INFORMATION #1 07-06-1993
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INfORMATION
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. City of ~
Ell{ River
June 30, 1993
Honorable Mayor and City Council
Otsego City Hall
13474 NE 95th Street
Otsego, MN 55330
RE: JOINT SEWAGE TREATMENT PLAN
Dear Council Members:
Construction cost for an expansion project of this capacity would probably be about six million
dollars. If the joint sewage treatment plan is implemented, the plant's capacity would be
increased to 2.55 MGD and the construction would cost an additional one million dollars. Other
costs include the sharing of existing facilities, metering and sampling of Otsego's sewage, and
redesign and administration fees as shown in the attached Exhibit. Total construction cost for
Otsego would probably be $1,500,000 without taking into account the collection system and lift
stations for sewage conveyance. The subsequent sewage treatment charge would probably be
$2.00/1,000 gallons for the first year (1995) and would be subject to adjustment each year.
Design of the WWTP expansion has begun due to the fact that the existing facilities appeared to
reach the critical operational capacity earlier this year. All of our treatment units had to be
operated in order to control the effluent quality. The joint plan will inevitably delay the project
schedule and may potentially cause the existing plant to violate effluent standards.
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P.O. Box 490 . 13065 Orono Parkway · Elk River, MN 55330 · (612) 441-7420 · Fax: (612) 441-7425
Equal Opportunity Housing and Equal Opportunity Employment
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Honorable Mayor and City Council
June 30, 1993
Page Two
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Therefore, we strongly recommend the City of Otsego to consider other sewage treatment options
and reinvestigate the cost effectiveness of all options. The impact of project delay is hard to
predict at the present time. We could evaluate it if Otsego is still interested in sharing our
WWTP after investigating other options. In the meantime, we will continue to design our
proposed expansion.
If you have any questions, please feel free to contact me.
Very truly yours,
~}JI~
Patrick D. Klaers
City Administrator
City of Elk River
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EXHIBIT
EXPENSES FOR THE CITY OF OTSEGO
WASTEWATER TREATMENT PLANT EXPANSION
City of Elk River , Minnesota
Maier Stewart & Associates, Inc.
June 1993
Design Capacity, Million Gallons per Day (MGD)
City of Elk River
City of Otsego
Total
Influent
Effluent
biochemical oxygen demand (BOD), mg/!
total suspended solids (TSS), mg/!
BOD, mg/!
TSS, mg/l
Construction Cost for 2.2 MGD Expansion
Construction Cost for 2.55 MGD Expansion
Otsego's Cost:
A.
Additional Construction Cost
B.
Share of Existing Facilities
($1,500,000 x 0.35/2.55)
C.
Metering and Sampling of Otsego' s Sewage
D.
Redesign Fee
E.
Administration Fee
TOTAL2
2.20
0.35
2.55
2001
2251
10
12
$6,000,000
$7,000,000
$1,000,000
$200,000
$100,000
$100,000
$100.000
$1,500,000
Estimated Annual O&M Cost in 19953
$2.00/1,000 gallon
Probable Annual O&M Cost for Otsego
$2..00 x 350 x 365 ==
$256,000
NOTES~
Industrial wastewater with higher BOD and TSS concentrations should be pretreated to this
level before entering the treatment plant.
2
Does not include the lift station and forcemain from Otsego to Elk River.
3
Actual annual O&M cost should be calculated and adjusted each year based on the actual
expenses and volume of wastewater received.
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