05-21-84 S&W Comm Minutes4:00 P. M.
May 21, 1984
SEWER AND WATER COMMITTEE
40
The committee met on this date in the committee room at City Hall. Present were com-
mittee members Nystul, Springer and Ruiz, Councilman Manning, Superintendent Hughes
and Tom Flynn. -
Water and Sewer Rates
The Chairman raised the question of out -of -city sewer charge as proposed being 200%.
Must be able to have a reasonable logic for the charge. Items presented by those pre-
sent included that Whitefish, Columbia Falls and Billings charge that amount for out -
of -city sewer; there are capital costs we must anticipate assuming the future; the
length of the force main without any other users; hook-up fees, etc.
Councilman Springer moved the recommendation of the consultant, Tom Flynn, be con-
curred with, seconded by Councilman Ruiz. Chairman Nystul not in favor.
The Chairman raised the question of the computation of the number of commercial units
for a minimum bill. It is difficult for the staff to administer. Mr. Flynn presented
some computations indicating that the selected businesses were not all adversely
effected. Some were to a small degree. Discussion held.
Councilman Springer moved to accept the recommendation of the consultant. Councilman
Ruiz second. Chairman Nystul not in favor.
Both rate proposals as prepared by Tom Flynn will be presented to the Council to adopt
• the necessary resolutions.
Job Description
Superintendent Hughes presented a job description for another FTE at the Wastewater
Treatment Plant. The committee concurred and authorized its posting and filling.
The meeting adjourned at 5:00 P. M.
GN/ms
DEPARTMENT OF HEALTH AND ENVIRONMENTAL SCIENCES
TED SCNWINDEN, GOVERNOR
May 21, 1984
Honorable LeRoy McDowell
Mayor, City of Kalispell
P.O. Sox 1035
Kalispell, Montana 59901
COGSWELL BUILDING
IMLENA, MONTANA 59620
Re: Federal Sewage Works Grant
C300263-01 (Step 1)
Kalispell, Montana
Dear Mayor McDowell:
In the very near future, our office will make proposed modifications to the
MPDES permit for the Kalispell wastewater treatment facility which discharges
to Ashley Creek. This letter provides the criteria or limits we will use in
the revised permit. Your consulting engineer has requested this information
in order to prepare the final amendment or revisions to the Step 1 Wastewater
Facilities Plan. The two effluent parameters which we propose to add in the
modified permit are phosphorus and ammonia.
Phosphorus
As presented in the Strategy for Limiting Phosphorus in Flathead Lake, the
department has proposed a reduction in phosphorus discharged from municipal
wastewater treatment plants. The proposed phosphorus effluent limit from
Kalispell wastewater treatment plant (WWTP) is a maximum of 1.0 mg/l total
phosphorus.
Ammonia
Above certain concentrations, ammonia is toxic to fish. Ashley Creek is -
classified as a C-2 stream which states the water quality of the stream must
allow for growth and marginal propagation of salmonid fishes and associated
aquatic life. The component of ammonia which is critical in establishing
water quality criteria is unionized ammonia. The amount of totai ■imonia
which remains as unionized ammonia is a function of both temperature and pH.
As the temperature and pH rise, the fraction of total ammonia which remains as
unionized ammonia increases.
AN EQUAL OPPORTUNITY EMPLOYER"
Kalispell, Montana
C300263-01 (Step 1)
May 21, 1984
Page 2
The department is proposing an instream 30-day mean unionized ammonia limit
not to exceed 0.10 mg/l and a maximum limit not to exceed 0.14 mg/l. Effluent
discharged from the Kalispell WWTP must not cause the instream limits to be
violated.
Enclosed is limited data compiled by our office to aid your consultant. The
city should immediately initiate a program to collect daily temperature and pH
data both upstream and downstream of the WWTP discharge. Your engineer needs
to determine what portion and at what time of the year the discharge must
achieve ammonia reduction to maintain the above instream limits. Our
preliminary analysis suggests that ammonia reduction will only be required
when the temperature in Ashley Creek exceeds about 150C. Your consulting
engineer should carefully analyze instream and treatment plant data to
minimize the construction of treatment facilities to meet the limit. We
encourage your engineer to work closely with our office to achieve the most
cost effective solution while achieving instream limits.
If any questions arise, please contact our office (444-2406)..
Sincerely,
174"UZ Gr1Ca �
Mark S. Weston, P. E.
Environmental Engineer
Water Quality Bureau
Environmental Sciences Division
MSW:rel/0598b
cc: Paul Stokes, Stahly Engineering and Associates (with enclosure)
McLaughlin -Water Engineers (with enclosure)
Permit file
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