sending more water downstream to the pond in DeMontreville Highlands 3rd Addition
(Pond 1). In addition, if development is proposed in the Capaul's Pond tributary watershed,
more stormwater runoff will be generated which may cause Capaul's Pond to overflow more
frequently.
23\82\045\SEC4.RPT\KMH 17 DRAFT: June 23, 1994
4.2.6.3 Water Quality Data, DNR Data. and Public Use
Current active use of the pond is limited to the few property owners on the pond; passive
use is available to trail users who pass by the pond. No water quality or fisheries data is
available for the pond. The DNR has no management plans for the pond.
4.2.6.4 VBWD Water Quality Management Goals
VBWD will work with the DNR to monitor the impacts of the Capaul's Pond overflows
on the pond in DeMontreville Highlands 3rd Addition. If overflows negatively impact the
pond, VBWD will consider preparing a feasibility study to determine whether water should
continue to be directed to the pond in DeMontreville Highlands 3rd, or if the water should be
directed to the pond in Pine Plantation, eventually reaching Long Lake. Then, the need for an
outlet from either of the ponds will need to be determined. If an outlet is needed, VBWD will:
Determine the impact of the additional water on Long Lake and/or Lake
DeMontreville.
2. Investigate the possibility of acquiring the flood -prone property on Capaul's Pond
and possibly raising the runout elevation of Capaul's Pond.
3. Prepare cost estimates for all options.
VBWD will consider preparing hydrologic and nutrient budgets for Capaul's Pond to
assist in determining the impact of the additional water on the water quality of Long Lake or
Lake DeMontreville. Prior to preparing the budgets, VBWD will collect water quality samples
from Capaul's Pond to determine its existing water quality. VBWD will consider preparing a
bathymetric map at the time water quality samples are collected.
4=—L—ake e on reville Water danagement�Plan
4.2.7.1 Location and General Description
Lake DeMontreville (DNR #82-101P) is located in subwatershed DEM1, in the northwest
corner of the City of Lake Elmo. Lake DeMontreville is about 150 acres in area and has a
maximum depth of about 29 feet. The Lake DeMontreville tributary watershed is 1,220 acres
and is comprised of subwatersheds DEMI - DEM6, DEM8 - DEM14, DEM16, DEM18 and
DEM19. The tributary area includes the Capaul's Pond outflow which flows to the pond in
DeMontreville Highlands 3rd Addition (in DEM2). Since the Long Lake outlet stream enters {
the north shore of Lake DeMontreville, the total tributary area, including the Long Lake
watershed (2,357 acres), is 3,577 acres. Figure 2-3 shows the tributary area. Another stream
enters the north shore of Lake DeMontreville, approximately 2,000 feet east of the Long Lake €
outlet stream. This stream carries water from the tributary watershed northeast of the lake,
including 353 acres in Grant Township. Less than half of the watershed. in Grant Township is
currently developed and it contains many wetlands. The land use plan calls for the area in
Grant Township to be developed into five -acre lots. Because of the proposed future land use
and number of wetlands, the impact of future development in Grant Township on Lake
DeMontreville water quality is expected to be minimal. This is especially true since the major
contributor of nutrients to Lake DeMontreville is the outflow from Long Lake.
The Lake DeMontreville shoreline is in private ownership and largely developed.
However, most of the eastern shoreline of Lake DeMontreville is owned by religious groups;
which developed the properties as retreat centers and monasteries. As a result; the amount of
23\82\045\SEC4.RPT\KMH 18 DRAFT: June 23, 1994
development on the east shore is minimal with large areas of open space. Large numbers of
waterfowl and wildlife have been sighted on or near Lake DeMontreville, especially near this
open space area.
4.2.7.2 Dram&1zePatterns and Stormwater Issues
The water level of Lake DeMontreville is controlled by the Lake Olson outlet. The OHW
of Lake DeMontreville is 930.0 (the same as Lake Olson). See the Lake Olson Water
Management Plan section for a discussion about water levels and the outlet.
4.2.7.3 Water Quality and DNR Data
The DNR currently manages Lake DeMontreville for largemouth bass, bluegill, and
crappie. The lake's native fish population reproduced well in the past, and is currently
reproducing well. For this reason, no stocking has occurred or is planned for the lake. Walleye
have not been found in the lake, and the DNR has no plans to introduce walleye through
stocking: The lake presently has. a high northern pike population, which makes walleye
fingerling stocking unfeasible. Although fish are not stocked in the lake, the DNR periodically
removes sunfish to stock other lakes.
In 1986, the DNR began a 12-16 inch slot size limit on largemouth bass to control bluegill
abundance in both Lakes DeMontreville and Olson. The slot size limit resulted in the
development of a good largemouth bass population but did not improve the bluegill
population. In the fall of 1993, the DNR decided to continue the slot size limit but shifted the
emphasis from improving the bluegill population to maintaining a quality largemouth bass
population.
No winterkills have been reported since 1960. It appears that winterkills are more
frequent when water levels drop to the range of Elevation 922 to 924. Lake DeMontreville was
stocked repeatedly until 1975, mainly with northern pike. A 1979 survey found good spawning
conditions for panfish and only fair .northern pike spawning conditions. A wetland area
adjacent to the northwest shore was previously used by the DNR and local citizens as a
cooperative rearing pond for northern pike. During rebuilding of DeMontreville Trail, the
water level control structure for the spawning area was removed. As a result, the wetland area
is no longer maintained by the DNR, but is used by fish for spawning, except in drought years.
Water quality data have been collected from Lake DeMontreville on a regular basis since
1971, VBWD collected water quality data during 1971,1972, 1979, and 1990. The Metropolitan
Council collected data during 1980, 1984 and 1991, and the Tri-Lakes Association collected
samples in 1981. Citizen volunteers have collected Secchi disc transparency data from the lake
each summer since 1971 as a part of the MPCA Citizen Lake Monitoring Program. The average
summer total phosphorus, chlorophyll a, and Secchi disc transparency data are summarized in
Figure 4-7. The lake has a stable thermocline throughout the summer, with thermal
stratification noted at about 20 feet.
In 1990, VBWD began collecting water quality samples from Lake DeMontreville once
every three years. VBWD, in cooperation with the Metropolitan Council's citizen -assisted lake
monitoring program, collected data from the lake in 1993. VBWD trained a volunteer to collect
the samples. In subsequent years, data will be collected by VBWD every three years, using a
volunteer whenever possible, However, Secchi disc data will continue to be collected on an
annual basis by a volunteer as a part of the MPCA Citizen Lake Monitoring Program. In 1993,
VBWD also trained a volunteer to collect samples from the stream which carries water from
Grant Township to Lake DeMontreville. Stream samples were collected at various times during
23\82\045\SEC4.RPT\KMH 19 DRAFT: June 23, 1994
the spring through fall period of 1993 and analyzed for phosphorus, nitrogen and total
suspended solids. VBWD plans to collect stream samples annually.
In recent years, the water quality of Lake DeMontreville has ranged from relatively good
during the early summer period to relatively poor during the late summer period (see Figure
4-8). The Secchi disc transparency data were compared to criteria used to denote the effects
of nutrients on the general water quality and/or trophic conditions of a water body (NALMS,
1988). Based on these criteria, Lake DeMontreville would be assigned a trophic status of
mesotrophic during May through June, and would be assigned a trophic status of eutrophic
during July through September. This means that the lake's water transparency is relatively
good during the early summer period. However, algal blooms throughout the late summer
period result in poor water clarity.
During 1989 and 1990, algal blooms during the late summer period were more severe
than algal blooms noted during 1988, 1991, 1992, and 1993 (see Figure 4-8). The water
transparency of Lake DeMontreville was within the hypereutrophic category during a portion
of the late summer period during 1989 and 1990. The water transparency remained within the
eutrophic category during the late summer period of 1988, 1991, 1992, and 1993. The data
indicate water quality problems due to late summer algal blooms occur on an annual basis, but
the severity of the blooms varies somewhat from year to year, in response to variations in
climate and weather.
Historical total phosphorus, chlorophyll a, and Secchi disc transparency averages (see
Figure 4-7) indicate the water quality of Lake DeMontreville has varied somewhat from year
to year. Results of a trend analysis of Lake DeMontreville water quality data showed no
significant changes in total phosphorus, chlorophyll . or transparency (Secchi disc) over the
1971 - 1990 period. A significant change in all three indicators is needed to indicate a
significant change in water quality.
The long term average summer total phosphorus concentration from the take's epilimnion
is 0.044 mg/L indicating the lake, on average, is eutrophic and rich in nutrients during the
summer. The 1993 data were compared to criteria used to denote a lake's nutrient "status"
(NALMS, 1988). Based on this comparison, Lake DeMontreville would be assigned a trophic
status of mesotrophic. This simply means that the lake has a moderate quantity of nutrients.
The data suggest that Lake DeMontreville exhibited better water quality in 1993 than occurred
in previous years.
The long term average epilimnetic summer chlorophyll A concentration of 33.3 mg/m3
indicates the lake responds to its nutrient load by producing expected algal blooms. A trophic
status classification of eutrophic would result from these chlorophyll data.
During the period 1971 through 1993, the average summer water transparency has varied
from mesotrophic to eutrophic. The summer average suggests water transparency varies from
relatively good to poor. However, the average value fails to depict the annual change from
relatively good water transparency during the early summer period to poor transparency
.during the late summer period. Therefore, even during years when the summer average
suggested the lake's water transparency was good, water quality problems were noted
throughout the late summer period.
Lake DeMontreville was treated regularly with an algicide (copper sulfate) during the
1970's, but was not treated during the period 1978 through 1990. During the period 1991
through the present, the lake has been treated with copper sulfate each summer to control its
algal population. A professional was hired to complete the treatment, which was coordinated
f
23\82\045\SEC4.RPT\KMH 20 DRAFT: June 23, 1994
by the Lake DeMontreville/Olson Association. The data suggest that a temporary reduction
in the lake's algal population occurred during July of 1991 as a result of the algicide treatment
(see Figure 4-8).
Problems with aquatic vegetation in recent years necessitated chemical treatment in
private beach areas around the lake. Heavy growths of Curleyleaf Pondweed occur each year
during June and growths of Northern Milfoil occur during July through August. The lake was
chemically treated to control weeds during 1991 through 1993. Specifically, an area that
included 2,959 feet of shore and extending approximately 150 feet from shore was chemically
treated. This is the maximum allowed by the DNR, which is 10% of the littoral area.
Treatment was completed by a professional, and coordinated by the Lake DeMontreville/Olson
Association.
4.2.7.4 Public Use and Related Water Oualitv Concerns
Lake DeMontreville is very heavily used for a wide variety of recreational uses. These
uses include swimming, fishing, powerboating, waterskiing, canoeing, sailing, and passive uses
by lake residents and park attendees. A public boat access was constructed in 1983 on the
northwest shore of Lake DeMontreville, off DeMontreville Trail (County Road 13). Since Lake
DeMontreville and Lake Olson are joined by a channel, the access can also be used for Lake
Olson. The number of individuals accessing the lake is limited by the 17 parking spaces.,at the
public access. However, residents report that more than 17 vehicles park at the public access.
A DNR recreational survey completed in 1980, prior to construction of the public access,
indicated fishing pressure in the lake was 104.6 angler -hours per acre, which is over two times
the Metro Region median. Boat anglers comprised approximately two thirds of all anglers.
Although the lake does not have a public swimming beach, the lake is heavily used for
swimming. Residents have private swimming beaches, which receive heavy usage during the
summer months. Swimming lessons are offered at the lake each summer, and from 10 to 20
individuals generally participate.
Area parks and trails increase the usage of the lake by the public. DeMontreville Park
is located northeast of the lake. The park contains ball fields and soccer fields, in addition to
space for passive recreational activities. Also located near the lake is the DeMontreville Wildlife
Area. This is a wildlife park with trails to enable people to enjoy the natural surroundings and
view the wildlife. The City of Lake Elmo and Washington County have made plans to establish
walking/biking trails along roads around the lake. Washington County constructed a trail
along a portion of County Road 13.
Two local organizations are currently involved in efforts to preserve and improve Lake
DeMontreville's water quality: the Lake DeMontreville/Olson Association and the Tri-Lakes
Association. The Lake DeMontreville/Olson Association consists of residents of Lake
DeMontreville and Lake Olson, while the Tri-Lakes Association also includes residents of Lake
Jane.
The current and expected future use of the lake conflict with its current late summer
water quality. The average summer water quality, however, is consistent with its existing and
desired future uses. Historical data suggests that conflicts during the late summer period occur
annually and the degree of conflict is generally worse than was observed during 1993. As
shown on Figure 4-8, the summer Secchi values during July through August have generally
been within the eutrophic range during the past six years.
23\82\045\SEC4.RPT\KMH 21 DRAFT: June 23, 1994
Section 3.2 -- Water Quality Management Plan identifies Lake DeMontreville as a
Category I lake, based on its existing and desired recreational uses. Further description of this
water quality classification is included in Section 3.2.
4.2.7.5 VBWD Water Quality Management Goals
Future development in the Long Lake watershed is more likely to lead to further
degradation of Lake DeMontreville's water quality than future development in the Lake
DeMontreville watershed, based on current land use plans. Because Lake DeMontreville's
current water quality is in conflict with its usage, additional degradation is expected to cause
additional conflicts with lake usage. The major source of water, and phosphorus, for the lake
is inflow from Long Lake. An additional inflow occurs from Grant Township through culverts
under T.H. 36 west of DeMontreville Trail. Additional phosphorus loading to Long Lake from
development in its upstream watershed will impact the water quality of Lake DeMontreville.
Therefore, reduction of existing phosphorus loading to Long Lake and limitation of increases
in future loading may be necessary to protect and/or improve the water quality of Lake
DeMontreville. Management plans for Long Lake must be considered when developing
management plans for Lake DeMontreville.
As shown in Table 5 of Section 3.2 -- Water Quality Management Plan, VBWD's
management goal for Lake DeMontreville is restoration of the lake's water quality so that the
current and future desired recreational use no longer conflict with the water quality during the g
late summer period.
VBWD will pursue completion of hydrologic and nutrient budgets for Lake
DeMontreville, depending on the availability of funds. VBWD will then establish management
goals for the lake. Because the water quality of Lake DeMontreville is largely determined by
phosphorus loading from Long Lake, the water quality necessary to achieve Lake
DeMontreville water quality goals will be considered when the Long Lake water quality goals
am —determined. —
4.2.8 Lake Olson Water Management Plan
4.2.8.1 Location and General Description
Lake Olson (DNR #82-103P) is located in subwatershed OLS1, in the northwest corner of
the City of Lake Elmo. Lake Olson has a surface area of about 100 acres and a maximum depth
of about 20 feet. Lakes Olson and DeMontreville are joined together by a channel, located near
the south end of Hill Trail North, which is of adequate capacity to enable them to react to !
runoff as a single lake.
The Lake Olson tributary watershed area is 775 acres, including the areas tributary to the
Olson Lake Estates Development, and is comprised of subwatersheds OL1 - OL25, and OLSI.
Excluding the Olson Lake Estates 486-acre tributary area (subwatersheds OL-1 to OL-12, OL-15,
OL-16, and OL-18) the area tributary to Lake Olson is 289 acres. Since Lake DeMontreville
(3,577 acres) flows into Lake Olson, the total tributary area is 4,352 acres, including the Olson
Lake Estates tributary area, or 3,866 acres, excluding the Olson Lake Estates tributary area.
Current inflows to Lake Olson are mainly from Lake DeMontreville.
The Lake Olson shoreline is largely in private ownership and is 90% developed. Three -
fourths of the Lake Olson tributary watershed is developed or currently under development.
The majority of the undeveloped area is located between 40th and 45th Streets North and east
23\82\045\SEC4.RPT\KMH 22 DRAFT: June 23, 1994
of I-694, in the City of Oakdale. This undeveloped area is comprised mainly of subwatershed
OL-17, and VBWD acknowledges that this area may be landlocked.
4.2.8.2 Drainage Patterns and Stormwater. Issues
The Lake Olson outlet, constructed in 1987 and located on Hidden Bay Road, controls the
water elevation of both Lake Olson and Lake DeMontreville. As part of VBWD's Project 1007
construction, the old Lake Olson outlet, which consisted of a 72-inch pipe and headwall at
929.9, leading to a 30-inch pipe, was replaced with a new outlet which controls the water
elevation at Elevation 928.35. The new outlet pipe is in approximately the same location as the
old outlet pipe. The outlet now consists of 30-inch diameter pipes into and out of the control
structure, which is a stop -log weir inside a four -foot diameter manhole. The stop logs can be
removed to lower (drawdown) the Lakes Olson and DeMontreville water level in anticipation
of heavy spring runoff events. In accordance with VBWD's DNR-approved Lake Olson
operating plan, the lowest allowable drawdown is 926.5; at all other times of the year the
control elevation is to be maintained at Elevation 928.35.
Water from Lake Olson flows to Deer Pond, the outlet of which was also lowered, from
approximately Elevation 924.0 to Elevation 918.0, as part of VBWD's Project 1007. The Deer
Pond outflow combines with the Lake Jane/Hedges Pond outflow and discharges to Crombie
Pond.
The OHW of Lakes Olson and DeMontreville is 930.0. The highest recorded water level
on Lakes Olson and DeMontreville was 930.4, in July, 1984, prior to construction of
Project 1007. Prior to construction of the new outlet, lake elevations of 930 or higher were
common. Since construction of the new outlet in 1987, the highest recorded water level was
929,0, in July, 1993, following months of above -normal precipitation. Figure 4-9, prepared by
the DNR, shows historic lake levels from 1960 to the present. VBWD began measuring the
Lake DeMontreville/Olson water levels in 1969. As of result of the new outlet construction,
the 100-year flood level of the lakes was lowered from 931,9 to 931.5, One home was in the
flood plain prior to construction of the new outlet. There are now no homes in the flood plain
of Lakes Olson and DeMontreville.
Low water was a problem in the past and both Lakes DeMontreville and Olson were
reported to have dried up in the 1930's. Residents report that the channel from Lake
DeMontreville to Lake Olson dried up in 1969. Winterkills of fish were noted by the DNR in
1947-48, 1950-51, and 1955-56. Pumping operations were conducted on Lake Olson from a
Jordan well on the south side of the lake. Pumping brought higher water levels on both lakes
until 1965 and improved winter conditions. The pump has not been used since it was shut off
in 1965. The pump and pumphouse were not removed and are located next to the residence
at 4719 Olson Lake Trail
An intercommunity problem began in 1990 which involves the Cities of Oakdale and
Lake Elmo regarding discharge from a pond in an Oakdale development to Lake Olson, located
in Lake Elmo. The development is named Olson Lake Estates, and is located west of Olson
Lake Trail (CSAH 13) and south of 50th Street North. Olson Lake Estates is located in
watershed OL-18 (see Figure 2-3) and the area tributary to the development includes
watersheds OL-1 through OL-12, OL-15, OL-16 and OL-18. The immediate tributary area to
the large pond in Olson Lake Estates (DNR #82477W) is 84 acres. Including the upstream
watershed, the total drainage area to the pond is 486 acres. Approximately half of the tributary
watershed is located west of I-694. The intended watershed outlet was to be -a storm sewer
from the pond to the culvert under Olson Lake Trail and then overland about 300 feet to Lake
Olson.
23\82\045\SEC4.RPT\KMH 23 DRAFT: June 23, 1994
The design of VBWD's Project 1007 included an outlet for portions of this watershed.
This outlet was constructed in 1990 as part of the Olson Lake Estates development. When the
VBWD permit for the Olson Lake Estates development was approved, it permitted the
construction of an outlet at Elevation 952.0 from the storage area in OL-18 (DNR wetland #82-
477W). The pond in subwatershed OL-18 did not have a surface water outlet (landlocked) prior
to reconstruction of the pond as part of the Olson Lake Estates development. The outlet from
subwatershed OL-18, constructed in 1990, was connected to an existing culvert under Olson
Lake Trail. However, a drainage easement did not exist across the property between Olson
Lake Trail and Lake Olson. Because of concerns regarding water quality, increased flow
duration, and drainage easements, the City of Oakdale voluntarilyplugged the Olson Lake
Estates pond outlet in July, 1990. However, since the Olson Lake Estates pond was not
designed to operate as a seepage pond, a project is needed to carry water from the Olson Lake
Estates pond to an eventual destination point.
Above -average rainfall in the spring and early summer of 1993 brought substantial
inflows to the Olson Lake Estates pond. VBWD declared an emergency on June 22, 1993, when
the pond water level reached Elevation 961, about one foot below the lowest basements.
VBWD ordered pumping of the pond to lower the water level to Elevation 952, Water was
pumped from the north end of the pond to a catch basin at 49th Street North and Helmo
Avenue North. The water eventually reached Long Lake. The pump was shut off and
removed from the pond on July 30, 1993. On August 12, 1993, pond water levels approached
Elevation 962 and VBWD declared another emergency. The plug was removed from the pond
outlet pipe on August 13, 1993 and water was discharged directly to Lake Olson, The City of
Oakdale replaced the plug in the pond outlet pipe on September 21, 1993, after the pond
reached Elevation 952.
During the week of April 25, 1994 nearly 4 inches of precipitation occurred from several
intense storms and consequently the level of the pond rose to Elevation 962.3 on May 2, 1994.
On May 5, 1994 the VBWD managers voted to perform a one-time alum treatment of the pond
and-then-disch-arue-toLake-0lsnn-qhnrf1v-th-erPaftar T-hia
approvals and acquisition of a temporary easement for the discharge pipe to Lake Olson.
Following discussions with DNR staff, VBWD notified the DNR Division of Waters of its
intended -discharge, and a Special Permit was granted on May 6, 1994 from the DNR Division
of Fish and Wildlife to apply alum to the pond. The pond was treated with alum on May 7,
1994 and discharge to Lake Olson began May 19, 1994 following the signing of the necessary
temporary easement.
When the Olson Lake Estates pond water level is at Elevation 932.0, the pond can store
128 acre-feet before reaching the design 100-year flood elevation of 967; the pond can store 134
acre-feet before reaching the emergency overflow elevation of 967.5. These flood elevations are
based on the pond outlet functioning as originally designed by the developer. In addition,
when the Olson Lake Estates pond water level was near Elevation 957, VBWD calculated a
seepage rate of approximately 0.5 acre-feet of water per day from the pond to the groundwater
based on water level measurements.
If the pond exceeded its overflow elevation, water would eventually reach Lake Olson,
Above Elevation 965.0 water begins to backflow into the streets through catch basins in the
Olson Lake Estates development. Above Elevation 967.5, water will overtop the pond
embankment and flow into 45th Street North. When the water level in 45th Street North
exceeds Elevation 967.2, water will flow between two homes located on the east end of 45th
Street North and proceed down the hill to the ditch along Olson Lake Trail. This discharge will
then flow in the ditch and enter the culvert which crosses Olson Lake Trail, eventually entering
Lake Olson.
23\82\045\SEC4.RPT\KMH 24 DRAFT: June 23, 1994
The three homes along the southwest side of the Olson Lake Estates pond, on Upper 45th
Street North, were built below the minimum building elevation (El. 966.9) set by the VBWD
permit for the project. The lowest home (Lot 2, Block 3) has a basement elevation of 961.7 and
a top of foundation elevation at 969,9. Another low home (Lot 1, Block 3) has a low window
sill elevation of 965.5 and an estimated basement elevation of 963.5. The third low home (Lot 3,
Block 3) has a basement elevation of 964.3. If water levels in the pond remain high for
extended periods of time, these basements could be flooded by groundwater moving
horizontally from the pond.
VBWD's previous Water Management Plan showed the 100-year flood elevation of Lake
Olson to be 931.5. This flood elevation was obtained from hydrologic computer models which
were used in the design of Project 1007. The computer model included watersheds OL-17
through OL-25 as tributary to Lake Olson. However, watersheds OL-1 through OL-12, OL-15
and OL-16, which are naturally tributary to watersheds OL-17 through OL-25, were not
assumed tributary in the computer model. Therefore, VBWD determined the impact of the
additional tributary area on the flood level of Lake Olson. The results of the hydrologic
computer modeling showed that there was a threat of additional flooding if six or more inches
of runoff over the watershed were to occur. The threat was found to be alleviated if the control
elevation of Lake Olson could be lowered 0.5 foot, from 927.0 to 926.5. In March, 1991, VBWD
received approval from the DNR to modify the Lake Olson operating plan to allow for the
additional lowering of the lake water level when high spring runoff is imminent. Information
regarding this request and DNR approval is available from VBWD. No negative impacts
further downstream in the system were predicted in the modeling.
4.2.8.3 VBWD Water Quantity Management Goals
At various times between 1990 and 1993, VBWD considered multiple options for the
ultimate discharge of the water from the Olson Lake Estates pond, many of which were
suggested by Lake Olson area residents. The options can be generally grouped into the
following categories: discharge to Lake Olson, discharge to Project 1007 system, downstream
of Lake Olson, treatment of Olson Lake Estates pond water, and other combinations of these
discharge options.
The existing control structure for the Olson Lake Estates pond is located north of the 45th
Street North cul-de-sac, inside the 15" RCP on the east side of catch basin #25. From this point,
the pipe system connects to the existing manhole and storm sewer on the west side of Olson
Lake Trail. This existing manhole and storm sewer system is undersized and does not include
piping from the pipe under Olson Lake Trail to Lake Olson. In addition, re-routing of the main
inlet pipe to the north end of the Olson Lake Estates pond to maximize water quality benefits,
should be included in each of the outlet options listed below.
Based on public workshops addressing the various discharging options from the Olson
Lake Estates pond, VBWD identified the following four options for the pond outlet:
1. Outlet to Lake Olson without treatment of pond water. This option would include
re-routing of the pond's main inlet pipe and upgrading the downstream system to
handle the pond outflows.
2. Outlet to Lake Olson with treatment of pond water. This option would include the
pipe system improvements in option 1, along with treatment of the pond inflows
by a continuous alum treatment facility or an acceptable equivalent treatment
methodology.
23\82\045\SEC4.RPT\KMH 25 DRAFT: June 23, 1994
3. Outlet the pond by constructing a bypass to or beyond Crombie pond. This option i.
would include re-routing the pond's main inlet pipe along with installing
approximately 6,000 feet of pipe leading to or immediately downstream of Crombie
pond.
4. Outlet the pond by constructing a bypass to the Eagle Point Lake watershed. This
option would also include re-routing the pond's main inlet pipe along with $
installing at least 10,000 feet of pipe leading to the Eagle Point Lake watershed.
VBWD will complete a study to determine the most appropriate option considering the
cost effectiveness of the project along with its water quality benefits. VBWD may consider
adding the Echo Lake outlet, Weber Pond outlet and/or Lake Elmo outlet pipe extension
projects to any of these options (see the appropriate individual water management plan
section). Estimated costs for each of these options are included in the Capital Improvements
section of this plan:
A DNR permit will be required for the placement of pipe within the lakebed of Lake
Olson.
VBWD will continue to measure Lake levels on a monthly basis and send this
information to the DNR.
Because the Lake Olson pump has not been used for almost 30 years and it poses an
environmental threat to the Jordan aquifer, the well should be abandoned. The well
abandonment costs are likely to be approximately $5,000, which should be paid for by the
owner of the well, the Lake DeMontreville/Olson Association.
4.2.8.4 Water Quality and DNR Data j
—BecauseFLakes ille ansonare connected -by a cFiannne ich causes them
to react to runoff as a single lake, the water quality of the two lakes is similar. Total
phosphorus concentrations in Lake Olson have averaged 0.045 mg/L during the summer
growing season, compared with 0.043 mg/L for Lake DeMontreville. Since Lake Olson is
shallower than Lake DeMontreville, Lake Olson does not usually thermally stratify. When the
lake does stratify, it is only for short time periods, after which mixing occurs. Apparently, the
lake mixes frequently during the ice -free period.
Since the water quality sampling programs and water quality of Lakes Olson and
DeMontreville are nearly identical and to prevent duplication, only differences between the two
lakes are discussed in the following paragraphs. The reader is referred to the discussion of the
water quality sampling program and the water quality of Lake DeMontreville in Section 4.2.7.3.
Although the water quality sampling programs for Lakes DeMontreville and Olson have
generally been identical, a few exceptions have occurred. VBWD collected samples from Lake
Olson during 1984, and the Metropolitan Council collected samples from Lake DeMontreville
that year. In 1980, the Tri-Lakes Association collected samples from Lake Olson, while the
Metropolitan Council collected samples from Lake DeMontreville that same year.
The water quality of Lake Olson has generally been similar to the water quality of Lake
DeMontreville during the period of record. During the early 1970's, the water quality of Lake
Olson was better than the water quality of Lake DeMontreville. From the mid 1970's to 1990,
the water quality of the two lakes was very similar. However, a difference in water quality was
again noted in 1991 and 1992. Both lakes were treated those years with an algicide to reduce
23\82\045\SEC4.RPT\KMH 26 DRAFT: June 23, 1994
algal blooms and it appears that the algicide was more effective in Lake Olson than in Lake
DeMontreville. A possible explanation is that in addition to applying algicide, more residents
on Lake Olson treated weeds than on Lake DeMontreville. Since the weed treatment also
contains copper sulfate, it will act as an algicide. As shown in Figures 4-8 and 4-11, the water
transparency of Lake Olson was better than the water transparency of Lake DeMontreville
during July and August of 1991 and 1992.
The additional improvement in water quality noted in Lake Olson during 1991 and 1992
made the lake more enjoyable for swimming during the late summer period. Survey results
from the MPCA indicate most people would associate transparencies of less than 1.5 meters as
either "swimming impaired" or "no swimming". Based on the results of its surveys, the MPCA
recommends that the Secchi disc transparency of a lake remain greater than 2 meters a majority
of the time to avoid the perception of impaired swimming. During 1991 and 1992, .application
of an algicide improved the lake's water transparency from around 1.5 meters to around 2.5
meters. Although improved water transparency was noted throughout the late summer period,
following application of the algicide, a decline was noted as algal growth replaced the loss
caused by the algicide. Water transparency was greater than one and one half meters during
the 1991 and 1992 late summer periods, except for September of 1991 when water transparency
declined to less than one meter.
Data from Lake Olson during 1990 indicate Aphanizomenon flos-aquae was one of two
dominant blue-green algae present during the late summer period. Nuisance algae (particularly
Aphanizomenon flos-aquae) appear to become resistant to copper sulfate treatments over a period
of time. Any algicide treatment program for Lake Olson is likely to decrease in effectiveness
over the growing season, possibly requiring the need for more frequent sulfate later in the season to achieve the same results. applications of copper
Historical total phosphorus, chlorophyll a, and Secchi disc transparency
growinseason
averages from Lakes Olson and DeMontreville are very similar to one anther.. Long term
average growing season total phosphorus concentrations for Lakes Olson and DeMontreville
are 0.038 mg/L and 0,044 mg/L, respectively, Lon term average chlorophyll
a concentrations are 29.4 mg/ma and 33.3 mg/m3 for Lake Olson anda DeMontreville,
respectively. Likewise, long term average growing season Secchi disc transparencies for Lakes
Olson and DeMontreville are 1.9 meters for each lake.
Results of a trend analysis of Lake Olson water quality data showed no significant
changes in total phosphorus, chlorophyll a or transparency (Secchi disc) over the 1971 - 1990
period. A significant change in all three indicators is needed to indicate a significant change
in water quality.
Lakes Olson and DeMontreville were chemically treated to control weeds during 1991
through 1993. The maximum allowable area (10% of the littoral area) was treated in both lakes.
The specific dimensions of the treatment areas differed somewhat, however. In Lake Olson,
an area that included 3,224 feet of shore and extending approximately 100 feet from shore was
chemically treated. In Lake DeMontreville, the cherically treated area included 2,959 feet of
shore and extended approximately 100 feet from shore.
4.2.8.5 Public Use and Related Water Quality Concerns
The City of Lake Elmo and residents around Lake Olson expressed concern about the
effect of the additional water from the Olson Lake Estates pond on Lake Olson water quality.
In response to the concerns, VBWD directed its engineer to determine the water quality impacts
of the Olson Lake Estates pond discharge on Lake Olson. The results of the engineer's water
23\82\045\SEC4.RPT\KMH 27
DRAFT: June 23, 1994
lity modeling studies are contained in reports dated April 16, 1991 and December 20, 1991.
latter report includes corrections to the first report and includes the effect of seepage. Both
orts are available from VBWD, but only the results of the December 20, 1991 report are
ussed here. The mean summer average phosphorus concentration for Lake Olson (through
0) is 0.045 mg/L.The water quality modeling predicted that, under ultimate development
1 ditions, the mean summer average phosphorus concentration of Lake Olson would rise to
lae
47 mg/L without the addition of water from the Olson Lake Estates pond, and would rise
0.049 mg/L with the addition of water from the Olson Lake Estates pond. The incremental
rease from 0.047 to OA49 mg/L is approximately 4%. The effect of dilution is a major reason
t the predicted incremental increase in the phosphorus concentration is small. For example,
volume of water which would flow from the Olson Lake Estates pond to Lake Olson during
runoff events of a 10-year magnitude or less is from 2 to 4% of the volume in Lake Olson
available for mixing. When the volume of Lake DeMontreville is added in, the Olson Lake
Estates pond discharge is only 1 to 2% of the total volume available in Lakes Olson and
DeMontreville. The model predicted that the small increase in phosphorus concentration would
be nearly undetectable in terms of Secchi disc transparency and the percent of summer with
algae blooms. The results of water quality sampling conducted by the Washington Soil and
Water Conservation District in 1992 and VBWD in 1993 at the Olson Lake Estates pond appear
to support the model assumptions.
Historical data indicates the existing and future desired uses of Lakes Olson and
DeMontreville have often conflicted with their water quality during the late summer period.
According to MPCA surveys;Secchi disc transparencies less than 2 meters are associated with
water quality conditions which result in impaired swimming conditions. Secchi disc
transparencies were less than ? meters during the late summer period of 1988 through 1991.
Application of an algicide during the late summer period has been necessary to control algal
blooms, and make the lakes more enjoyable for recreational use, especially swimming. During
the years when an algicide was not applied (i.e. 1988-1990), the conflict between water quality
and usage was essentially the same in both lakes. As discussed previously, application of an
91a algicide during 19nd-T�esu-Ite-d in a greater improvementn i transparency-m-Lake
Olson than in Lake DeMontreville. Thus, during years when algicide application has occurred,
the conflict between water quality and usage has been less in Lake Olson than in Lake
DeMontreville. During 1993, no water quality/usage conflict was noted in Lake Olson.
Section 3.2 -- Water Quality Management Plan identifies Lake Olson as a Category I lake,
based on its existing and desired recreational uses. Further description of this water quality
classification is included in Section 3.2.
4.2.8.6 VBWD Water Quality Management Goals
As shown in Table 5 of Section 3.2 -- Water Quality Management Plan, VBWD's
management goal for Lake Olson is restoration of the lake's water quality so that the existing:
and future desired recreational use no longer conflict with the lake's water quality during the
late summer period. The current recreational use of the lake indicates the that the Lake Olson
would be a Category I waterbody, however, the lake's late summer water quality data have
generally suggested it to be a Category II water body, Although VBWD's current goal is
restoration to achieve a Category I rating, VBWD may need to revise this goal based on further
water quality testing results and hydrologic and nutrient budget results under ultimate
watershed land use conditions.
VBWD will complete hydrologic and nutrient budgets of Lake Olson, depending on the
availability of funds. VBWD will then, establish final management goals for the lake. Water
quality goals established for Long Lake and Lake DeMontreville will consider the water quality
23\82\045\SEC4.RPT\KMH 28 DRAFT: June 23, 1994
necessary to achieve Lake Olson's goals, The link between the three lakes necessitates
consideration of the effect of upstream lakes on the water quality of downstream lakes when
establishing their goals.
VBWD will monitor the water quality of Lake Olson and consider monitoring the water
quality of Olson Lake Estates pond. VBWD's current water quality monitoring program calls
for Lake Olson to be sampled every three years. Depending on which outlet option is chosen
for outletting the Olson Lake Estates pond, VBWD will consider whether to sample Olson Lake
Estates pond and Lake Olson annually for the first three years after project completion to
determine if there are noticeable impacts to the water quality of Lake Olson. Depending on the
monitoring results, VBWD may then return to sampling Lake Olson every three years.
VBWD will also consider authorizing a study to analyze the effectiveness of placing
treatments at critical points to maximize the long-range water quality goals of all lakes in the
Tri-Lakes system. Examples of this concept may include treatment of the Long Lake outflow
entering Lake DeMontreville or construction of water quality treatment facilities at various
points upstream of the Tri-Lakes.
4.2.9 Lake Jane Water Management Plan
4.2.9.1 Location and General Description
Lake Jane (DNR #82-104P) is located in subwatershed JAN1, in the northwest corner of
the City of Lake Elmo, southeast of Lakes Olson and DeMontreville. The lake has a surface
I area of about 160 acres and a maximum depth of 35 feet.
The Lake Jane tributary watershed is 921 acres, which includes Hedges Bog and Hedges
Pond. The tributary watershed is 976 acres if Deer Pond and Crombie Pond are included.
( Under flooding conditions, water from Lake Olson (4,352 acres or 3,866 acres, excluding Olson
Lake Estates) will flow to Lake Jane. Therefore, the total Lake Jane tributary area is 5,328 acres
or 4,842 acres, excluding Olson Lake Estates. Most of the Lake Jane watershed is developed.
Some developable land in the watershed is located east of Jane Road North, north of 45th Street
North and just south of T.H. 36.
' 4.2.9.2 Drainage Patterns and Stormwater Issues
A 459-acre portion of the tributary area is located between Lake Jane and T.H. 36
(subwatersheds JAN7 - JAN10, JAN13, and JAN14). Land use in the area includes the Fox Fire
Estates, Springbom's Green Acres, and Lake Jane Estates developments, along with
undeveloped land just south of T.H. 36. After overflowing a series of water bodies and
wetlands, water would flow south, eventually reaching a pond north of Jane Road North, west
of the extension of Jamaca Avenue North. This pond overflows Jane Road North at Elevation
940.2. At the time of the Fox Fire Estates and Springbom's Green Acres developments, a pipe
outlet was proposed from this pond to Lake Jane. However, VBWD did not allow the outlet
to be constructed, so the road overflow is the pond outlet. During design of Project 1007, this
area was found to be tributary to Lake Jane, assuming existing outlet conditions. However, no
discharge from the area has been observed, which indicates that seepage from the ponds has
been enough to dissipate the runoff from the watershed. If overflow from the watershed were
to occur, it could have an impact on the water quality of Lake Jane.
A 1978 plan prepared for the City of Lake Elmo proposed a storm drainage system for
the area. Part of the plan included a lift station to carry water from the pond north of Jane
Road North to the large DNR-protected wetland (#82-100W) located southwest of 55th Avenue
(
23\82\045\SEC4.RPT\KMH 29 DRAFT: June 23, 1994
and Jamaca Avenue North in subwatershed JAN12. From there, water was to discharge
rly through two ponds, eventually reaching Lake DeMontreville. The proposed system
to operate as a low -flow bypass, with higher flows discharging to Lake Jane. Such a
,ped discharge would be beneficial in terms of preserving Lake Jane water quality.
,Never, VBWD will not pursue such an option because of the water quantity and water
ality impacts to Lakes DeMontreville and Olson,
/Eighteen homes were within the flood plain of Lake Jane, Hedges Bog, Hedges Pond,
eer Pond and Crombie Pond prior to construction of VBWD's Project 1007. Because the lake
had no natural outlet, large long-term fluctuations occurred in the lake level. Analyses
indicated that the 100-year flood level without pumping was Elevation 932, The OHW of the
lake was set by the DNR at 924.0. In 1979, the Managers of VBWD installed a small pump and
f pipeline on the south shore of Lake Jane. Water was pumped from Lake Jane to City Park
Pond every year until 1987, with the exception of 1980.
Figure 4-12, prepared by the DNR, shows historic Lake Jane water levels from 1968 to
the present. VBWD began monitoring lake water levels in 1969; the VBWD data is included
in the graph. In August, 1986, Lake Jane reached Elevation 927.4, a record high. The flooding
which occurred as a result of the high water in the early to mid -eighties caused approximately
a million dollars in property value reduction on Lake Jane. A City of Lake Elmo ordinance
requires a no -wake zone on Lake Jane, beginning when water levels reach Elevation 924.0.
The construction of an outlet from Lake Jane in 1987, as part of Project 1007, lowered the
100-year flood elevation from 932.0 to 926.0. Water from Lake Jane flows to Hedges Bog and
Hedges Pond via ditches. The Lake Jane outlet structure controls the water level on Lake Jane,
Hedges Bog and Hedges Pond. The outlet consists of 30-inch diameter pipes into and out of
the control structure and is located approximately 20 feet north of the old outlet pipe. A 6'fi-
foot diameter manhole located in Deer Pond Trail contains the control structure, which consists
of a weir and stoplogs. The top of the stoplogs is at Elevation 922.35. Stop logs can be
than three inches is anticipated. The maximum allowable drawdown is to Elevation
From Hedges Pond, water flows in a 30-inch pipe in Deer Pond Trail, combines with the
Deer Pond outflow near the intersection of Jack Pine Trail and Deer Pond Trail, and discharges
to the northwest shore of Crombie Pond. The Crombie Pond outlet is comprised of 30-inch
diameter pipes into and out of an 8-foot diameter control structure located in Lake Jane Trail
(42nd Street North), west of Irish Court. A weir and stop logs control the outflow from the
pond. The top of the stop logs are at Elevation 921.5. According to a DNR-approved operating
plan, the stop logs can be removed only when snowmelt runoff greater than three inches is
anticipated. The maximum allowable drawdown is to Elevation 919.0.
Under normal conditions, Lake Olson water will flow to Deer Pond, Crombie Pond and
then to Eagle Point Lake. When flow rates exceed about 13 cfs; water will flow from Deer
Pond to Lake Jane, as well as to Crombie Pond. As inflow abates, the stored water on Lake
Jane will again flow to Deer Pond and out of the Tri-Lakes system. Approximately 80 percent
of the long-term hydraulic loading from Lake Olson is predicted to bypass Lake Jane. After
the initial drop in water level resulting from construction of VBWD's Project 1007, Lake Jane's
water level dropped even further because of drought conditions. Lake Jane did not reach its
discharge elevation again until the spring of 1993. When Lake Olson and Lake Jane water
levels were at their peak in July,1993, water was still flowing from Lake Jane to Crombie Pond.
Seven homes in the Lake Jane area were still within the flood plain after construction of
Project 1007. Five of the homes were on Lake Jane, one was on Deer Pond and the other was
23\82\045\SEC4.RPT\KMH 30 DRAFT: June 23, 1994
on Crombie Pond. All of the homeowners were invited to participate in VBWD's residual
floodproofing program, but only two homeowners on Lake Jane took part in the program. One
resident constructed a berm and installed a sump pump, while the other resident had the house
raised. Therefore, five homes are still within the 100-year flood plain of Lake Jane, Deer Pond
and Crombie Pond. The 100-year flood elevation of Deer Pond is 926.7, and the 100-year flood
elevation of Crombie Pond is 924.9.
4.2.9.3 VBWD Water Ouantity Management -Goals
VBWD will periodically monitor the pond water levels in the Fox Fire
Estates/Springborn's Green Acres area. If water levels appear to be on a long-term upward
trend and discharge to Lake Jane appears possible, VBWD will determine if water quality
treatment measures should be taken.
VBWD will continue to monitor Lake Jane water levels and provide the information to
the DNR.
4.2.9.4 Water Oualitv and DNR Data
The DNR currently manages Lake Jane for largemouth bass, bluegill, and crappie. The
lakes native fish population reproduced well in the past, and continues to reproduce well. For
this reason, stocking has not occurred since 1977, and no stocking is planned for the future.
The lake was stocked with northern pike during 1976 and 1977.
In 1986, the DNR began a 12-16 inch slot size limit on largemouth bass to control bluegill
abundance in Lake Jane. The DNR held public meetings during the fall of 1993 to determine
whether the slot size limit should be continued. The DNR dropped the slot size limits for Lake
Jane. Instead, the DNR plans to initiate a catch and release regulation for Lake Jane in 1996 in
an effort to increase the bass population and improve the bluegill population.
Before construction of VBWD's Project 1007, the majority of the nutrient loading to Lake
Jane appeared to be from infrequent Lake Olson overflows and inundation of septic systems.
Overflow from Lake Olson may have occurred in the early decades of this century, according
to local reports. Recorded overflows from Lake Olson began in 1975 and occurred almost every
year through 1987.
Water quality data have been collected from Lake Jane on a regular basis since 1971.
VBWD collected water quality data during 1971, 1972, 1979, and 1990, The Metropolitan
Council collected data in 1984, 1986, 1987, and 1991. The Tri-Lakes Association collected
samples during 1975, 1977, 1978 and 1985. A citizen volunteer has collected Secchi disc
transparency data from the lake each summer since 1973 as a part of the Citizen Lake
Monitoring Program. The average summer total phosphorus, chlorophyll a, and Secchi disc
transparency data are summarized in Figure 4-13. Thermal stratification of the lake has been
observed at depths of about 20 feet.
The water quality of Lake Jane has historically been characterized by high transparency
and relatively low concentrations of algae. The lake's long term average growing season
phosphorus concentration of 0.028 mg/L is lower than most of the other lakes in this region
(MPCA, 1990).
Despite its relatively good water quality, however, the lake's algal population increases
from the early summer period to the late summer period. As shown in Figure 4-4, Secchi disc
transparency ranges from four to six meters during the early summer period. The high water
23\82\045\SEC4.RPT\KMH 31 DRAFT: June 23, 1994
clarity indicates few algae are present in the water, and the lake is desirable for all types of
recreational activities. However, algal growth throughout the summer causes the transparency
to decline to one or two meters by late August each summer.
The MPCA conducted surveys of citizen volunteers and MPCA staff members to
determine the level of algal growth the public perceives as interfering with the enjoyment of
swimming in a lake, The survey results indicate most people would associate transparencies
of less than 1.5 meters as either "swimming impaired" or 'no swimming". Applying the
MPCA survey results to the Lake Jane water quality data suggest that the algal blooms in Lake
Jane during the late summer interfere with public enjoyment of the lake for swimming. The
MPCA survey results indicate that Lake Jane's current water quality places it in a category of
being undesirable for swimming activities during the late summer period. Based on the results
of its surveys, the MPCA recommends that the Secchi disc transparency of a lake remain
greater than two meters a majority of the time to avoid the perception of impaired swimming.
As shown on Figures 4-14, Lake Jane's growing season Secchi transparency values have
remained less than two meters during much of the late summer period, even during years
when it was treated with an algicide. The MPCA has found that water transparency less than
one meter and frequent algal blooms make a lake undesirable for boating and for any
swimmable use (MPCA, 1990). During 1987 and 1988, the Secchi transparency values were less
than one meter for a short period of time during August.
The data indicate that late summer algal blooms occur in the lake annually, but the
severity of the blooms vary from year to year. During 1987, 1988, and 1991, algal blooms
during the late summer period were more severe than algal blooms noted during 1989, 1990,
and 1992. The lake was treated with an algicide during 1989 and 1990, and the treatment may
have reduced the severity of algal blooms. Although the lake was not treated with an algicide
during 1992, reduced late summer algal blooms were noted.
Algicide treatment of Lake Jane has not occurred since 1990. Historically, treatment '
occurred in 1976,1984, 1989-, amJ 1990-.-Discussions with lake residennus 1 dic`ate they agree that --
algal blooms during the late summer are undesirable and interfere with their enjoyment of
swimming in the lake. However, not all of the residents agree about the need for algicide
treatment of the lake. Some feel strongly that the lake should be treated. Others believe
treatment is unnecessary. Therefore, no treatment has occurred since 1990.
Historical total phosphorus, chlorophyll a, and Secchi disc transparency averages (see °
Figure 4-13) indicate the water quality of Lake Jane has varied somewhat from year to year.
Results of a trend analysis of Lake Jane water quality data showed a significant decrease in }
chlorophyll a, but no significant changes in total phosphorus, or transparency (Secchi disc) over
the 1971 1990 period. A significant change in all three indicators is needed to indicate a
significant change in water quality.
j
The Lake Jane water quality data indicate relatively good water quality in the lake during
the entire period of record. The data indicate the lake's average growing season phosphorus
concentration has consistently been within the moderate category. The long term average
growing season total phosphorus concentration from the lake's epilimmon (0.028 mg/L) is very
similar to the most recent summer average (0.025 mg/L in 1991). The data were compared to
criteria used to denote a lake's nutrient "status" (NALMS, 1988). Based on this comparison,
Lake Jane would be assigned a trophic status of mesotrophic. This simply means that the lake
has a moderate amount of nutrients. As shown in Figure 4-13, the growing season average
total phosphorus concentration has generally been within the mesotrophic category throughout
the period of record (1971-1991).
23\82\045\SEC4.RPT\KMH 32 DRAFT: June 23, 1994
Historical chlorophyll data suggest the take's algal blooms are somewhat greater than
would be expected for the lake's phosphorus concentration. The long term growing season
chlorophyll a concentration from the lake's epilimnion (11.5 mg/m') is approximately half of
the most recent summer average (19.6 mg/m3 in 1991). The data indicate the lake is
responding to its nutrient load by experiencing more algal blooms than expected. As shown
in Figure 4-13, growing season mean chlorophyll concentrations were generally within the
mesotrophic category during the period of record (1971-1991). Exceptions occurred during
1984, 1987, and 1991 when the mean was within the eutrophic category. This simply means
that the average level of algal blooms noted in the lake have generally been moderate, but have
been at an undesirable level in recent years. However, algicide treatment in 1990 reduced the
algal blooms to a moderate level.
Even though the historical data suggest the lake's water transparency has been good, the
lake experiences water quality problems during the late summer period, as noted earlier.
During the period 1971 through 1992, the average growing season water transparency remained
within the mesotrophic category. These data suggest the lake had relatively good water
transparency throughout the period of record. However, the average fails to depict the annual
decline in water transparency, which results in a public perception of undesirable water
transparency by late summer. As mentioned previously, treatment by an algicide during 1989
and 1990 may have improved the late summer water clarity somewhat.
Problems with aquatic vegetation in recent years necessitated chemical treatment in
private beach areas around the lake. The lake was chemically treated to control weeds during
1989 through 1993. Specifically, an area that included 2,985 feet of shore and extending
approximately 150 feet from shore was chemically treated. This is 10% of the littoral area,
which is the maximum allowed by the DNR. Treatment was completed by a professional, and
coordinated by the Lake Jane Association.
4.2.9.5 Public Use and Related Water Quality Concerns
Lake Jane is very heavily used for a wide variety of recreational uses. Uses during the
ice -free period include swimming, fishing, boating (speedboats, canoes, pontoons, and fishing
boats), waterskiing, and passive uses by.lake residents. During the winter months the lake is
used for ice fishing, ice skating, and snowmobiling.
A public boat access wasconstructedalong the south shore of Lake Jane in the fall of
1980. The number of individuals accessing the lake is limited, however, by the 10 parking
spaces in the public access. A DNR recreational survey completed in 1980 indicated fishing
pressure in the lake was 38.71 angler -hours per acre, which is near the Metro Region median.
Boat anglers comprised approximately two-thirds of all anglers. It is likely that the recreational
survey was completed prior to the completion of the boat access.
The Tri-Lakes Association is a local organization which is interested in preserving and
improving water quality. It consists of residents .of Lake Jane, Lake Olson, and Lake
DeMontreville.
Although Lake Jane does not have a public swimming beach, the lake is heavily used for
swimming. Residents have private swimming beaches, which receive heavy usage during the
summer months. Swimming lessons are offered at the lake each summer, and from 30 to 60
individuals generally participate.
A large amount of open space is located along the shoreline, and is expected to remain
undeveloped because of wetlands, etc. A large number of wildlife and waterfowl have made
23\82\045\SEC4.RPT\KMH 33 DRAFT: June 23, 1994
it home in this open space area. As a result, deer, ducks, and loons are frequently sighted
lake residents and lake users.
The City of Lake Elmo plans to establish walking/biking trails along roads around Lake
The paths will increase the usage of the lake by the public. '
9.6 VBWD Water Quality ManaUment Goals
Section 3.2 -- Water Quality Management Plan identifies Lake Jane as a Category I lake,
on its existing water quality and existing and desired recreational uses. Further
ption of this water quality classification is included in Section 3.2.
Also as shown in Section 3.2, Lake Jane is to be managed in order to protect and possibly
re its water quality. Because of the late summer algae blooms interfering with swimming,
Jane is considered as "borderline" in terms of water quality/usage conflicts. The addition
)re tributary area would likely exacerbate the situation..
If the Lake Jane tributary watershed does not increase, little change in .phosphorus
ig is expected in the future. For this reason, the lake's water quality is expected to remain
present level. Therefore; management of the lake will focus on the use of Best
gement Practices within its existing watershed. However, because of its relatively small
age area, it appears that the phosphorus loading from on -site septic systems may be a
source of phosphorus for the lake. This is especially true in years where no overflow
Lake Olson into Lake Jane occurs. Elimination of this source of phosphorus to the lake
therefore result in water quality improvement. VBWD will complete hydrologic and
!nt budgets for Lake Jane, depending on the availability of funds. These budgets will
9er both existing and ultimate watershed land use conditions and include the impact of
systems on phosphorus loads. After Completion of the budgets, VBWD will set water
y goals for Lake Jane, and examine feasible means of achieving these goals.
In the future; water quality data will be collected from Lake Jane every three years,
ding on the availability of funds. Because the Metropolitan Council collected data in
e next scheduled water quality collection by VBWD will be during 1994. VBWD will
er collecting phytoplankton and zooplankton data as a part of future sampling programs
uate the level of natural control of the algal population by zooplankton grazing in Lake
However, Secchi disc data will continue to be collected on an annual basis by a lake
However,
as a part of the MPCA Citizen Lake Monitoring Program.
Eagle Point Creek Water Management Plan
Location and General Description
t
gle Point Creek is an intermittent stream comprised of two major branches. The north
ins in the City of Oakdale, west of I-694 and south of T.H. 5. From there, water flows
enters the City of Lake Elmo and crosses Stillwater Boulevard near its intersection with
et North. Water from VBWD's Project 1007 Tri-Lakes outlet crosses T.H. 5 just west
:a Avenue North, crosses the railroad tracks and enters Beutel's Pond. Water from
Pond crosses Stillwater Boulevard (CSAH 6) and enters the north fork of Eagle Point
est of Ivy Avenue North. Then water flows southerly to Lake Elmo Park Reserve and
hemmost bay of Eagle Point Lake. The north fork is DNR-protected from I-694
17) to Eagle Point Lake, a distance of 2.75 miles.
t5\SEC4.RPT\KMH 34 DRAFT: June 23, 1994
The south fork begins west of Inwood Avenue, in the City of Lake Elmo. Water in the
south fork flows easterly to Lake Elmo Park Reserve and then to the northwest bay of Eagle
Point Lake. The south fork is not a DNR-protected watercourse.
The Eagle Point Creek tributary watershed is 3,241 acres, of which 2,422 acres is tributary
to the north fork and 819 acres is tributary to the south fork. The upstream portion of the
north fork tributary area is comprised of subwatersheds: EPC2 - EPC18, EPC20, EPC22 -EPC36,
EPC53, EPC62, EPC72, EPC76, EPC80, EPC88, OL13, OL14, EPN1 - EPN3, and EPN5 - EPN8.
In addition, the north fork receives the outflows from Lake Jane, Lake Olson and Olson Lake
Estates (5,328 acres). Therefore, the total tributary area to the north fork of Eagle Point Creek
is 7,750 acres. The south fork tributary area is comprised of subwatersheds EPL1 - EPL5 and
EPS1 - EPS4. Figure 3 shows the tributary area. Almost all of the tributary area within the
City of Oakdale is developed, with the exception of undeveloped land located east of I-694,
between Stillwater Boulevard and 40th Street North. Large portions of the tributary area in the
City of Lake Elmo are undeveloped, including the downstream portions of the creek which are
located within the Lake Elmo Park Reserve.
4.2.10.2 Draina¢e Patterns and Stormwater Issues
The City of Oakdale's Surface Water Management Plan shows the discharge points and
associated flowrates at the City of Oakdale's boundary. In the Eagle Point Creek subwatershed,
these discharge points are located in subwatersheds OL14 (proposed discharge - currently flows
to a landlocked subwatershed), EPC21 (flows to a landlocked subwatershed), EPC22, EPC35,
EPC36, EP13, EPL4, and EPL5.
After the creek leaves the City of Oakdale, there is minimal on -stream storage available
for rate control. As a result, streambank erosion is currently problem and could become more
severe. The north fork of Eagle Point Creek does not have sufficient capacity and frequently
overtops its banks, flooding and eroding adjoining property. In July of 1992, a Lake Elmo
resident reported that the creek floods her property every spring, taking six inches of her yard
with it. The north fork also floods Tablyn Park and properties adjacent to the driveway
crossing at 28th Street North and Jamley Avenue North, both located in Lake Elmo. Debris in
the creek channel has contributed to flooding problems in the area of the creek crossing.
Remains of an abutment just downstream of the creek crossing may also restrict flows, possibly
contributing to flooding problems in the area. The DNR suggests that an unmanaged buffer
strip of woody vegetation be established along the creek to prevent erosion of the streambanks.
As part of VBWD's Project 1007, the 48-inch diameter culvert at the 28th Street North and
Jan -ley Avenue North creek crossing was replaced with a 73-inch span arch culvert. Flowrates
in the creek channel downstream of Beutel Pond are also affected by the flows from the Tri-
Lakes Outlet and Beutel Pond. The peak 100-year flowrate in the north fork of Eagle Point
Creek, downstream of Beutel Pond is approximately 900 cfs. VBWD's Project 1007 increased
the flowrates in the north fork of Eagle Point Creek by approximately 60 cfs (7%). Of the 60
cfs, 15 cfs is the contribution from the .Tri-Lakes outlet and 45 cfs is the contribution from the
Jamaca Court and Beutel Pond area. The Beutel Pond outlet was increased from a 12-inch
diameter pipe to a 48-inch diameter pipe to reduce flooding problems in the Jamaca Court area
and in response to increased inflow from the Tri-Lakes outlet.
Another area of concern is a 200-acre area (subwatersheds OL13 and OL14) located
between T.H. 5 and 40th Street North, west of Ideal Avenue North, in the City of Oakdale. The
existing drainage patterns in the area are not well-defined. The design of VBWD's Project 1007
did not include this area as tributary to the project, however it was shown as tributary to
Beutel's Pond in the previous VBWD water management plan. The current overflow from the
23\82\045\SEC4.RPT\KMH 35 DRAFT: June 23, 1994
area is either west and north to subwatershed OL17 eventually reaching Olson Lake, or east
to subwatershed JAN16 in the City of Lake Elmo, a landlocked subwatershed. The City of
Oakdale submitted information prior to VBWD approval of the Oakdale Surface Water
Management Plan which showed existing flowrates from the OL13/OL14 subwatershed ranging
from 9 to 17 cfs.
VBWD conducted a survey in September, 1992, to determine the ultimate overflow point
from the OL13/OL14 watershed. A 15-inch diameter culvert crosses Ideal Avenue North, just
south of39th Street North. The east end of the culvert was plugged at the" time of the survey.
Assuming the culvert is unplugged, overflows from subwatersheds OL13 and OL14 would
most likely be directed to subwatershed JAN16. Assuming the culvert remains plugged, the
overflow would be directed to the west and north, to subwatershed OL17 and Olson Lake.
Since neither Olson Lake nor Deer Pond was designed to handle this additional volume of
water, the outflow from this watershed needs to be directed elsewhere, most likely to Eagle
Point Creek via subwatershed EPN8. Although the City of Oakdale's Surface Water
Management Plan calls for over 60 acre-feet of storage to be provided in this area, the proposed
peak discharge from OL14 is 66 cfs. To move the water from this area to Eagle Point Creek
will require either an extensive ditch system or a pumped outlet because subwatershed JAN16
is landlocked. Therefore, a diversion is needed to carry the water to subwatershed EPN8 and
the drainageway east of Ideal Avenue North which carries water to the upstream side of the
T.H. 5 culvert. The Oakdale Surface Water Management Plan presents two options for the
OL13/OL14 drainage area:
Provide all of the necessary storage on -site, within the City of Oakdale.
2. Provide the majority of the necessary storage on the property east of Ideal, in the
City of Lake Elmo, and provide the remainder of the needed storage on -site. Since
the City of Oakdale would be routing storm water through the City of Lake Elmo,
an improvement project may be required prior to development of the site.
In either case, discharge to Eagle Point Creek will either be limited by the existing
capacity of the in -place downstream system or the downstream system will require upgrading
to handle any increased discharge. Based on the already -limited downstream capacity of the
creek, the allowable discharge from the OL13 and OL14 area will likely be less than that called
for in the Oakdale Surface Water Management Plan.
The Oakdale Surface Water Management Plan states the following:
The details of the-offsite system are difficult to determine until development proposals
for OL-13/OL-14 are brought before the City. At that time, a study to determine
detention needs, conveyance system design, and land acquisition will be prepared. Any
development occurring prior to the completion of this study will be required to provide
detention onsite (within OL-13/OL-14).
VBWD will study the impact of the proposed development(s) on the downstream storm water
system at that time. Any proposed improvements will require VBWD approval.
4.2.10.3 VBWD Water Quantity Management Goals
VBWD proposes to improve the creek channel capacity along the north fork an
provide at least one detention basin along the creek to reduce downstream erosion,
sedimentation and flooding. The detention basins would provide the added benefits of flow
23\82\045\SEC4.RPT\KMH 36 DRAFT: June 23, 1994
Mayors Report August 2, 1994
On July 25, I watched the signing of the St. Croix River Touring Alliance
Articles of Incorporation by Governor Tommy Thompson of Wisconsin and
Governor Arnie Carlson. This took place aboard the Andiamo River Boat
somehere upstream of the Stillwater lift bridge. The alliance is an attempt to
coordinate the tourism publicity activities of eleven Minnesotan and eight
Wisconsin communities from Taylors Falls to River Falls. In this way, funding
will be spent more efficiently, and the attractiveness of the St. Croix Valley
will be publicized over a worldwide range of potential tourists. Tourism
already generates about $35 million in annual revenues for the area.
Forming the alliance is expected to ensure that this revenue will increase.
On the evening ofWednesday July 27, the City Administrator and I attended
a meeting with the Lake Elmo Volunteer Firemen, and discussed a number of
issues, from equipment disposal to budgets and coverage agreements
between Lake Elmo and adjacent communities. At this stage I would like to
recognise the resignation of Bill Eder from the Department after more than
30 years voluntary service. Thirty years of service as an employee is a long
time, but it is even more worthy of note as a volunteer. The City owes him a
lot, and I wish to specifically recognise his efforts in voluntarily providing
Fire Protection and Rescue Services to the citizens of Lake Elmo. Thank you,
Bill.
Another subject related to the Flush Water Hydrants which are located at
various points in the City. These are NOT Fire Hydrants, although they may
look the same. They are only used to flush out the domestic water systems at
times of maintenance. They do not have the water supply capacity for fire
fighting use, and should not be indicated as such in Home Insurance
application forms. The City Administrator is issuing a notice to this effect,
this will give it additional publicity.
Finally, tomorrow night, August .3, at 7.00 p.m. in the cafetaria of the Fortis
Insurance Building, I shall attend a planning discussion on the I-94 corridor.
This is at the invitation of Senators Gary Laidig and Len Price,
Representatives Pam Neary and Walt Perlt. Other municipalities have also
been invited, so as to develop a coordinated vision of the corridor. I shall
report on this meeting at the August J�
/I
LAKE ELPIO CITY COUNCIL BUDGET UORKSHOP # 1 - AUGUST 2, 1994
SUPZ^IARY MINUTES
Mayor John called budget workshop to order at 6:10 n.m. in the City
Council Chambers, PRESENT: John, Johnston, Johnson, Conlin
Banister handed out preliminary proposed budget with some 1995
figures.and asked for input from Council for their priorities
for expense additions.
FULL TIME PLANNER: discussion on whether it's time for the City to
have an in-house planner. Council agreed to nut $50,000 for salary
and benefits in 1995 budget for full time planner.
POLICE CONTRACT - add 1 more deputy to contract: discussion on
having 3 deputies for 1995 at a cost of about $52,000 more. Council
decided to continue with only 2 deputies for 1995.
CITY CENTER PLANNING: Mayor John inquired what to do about putting
money in budget for expenses for City Center planning. Council
agreed to add a line item "City Center/I-94 Planning Reserve" in
the amount of $30,000 to the 1995 Budget.
CIVIL DEFENSE SIREN: Fran Pott was present to update Council on
siren for Tri-Lakes. Price for a new siren of $14,400 also there
are used sirens available at about 25% of cost of new one. We
put $5,000 in 1993 budget and $7,000 in 1994 budget for siren.
Council agreed. to add $7,000 in 1995 Budget for Civil Defense
Capital Outlay. Council directed Fran Pott to proceed with more
detail to purchase a siren for Tri-Lakes area.
FIRE, PUBLIC WORKS & PARKS BUDGETS: Fire department wants to meet
with the Council as a whole to discuss their needs, Banister to
set up meeting time and date. Banister to meet with Dan Olinger &
Mike Bouthilet to prepare Public Works and Parks Budgets. Council
would like department heads (Dan & Mike) to attend a budget workshop
to answer any questions that may come up. Banister to prepare
budgets for the next workshop - August 9th at 3:00 P.M.
BUDGET WORKSHOP ADJOURNED AT 7:00 p.m.
Since we do not have time to discuss every point presented, it may seem that decisions
are preconceived. However, background information is provided for the City Council on each
agenda item in advance from City Staff and appointed Commissions; and decisions are based
on this information and past experiences. In addition, some items may also have been
discussed at previous Council meetings.
If you are aware of information that hasn't been discussed, please fill out a "Request to
Appear Before the City Council" slip; or, if you came late, raise your hand to be recognized.
Comments that are pertinent are appreciated. Items requiring excessive time may be
continued to another meeting.
LAKE ELMO CITY COUNCIL MEETING
AUGUST 2, 1994
****6:00 P.M. BUDGET WORKSHOP****
7:00 p.m. MEETING CONVENES
Pledge of Allegiance
1. AGENDA
2. MINUTES: July 19, 1994
3. CLAIMS
4. PUBLIC INFO RMATIONAUINQUIRIES:
A. Public Inquiries
B. Jaycee Proclamation (Huff'n Puff)
C. Jaycee Non -Intoxicating Liquor License
D. Invitation from MAC to tour city facilities
E. Other
5. PLANNING/LAND USE & ZONING:
A. Martin Colon-resubmittal of application
6. UNFINISHED BUSINESS:
A. Olson Lake Estates Pond (Continuation)
Valley Branch Plan Amendment
B. Highway 36 Meeting - Update
C. Other
(over)
LAKE ELMO CITY COUNCIL AGENDA AUGUST 2, 1994 2
7. CITY ENGINEER'S REPORT:
A. Street Light Request: 39th St. & Laverne, 39th St. & Lake Elmo Avenue
B. Update on local surface water management plan
C. County Road 10 Mitigation
D. County Road 10 Reconstruction Update (Washington County)
8. CITY ATTORNEY'$ REPORT:
A. Impounding Agreement with St. Croix Animal Shelter
9. CITY COUNCIL REPORTS:
A. Mayor John
B. Council Member Conlin
C. " Johnson
D. " Johnston
E. " Mottaz
10. CITY ADMINISTRATOR'S REPORT:
A. Proposed Ordinances relating to Curfew, Noise, Loitering
B. Other
11. Adjourn