HomeMy WebLinkAbout2005-05-05 Supplemental McKean Square Developer's AgreementSUPPLEMENTAL AGREEMENT TO THE
MCKEAN SQUARE DEVELOPERS AGREEMENT
CITY OF OAK PARK HEIGHTS
WASHINGTON COUNTY, MINNESOTA
WHEREAS, the City of Oak Park Heights and VSSA Housing and
Community Services, LLC entered into a Developers Agreement affecting the
construction and development of McKean Square within the City of Oak Park Heights in
September of 2003; and,
WHEREAS, the Developers have constructed a well for aesthetic and
vegetative watering purposes in the development; and,
VVIIEREAS, the well as sited and located (See Exhibit "A ") provides a
potential source of conflict with a future municipal well to be located by the City of Oak
Park Heights; and,
WHEREAS, the siting of the future municipal well may be impacted by
the location of the well as constructed on the site by the Developer; and,
AREAS, consent to the well as located by the Developer has been
requested of the City of Oak Park Heights by the Department of Natural Resources; and,
WHEREAS, the City is willing to consent to the location of such a well
and its operation upon certain terms and conditions; and
WHEREAS, The siting of wells will be influenced by the special well
construction area established under the Minnesota Department of Health and the
Minnesota Pollution Control Agency now located in parts of Baytown and West
Lakeland Townships and the City of Bayport as outlined in attached Exhibit "B".
NOW THEREFORE, be it agreed hereto between the parties as follows:
The City of Oak Park Heights will withdraw all objections to the well
constructed upon the premises of McKean Square by the Developer as the same has been
presented to the Minnesota Department of Natural Resources and the Minnesota
Pollution Control Agency and the Department of Health, in exchange for which the
Developer agrees as follows
1. That in the process of siting a future municipal well by the City of
Oak Park Heights, should the existence of the Developer's well on the McKean Square
site materially impair, impede or create greater expense for the City of Oak Park Heights
in the process of locating its needed third municipal well with no other reasonable
alternate site existing in the area for location of the city's well as reasonably determined
by the City then, the Developer shall within 120 days of written notice of such
determination by the City implement alternate engineering or optional alternatives to
mitigate the additional expenses subject to the review and approval of the City's
Engineer, if no such alternatives exist or they are not implemented, then, the Developer
shall cap and close off its well on McKean Square or otherwise pay to the City of Oak
Park Heights the difference incurred by the City in re- siting the well to another location
so that it is not impacted by the irrigation well constructed upon the site of McKean
Square by the Developer. Should the location and/or operation of a Municipal well impair
or impede the well used for irrigation by Developer there shall be no claim or liability
against the City asserted or commenced by Developer against the City for any claimed
loss of use or damage.
Additionally, should the current Baytown -TCE plume as monitored by the
MPCA and Minnesota Department of Health migrate further north of its current location
Developer shall cooperate with the Minnesota Department of Health, MPCA and City if
requested to suspend pumping activities as part of their efforts to influence the movement
of the plume.
2. The Developers of McKean Square and the current operators of the
irrigation system and the well constructed by the Developer shall lower the drop height to
their well to gain additional available head in the manner recommended by Mr. Dennis
Postier of Bonestroo, Rosene, Anderlik and Associates, the City Consulting Engineers.
(See Exhibit C) Copies of the well drilling logs shall be provided by Developers to the
City.
3. The Developers of McKean Square do acknowledge that they have
been given a copy of the letter received by the City from the Minnesota Department of
Health, Mr, Steven W. Robertson, Hydro - geologist, that indicates, "The location you (the
City) are proposing are sufficiently close to the plume, and the rates you will need to
pump are sufficiently high that careful consideration should be made by you (the City) to
ensure that groundwater contamination would not mitigate northward and affect the
well(s)."; as well a letter from the Minnesota Pollution Control Agency dated April 13
2000 stating similar concerns. Both letters are enclosed in Exhibit "D ". The Developers
acknowledge that their proposed well will be closer to the wellhead protection area and
contamination plume than the City's once contemplated wells and could potentially lead
and/or contribute to contamination of the City's aquifer.
4. Developer shall establish watering zones for the irrigation system
to be located and used upon its property and substantively comply with City watering
bans andior city wide restrictions including odd/even or total watering bans by altering
the irrigation practices within the established zones. Copies of irrigation zone maps shall
be provided to the City.
IN WITNESS WHEREOF, the parties have hereunto set forth their
hands and seals this 5 day of ni d
CITY OF OAK P
Eric J son
Ci A dministrator
VSSA HOUSING AND COMMUNITY SERVICES, LLC
Its
Its
Drafted by:
Mark J. Vierling
ECKBERG, LAMMERS, BRIGGS,WOLFF & VIERLING, P.L.L.P.
1835 Northwestern Avenue
Stillwater, Minnesota 55082
, 2005.
EXHIBIT "A"
VSSA PROPOSED WELL SITE
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OAK PARK HEIGHTS, MN
SENIOR HOUSING PARTNERS
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2845 NORTH HAM1.UNE AVENUE
ROSEVITLE, MN 55'1-13
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Folz, Freeman, Erickson, Inc.
September 24, 2004
Molly Shodeen
MN DNR Metro Waters
1200 Warner Road
St. Paul, MN 55106
RE: Permit Application for Appropriation of Waters of the State
Dear Molly,
Bruce A. FoL', .LS
LAND PLANNING • SURVEYING • ENGINEERING
1
Enclosed is the permit application for irrigation purposes for the Presbyterian Homes Facility
located in the City of Oak Park Heights at the Boutwell and McKean Senior Housing Campus.
The Boutwell and McKean Square Campus is currently irrigated with city water. To reduce the
overall cost of irrigation with treated water from the city and to reduce the amount of water drawn
from the ground water resource we have proposed a well and an irrigation pump, which will
operate utilizing an existing pond as a reservoir to allow for a reduction in the rate of pumping
from the well.
The pond level will be maintained with the use of a float system, which will allow for a drop in the
water level. The lag time for the well pump to fill the pond will allow for some potential use of
rainfall that will be collected in the pond, again reducing the need for pumping from the well. The
well will shut off at the existing normal water level in the pond, which is controlled and will
continue to be controlled by the storm outlet structure.
The pump outlet from the well has been designed with an outlet which exits into a rubber lined
rock bed to control erosion. The well water then travels over a constructed waterfall into the
pond/reservoir where the irrigation pump is situated. I have attached a sketch of the delivery
system for clarification.
The total area to be irrigated is approximately 32 acres as identified on the enclosed map. The
period of irrigation as presently determined would be from May through October depending upon
conditions. The amount of water delivered to the area would be approximately one -inch per week.
Subtracting the average rain days for any given year the total estimated water usage for irrigation
is estimated from 12.7 to 18.5 million gallons per year (See the enclosed calculation summary).
This complex and costly system that has been designed will reduce the overall cost of irrigation for
the owners and ultimately conserve the amount of water being pumped from the aquifer.
5620 Memorial Avenue North, Stillwater, MN 55082 + Phone: (651) 439 -8833 s Fax: (651) 430 -9331 s Website: vvww.ffe- inc.corn
Timothy J. Freeman, LS Todd A. Erickson, PE
1939 - 2001 President Vice President
We contacted the Washington Conservation Office and requested the help with a conservation plan
for irrigation and received a statement of opinion rather than any type of technical assistance with
a conservation plan for the site. I have attached their letter dated September 24, 2004 for your
information.
Please contact me if you have any questions or require any additional information in processing
this permit application.
Sincerely,
Folz, Freeman, Erickson, Inc.
Todd A. Erickson, PE
Bruce A. Fob IS
1939 - 2001
2
5620 Memorial Avenue North, Stillwater, MN 55082 • Phone: (651) 439 -8833 + Fax: (651) 430 -9331 4 ebsite: www.ffe- inc.cam
Timothy J Freeman, 15'
President
Todd A. Erickson, PE
Vice President
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OFFICE USE
ONLY
P.A. No.5-- C7)
Date(s) Served
D SWCD
CD WSD
Ei CITY
A-02621-06
(Rev.1/03)
Minnesota
DNR Waters
NOTICE OF WARNING: All information provided on this form is considered to be public informaW,_
in accordance with the Minnesota Data Privacies Act (M.S. 15.1611 to 15.1698).
> SEE INSTRUCTIONS_TYPE OR PRINT CLEARLY
1. Applicant Name (landowner or renter) 2. Business Name
VS56
3. Authorized Agent (if applicable)
T op a
5. Mailing Address
I3 5 Ai
7. Source of Water (-X. one and complete
a. One well
b.0 manifolded wells
(LE: Stream, ditch, or river (name)
dgWetland, lake, or impoundment (name)
e.E) Other
10. Method of Measurement
a Flow Meter
b.L1 Timing Device
c.E) Electric Power Consumption
d.0 Other
13. Irrigation of: ("X" those that apply)
a. D Upland Crops: 0 Corn 0 Potatoes
0 Alfalfa 0 Soybeans
0 Other
b. O Golf Course: 09 Hole 018 Hole 00ther
c. 0 Wild Rice
d.X Star/ 64- I - ; , Ari C
16. Total Acres Irrigated
(No. of Acres)
52_
17. Total Annual Use
(lnches/AcreNear)
18. SOIL AND WATER CONSERVATION PLAN
D YES 0 NO
Permit Application for Appropriation
of Waters of the State
IRRIGATION
> Additional information MUST be 8. Point of Taking/Pumping Site
supplied for each source.
Refer to instructions (7 & 8) for 1/4 of Si 1/4 of 1/4
requirements.
iediJO
11. Legal Description-Land Owned/Rented "
Township No. Range No. Section
* Rental Agreement MUST Be Submitted
19. Additional Requirements:
a. g.:Map or Air Photo which shows: 1) Point of Taking or Pumping Site 2) Test Hole Location
3) Boundaries of Property Owned/Rented 4) Property To Be Irrigated
t75.00 Minimum FILING FEE payable to: DEPARTMENT OF NATURAL RESOURCES"
tatement of Justification/Alternative Sources
d. D Additional Documents Required
I hereby make application pursuant to Minnesota Statutes Chapter 103G.261 and all supporting rules for a permit to appropriate water in
accordance with all supporting maps, plans, and other information submitted with this application. The information submitted and statements
made concerning this application are true and correct to the best of my knowledge.
20. Si
This information is available in an alternative format upon request.
4. Phone Numbers (with area codes)
5 (- L3 1 -
6. City, State, Zip Code
ch 5 - 5
14. Irrigation System To Be Used
a.D Center Pivot
b.E1 Traveling Gun
c. EJ Linear System
cLJJj Fixed Sprinkler
e.D Other 4:41/
b. Section No. 5
c. Township No. 147 ,L)
d. Range No. •
e. County
re of Land. nor Authorized Agent
/./
/44erfr
Fractional Section/Gov't Lot
1-1:14_,7 4(44,
577 uvfl 5 : 5 0
&t
L• IMPORTANT: Submit this application and all supporting data to the DNR Office serving you (see back for addresses).
APPLICANT: KEEP A COPY FOR YOUR RECORDS
9. Means of Taking and Rate
a.XStationary Pump(s) at2.5: gpm
b. 0 Portable Pump at
c. 0 Gravity Flow at
d. CI Other
gpm
gpm/cfs
gpm/cfs
(circle one)
12. Schedule of Irrigation
0 JAN
0 FEB
D M AR
DAPR
15. Major Soils and Percentage of Each:
, S011. TYPE PERCENTAGE
1-4/11/1 9)
5;717./0:7' 2,0
21. Date
//i
KMAY 1 SEP
N3JUN ,N0CT
JJUL DNOV
NAUG EJDEC
Oct 04 04 10 :47
4
FFE, Inc.
Contact: Ed Reid
Phone No,: 651-889-7912
WELL. DRILLING AND PUMP REPAIRING
20335 FOREST BOULEVARD NORTH (HIGHWAY 61)
FOREST LAKE, MINNESOTA 55025
Office Phone (651) 464 -3939 ° (715) 386 -3992 • (715) 483 -3939
. Fax (651) 464 -8849
Contractor: . Presbyterian Homes
5540 Nolan Avenue North
Oak Park Heights, MN 55082
2nd Contact: Brett LMS
Pnone No.: 651-755-2852
Well Drilled on August 4th, 2004
Well Unique No.: 712467
Depth of Well: 306 feet
Job Location: Norwich Parkway & Nolan Ave.
Legal Description:
Washington County, Baytown Township
Section No. 5, Township No. 29N, Range No. 20W
SE V4, SW 1, SE 1 /4
Pump Information:
Berkely Model No, 7T20 -3 50
B77542
20 HP 200 Volt
3 •- Phase
6" Franklin Motor
651 -4Z3O - S 1
Poe
pct 04 04 10:47a FFE, Inc.
5 ,
Township Name
Baytown
Township No. ' Range No.
29N 20W
WELL LOCATION
County Name
ashington
•
IC 140 -0020
ELL OWNER'S NAME/COMPANY NAME
GEOLOGICAL MATERIALS COLOR
Use a second sheet, if needed
REMARKS, ELEVATION, SOURCE OF DATA, etc,
Section No.
5
Brown Med
IMPORTANT - FILE WITH PROPERTY PAPERS
WELL OWNER COPY I
MINNESOTA' DEPARTMENT OP HEALTH
WELL AND WRING RECORD
Minnesota Statutes, Chapter 1031
Fraction
SW, s;
property o nar &mailing address if different than well location address indicated above,
40 Bolan Aver North
� ?
geigllts, MN 55082
Well owner's mailing address 11 drtterent than property owners address Indicated above.
HARDNESS OF FROM
MATERIAL
- TO
•t
Clay & Gravel. Brown tlard
Lime Yellow Hard 95 26
Sandrock '
22
06
1 712457
WELL DEPTH (completed)
3 4:›G
DRILLING METHOD
❑ Cable To61
❑ Auger
❑
DRILLING FLUID
USE
�r
� • 105 €t,
GROUTING INFORMATION
Well grouted
Grout material
Mc
Licensee : usinsss Na
it.
1 II, FROM
CASING DIAMETER WEIGHT
Date Wont Completed
. ❑ Driven ❑= Dug
Rotary • ' ❑, Jetted
MINNESOTA UNIQUE WELL NO.
722457 ,.
WELE•HYDAOFRAGTURED? ■ Yes
. ft. '7O ft,
❑ Mon Wring ❑ Heating/cooling
❑ Domestic 0 Environ. Bore Hole • ❑ Industry/Commercial
❑ Nonccmmunily PWS Irrigation ❑ Remedial .
: Community PWS �[ Dewatering . ❑ .
CASING HOLE DIAM.
Drive Shoe? )4 Yes ❑ No
•
Steel ❑ Threaded j Welded • ,
'❑ Plastic ❑ . .. :.
4 /9 , 5 4
4
in. to., fY ft. �..` , . Ibs./IL
3n, to ft.
OPEN HOLE
WELL HEAD COMPLETION
❑ Pitiess adapter manufacturer Model
❑ Casing Protection X 12 in. above grade
At -grade (Environmental Wells and Boring ONLY)
rrt. t ft
l in. t.V '5lL.
SCREEN
Make FROM_2 Y ft. TO 06 ft.. ;
Type Diem.
Slot/Gauze Length
Set between it. and _ ft. FITTINGS
STATIC WATER LEVEL
,. below ❑ above land surface Dale measured . ,..
PUMPING LEVEL {below land surface) .
)12,5 ft. after ttr3. pumpin --�, g.p.m.
Yes ❑ No
Neat cement 0 Bentonite ❑ Concrete ❑ High Solids Bentonite
from. tc_ it. ❑ yds. ❑ bags
irarn_A_ _,_, to�� ft. yds. ❑ bags
from to f1. 0 yds. ❑ bags
NEAREST KNOWN SOURCE OF CONTAM1N TION
feet �,�' direction C type
Well dis's 1 Geed upon completion ❑ Yes ❑ No 4,4'1\1e ;
PUMP
Not installed Date installed
Manufacturers name
Model number 7 4� HP, P0 Volts
ff
Length of drop p €pe t ft. Capacity g.p.m,
Type: [ submersible ❑ L.S. Turbine ❑ Reciprocating ❑ Jet ❑
ABANDONED WELLS
Roes property have any not in use and not sealed well(s) ❑ Yes ' No
VARIANCE
Was a variance granted from the MDH tor-this well? j Yes SeNo 'TN$
WELL CONTRACTOR CERTIFICATION
This well was drifle.. • -r my sup. "n and in accordance with Minnesota Rules, Chapter 4725.
The inlarmelb n • ■ rtta'sn • • 'n ttt
true to the best of my knowledge.
Sons, 1
2054
Authorized Re • Tsenfafivo Signature • Data
_Kirames l3aue
Name of Dri/Ier
FIE 01205.48- (Flo. 5/02)
EXHIBIT "13"
SPECIAL WELL CONSTRUCTION AREA
EDIT "C"
CORRESPONDENCE FROM CITY ENGINEER
Bonestroo
Rosene
Ander &
Associates
Engineers & Architects
October 1, 2004
Mr. Eric Johnson
City Administrator
City of Oak Park Heights
14168 Oak Park Blvd., P.O. Box 2007
Oak Park Heights, MN 55082 -2007
Re: McKean Square
Irrigation Well
BRA File No. 55-03-129
Dear Eric:
Bonestroo, Rosene, Anderiik and Associates, Inc. is a. irmative Action /Equal Opportunity Employer
and Employee Owned
Principals: Otto G. Bonestroo, P.E. • Marvin !., Sorvala, RE.. Glenn R. Cook. P.E. • Robert G. Schunicht, PE..
Jerry A. Bourdon, RE. • Mark A. Hanson, PE.
Senior Consultants: Robert W. Rosene, PE.. Joseph C. Anderiik, P.E. • Richard E. Turner, PE.. Susan M. Eberlin, C.PA.
Associate Principals: Keith A. Gordon, PE. • Robert R. Pfefferle, P.E.. Richard W. Foster, PE. ■ David 0. Loskota, RE.
Michael T. Rautmann, P.E. • Ted K. Field. P.E. • Kenneth P. Anderson, PE. • Mark R. Rolfs, PE. • David A. Bonestroo, M.B.A. .
Sidney P. Williamson, RE., L.S. • Agnes M. Ring, M.B.A. • Allan Rick Schmidt, PE. • Thomas W. Peterson, P.E. •
James R. Maland, PE. • Miles B. Jensen, RE. • L. Phillip Gravel I11, PE. • Daniell Edgerton. P.E. • Ismael Martinez, PE. •
Thomas A. Syfko, PE. • Sheldon J. Johnson • Dale A. Grove, PE. • Thomas A. Roushar, RE. • Robert J. Devery, RE.
Offices: St. Paul, St. Cloud. Rochester and Willmar, MN A Milwaukee, WI • Chicago, IL
Website: www.bonestroo.com
We have reviewed the permit application submitted for water appropriations for the McKean
Square irrigation well. Based on our preliminary analysis of the information., we have the
following comments:
1. The location and proposed pumping rate of the irrigation well does not appear to pose a
threat to the existing Oak Park Heights municipal wells. The distance from the current
municipal wells is likely great enough that drawdown interference from the irrigation
well on the municipal wells would be negligible.
2. The irrigation well would not likely preclude the City from installing a new municipal
well in the same general area of the City, assuming the new municipal well were located
at least 500- 1000 feet from the irrigation well. While the irrigation well would be
expected to have some interference on a municipal well in this area, the amount of
interference is likely to be small enough as to not significantly degrade the performance
of a municipal well.
3. A new municipal well located near the irrigation well, however, may have some adverse
impacts on the irrigation well. Specifically, drawdown interference from a high capacity
municipal well may lower the water level in the irrigation well enough to affect the
performance of that well. In the Well and Boring Record for the McKean Square
irrigation well (unique number 712467), the static water level is noted to be 75 feet, with
a pumping level of 175 feet at 300gpm (gallons per minute). The drop pipe length of the
pump was left at 175 feet, with the pump capacity of 300gpm.
The irrigation well is initially planned to pump at 250gpm, which would result in a
predicted pumping level of 158 feet, leaving only 17 feet of available head between the
pumping level and the end of the drop pipe. A nearby municipal well pumping at 1000-
1500 gpm could easily have an influence that results in 10 -20 feet of additional
drawdown at the irrigation well, depending on the distance between the wells and the
2335 West Highway 36 6 St. Paul, MN 55113 ' 651-636-4600 E Fax: 651 - 636 -1311
local transmissivity of the aquifer. This could cause the irrigation well to pull air while
both wells are pumping simultaneously. Additionally, further municipal wells (i.e. a
fourth City well) would compound the amount the drawdown at the irrigation well.
Based on our preliminary analysis, we highly recommend that the operators of the McKean
Square irrigation well consider lowering the drop pipe to their pump to gain additional available
head. Since the irrigation well is cased down to 245 feet, there is sufficient room available to
lower the pump in the irrigation well.
Additional analysis of the potential well interference issues can be completed when sites for
future municipal wells are selected.
If you have any questions or require additional information, please contact me at (651) 604 -4815
or Mark Janovec at (651) 604 -4831.
Sincerely,
BONESTROO, ROSENE, ANDERLIK & ASSOCIATES INC
-n00 /7
Dennis M. Postler, P.E.
cc: Tom Ozzello, Public Works Director
Jim Butler, Building Official
Scott Richards, City Planner
Mark Vierling, City Attorney
Kathy Widin, City Arborist
Todd A. Erickson - Folz, Freeman, Erickson, Inc.
DMP, DDH, File -- Bonestroo & Associates
K:155155031291W ord\Work_In_Progress'rrigation Well comments_1 O- 1- Q4.doc
EXHIBIT "D"
COPY OF THE LETTERS RECEIVED BY THE CITY RELATED TO WELL
CONCERNS:
1) FROM ME MINNESOTA DEPARTMENT OF HEALTH, MR. STEVEN
W. ROBERTSON, HYDRO - GEOLOGIST, DATED MARCH 21, 2000.
2) FROM THE MINNESOTA POLLUTION CONTROL AGENCY, MR.
MICHAEL KANNER, DATED APRIL 13, 2000.
March 21, 2000
Dear Mayor Schaaf:
Protecting, Maintaining and Improving the Health of All Minnesotans
The Honorable Dave Schaaf
Mayor, City of Oak Park Heights
14168 Oak Park Boulevard North
P.O. Box 2007
Oak Park Heights, Minnesota 55082
This letter is in response to an inquiry from Mr. Dave Beaudet '
regarding wellhead protection and
new well placement. The Minnesota Department of Health (MDH) administers the
, currently adm�nl
wellhead protection and source water protection programs in the state �' fate o f Minnesota. The wellhead
protection program is mandatory, and the city of Oak Park Heights will be responsible
its � p able for conducting own planning. The city was notified in Feb g
February 1999 that it has until February 12, 2002, to
complete its wellhead protection plan.
In talking to Mr. Beaudet, we learned that the city is considering locations g cations for new wells. Our
interest at MDH is to help public water suppliers produce the highest quality •
g q tydnnking water supplies
possible for a given area. Accordingly, we thought we should remind .
gh ern�nd you of the Special Well
Construction Area that is established in Baytown Township, •
� P� south of the city of Oak Park
Heights. This well advisory was issued on May 1 98 S because •
Y � se volatile organic chemicals were
detected in drinking water wells. The contaminants detected include trichlorethyiene (TCE), carbon
tetrachloride, tetrachloroethylene, and cis- 1,2- dichloroeth lene, contamination The contam�nat�on has been
detected in wells completed in the surficial sand aquifer, Prairie Chien �e du Chen dolomite, and Jordan
Sandstone. The location of the northernmost boundary of the •
a.ry Special Well Construction Area is
shown on the attached figure. Some of our prospective locations •
Y .p p cations are close to this well advisory
area.
Water quality testing that was conducted last fall (Wenek, De . December 1 ���, Fall 1999 Water Quality � date �e ort Ba
P p Baytown Township Groundwater Contamination Site) documented
} that the plume
of contaminated groundwater has migrated beyond the boundaries y unda.ries of the Special Well Construction
Area. The Well Management Section of MDH is currently reviewing determine wing these data to deternl�ne how
to revise the boundaries of the area. The attached figure shows .
the portion of Section 8 that may be
added to the Special Well Construction Area area is identified line on the
(this nt�fied by the dotted yellow li
map). The attached figure also y
g o shows the approximate limits of the TCE lume as mapped ' P Aped in the
fall of 1999. Additional changes may also be made to the existing boundaries Special g anes of the Special Well
Construction ruction Area on the west and south.
The locations ofyour proposed wells fall outside the current and proposed Special Well Construction
Area; therefore, no special consideration or rior approval (other . p pp than the usual plan review) is
needed from MDH to construct your wells. However, the locations lacat�ons you are considering are
121 East Seventh Place • St. Paul, MN 55101 • http://www.health.state_mn.us
COPY
The Honorable Dave Schaaf
Page 2
March 2 2000
sufficiently close to the plume, and the rates you will need to pump are sufficiently high that careful
consideration should be made by you and your consultant to ensure the groundwater contamination
would not migrate northward and affect the well(s).
The other factor we wanted to bring to your attention, with respect to the proposed well(s), is the
bedrock valley oriented roughly in an east -west direction. Glacial deposits currently fill most of the
valley, and there is no obvious expression of the valley on the ground surface. The area of this
buried valley in which the Jordan subcrops is shown on the attached figure. The northernmost of
the proposed well sites is likely to be located directly over the bedrock valley. We can think of a
couple of potential problems with this location. First, while the Jordan is present at this location,
it is not present at its full thickness. The best information we have from the Minnesota Geological
Survey (MGS) suggests less than half of its usual 90 to 100 foot thickness may remain near that site.
Well production is directly related to aquifer thickness, and the smaller thickness of Jordan in this
area may adversely affect well yield. It is possible that some of the valley fill materials may be
sufficiently coarse to augment the production from the partial thickness of the Jordan, but MGS
characterization of the glacial deposits in Washington County suggests 150 feet or more of clay and
sand till may be present near the northernmost proposed well site. Second, recent experience in the
Stillwater area suggests that the Jordan is very soft and friable in areas where the Prairie du Chien
is absent or thin. At a well site in Stillwater, the driller has had trouble maintaining an open borehole
under such conditions. The well has been collapsing and they may need to find an alternate site.
Our interest in helping you make a sound decision with respect to your new well site is due to
MD11's responsibility for administering the wellhead protection program in Minnesota and our
interest in ensuring public health by protecting drinking water supplies. We would be willing to
meet with you, your council, andlor your staff to discuss the material described in this letter further.
Please contact me at 651/2154322 with any questions you have on this letter.
Sincerely,
Stephen W. Robertson, Hydrogeologist
Source Water Protection Unit
Drinking Water Protection Section
SWR:tvw
Enclosure
cc: Mr. Tom Melena, City of Oak Park Heights
Mr. Dave Beaudet, City of Oak Park Heights
bcc: Mr. Bob Smude, Engineer, Community Public Water Supply Unit
Mr. Art Persons, Planner, Source Water Protection Unit
Mr. Dave Beaudet
OPH V' No. 1
J
April 13, 2404
The Honorable Dave Schaaf
Mayor, City of Oak Park Heights
14168 57 Street North, Box 2007
Oak Park Heights, MN 55082
Dear Mayor Schaaf.
Minnesota Pollution Control Agency
It has recently come to our attention that the city of Oak Park Heights (City) is considering
installing a municipal water supply well or series of municipal wells just outside the Minnesota
Department of Health's (MDH) current well advisory area in the Baytown Township. As you
may know, the well advisory is in place due to trichloroethene (TCE) contamination primarily in
the 1'�xie Du Chien aquifer, but that also has been detected in some samples from the deeper
Jordan aquifer. The Minnesota Pollution Control Agency (MPCA) is currently itic the
Metropolitan Airports Commission (MAC) to ensure that all private water supply wells within
this advisory area exceeding health based limits for TCE are protected with granular activated
carbon filtration systems. This letter serves to advise the City of the following information that
should be carefully considered prior to commencement of municipal well installation.
• MDH is currently considering a revision of the well advisory boundaries, based on recent
ground water monitoring data Future boundary lines could potentially encompass a
significantly larger area than is now covered. This area could potentially include the
proposed municipal well locations.
• While the health risk limit (HR.) set by 1DH for TCE in drinking water is currently 3o1 g
for private drinking water wells, the applicable standard for municipal water supply wells is
the U.S. Enviromnent l Protection Agency maximum contaminant level (MCL) of 5 p ,"
▪ Installation and pumping of a large capacity municipal well (S3OgaIlons per minute) as we
understand is being proposed, carries with it the risk of expanding the TCE plume due to the
well's relatively large zone of influence. If this were to occur there could be potential
liability issues for the City, and if the new city wells) becomes contaminated the City could
incur additional high costs for installation of a municipal activated carbon treatment plant.
520 Lafayette Rd. N.; St. Paul, MN 551 55 -4194: (651) 296-6300 (Voice); (651) 292 -5332 (TTY)
St. Paul • Brainerd • Detroit Lakes • Duluth • Mankato • Marshall • Rochester • Willmar; www.pca.state.mn.us
Equal 40portunity Employer - Printed on recycled paper confining at least 20'' %Q fibers from paper recycled by consumers.
The Honorable Dave 5' iaf
April 13, 2000
Page 2
We are available to discuss this further, and recommend a meeting as soon as possible with the
City, MDH and MPC„A staff. If you have questions regarding this matta or would like to set up
a meeting, please contact Richard Baxter (651/297-8471) or Tun S (65 1/2967823) .
Sincerely,
Michael Kanner, Section Manager
Site Reme iation Section
Metro District
MK:smin
cc: Tom Me1eaa, City of Oak Park Heights
Pat Sarafolian, M"inaesota gat of Health
6
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