HomeMy Public PortalAboutSewer Capacity IssuePayette Lakes Water and Sewer DistricT
201 JACOB STREET · McCALL, IDAHO 83638
· OFFICE (208) 634-4111 · FAX (208) 634-7613
June 23, 1999
Mr. Bill Robertson
City Manager
City of McCall
P.O. Box 986
,JUN
Re: Wastewater Plant Storage Capacity Issue
Dear Bill,
During the past several months, I have noticed with great interest that the City and its
engineers are going through the process of trying to identify the storage needs of the
McCall Wastewater Treatment Facility as it relates to the J-Ditch Phase II upgrade
project. It seems that a continuing reduction in storage volume is occurring as the City's
engineers try to identify the present and future storage needs at the treatment facility.
The first rationale of capacity was presented to the City by previous consultants, as
approximately 360 million gallons of total effluent storage required. Whether that
volume represented an accurate picture of the City's design or if analysis criteria has
changed since the site issue developed, is of concern to the Payette Lakes Water and
Sewer District.
Since the original design volume for effluent storage has been re-evaluated, I have seen
volumes projected for design anywhere from a minimum of 203 million gallons to 260
million gallons of storage necessary to avoid a discharge to the North Fork of the Payette
River. Because some of the estimates seemed perceptually troubling, I decided to
undertake a staff study to arrive at comparative storage estimates using actual flow totals
provided in the normal course of agreement communications with the City.
The results of the simple analysis that was done are quite compelling to me and the
Payette Lakes Water and Sewer District Board of Directors. They indicate that using the
actual flow figures coming into the Wastewater Treatment Plant, during the actual period
that the City would be storing treated effluent in the 1998-99 season, that a discharge of
effluent would be necessary for this year, if 206 million gallons of effluent storage were
constructed. There are additional factors, which could affect the total impact of storage
volume necessary and were footnoted in the study but were not included in the raw data
compilation.
Please review this data and let me know if I have omitted or included factors that are not
appropriate when considering this issue within a proactive and responsible planning
viewpoint. I will welcome any questions or comments.
Thank you for your serious review.
Sincerely yours,
R.Ted Whiteman, Manager,
PLWSD
RTW:rtw
Cc~
McCall City Council Members
Payette Lakes Water and Sewer District Board Members
State of Idaho, Division of Environmental Quality
Bureau of Reclamation, Boise Office
RH2 Engineering, Redmond Wash.
Encl: Spreadsheet