Comp Plan 1978-1980 FILE #2 - Laserfiche WebLink

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1990 sewer service to Ramsey is expected to accommodate a sewered popula- tion of 6,000 and a domestic sewerage flow of .57 MGD. Based on the above, Ramsey may wish to assume 1984 will be the date that' metropolitan sewer service will be initially available at the western border of Anoka and through the second Ramsey connection. Growth staging and local trunk sewer phasing could be based on this initial service date. The question of how much metropolitan sewer capacity will be available over time may still be a major concern to the city. Design assumptions* for the Anoka segment of the metropolitan sewer system which will serve Ramsey are based on approximate ultimate flow for Ramsey of 3.95 MGD at the second Ramsey connection ~-~~ MGD at the Anoka western border connection. These capacity design parameters indicate an ultimate resi- dential sewered population of 46,500 (@ 100 gallons per person per day flow) and industrial flow reflecting employment of 1,500. Ramsey may wish to discuss use of a greater share of this ultimate design capacity than the 6,000 person, 1990 sewered population contained in the 208 plan. If this is the case, discussions between the city and Metropolitan Council, and Metropolitan Waste Control Commission staff should be initiated now to define appropriate approaches for addressing this issue. (*Design Review Report-Anoka Interceptor, Short, Elliot, Hendrickson, March 1978) C. Other sewer issues A preliminary review of the Ramsey Comprehensive Sewer Plan by Metropolitan Council and MWCC staff has identified the following concerns which should be the subject of further discussion with the city. The design of the local collection system to provide for storage and off-peak pumping to allow future, long-term service to northern portions of Ramsey. It is felt that the collection system that is initially provided should be sized based on its ultimate service function. Storage and off-peak pumping are normally used as remedial measures rather than being intentionally used as a design solution. The 70 gallons per person per day flow assumptions. It is felt that flow should be increased to reflect potential inflow/infiltration or that an additional infiltration factor should be used in determining system sizing. In terms of the provision of initial metropolitan sewer service, more definite assurances should be provided indicating close coordination between the installation of local sewers and the construction of the metropolitan system. In other words, the MWCC does not want a situation where the metropolitan facility would be completed and there would be delays in local system construction which would cause lack of use of the metropolitan sys- tem for some time. -'~lf Ramsey is going to request interim service from the existing Anoka plant prior to the completion of the permanent metropolitan sewer service alter- native (CAB interceptor or expanded Anoka plant), details should be pro- vided on the amount of interim service that is needed.