Agenda - Council - 06/26/2012 - Laserfiche WebLink

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Table ES.2 Sanitary Sewer Flow Summary Comm. / Ind. Total Total Residential Other / Special Daily Description Office/Mixed Use Units Population Flow (mgd) Flow (mgd) Flow (mgd) Flow (mgd) Growth 2012 to 2020 2,080 5,970 0.448 0.300 0.748 Growth 2012 to 2031 4,940 14,394 1.080 0.713 1.793 2030 MUSA - Rum River 9,989 26,970 2.023 0.117 0.062 2.202 2030 MUSA - Miss. River 2,564 6,923 0.519 2.118 0.027 2.665 2030 MUSA - Combined 12,553 33,893 2.542 2.235 0.089 4.866 C. EVALUATION OF EXISTING FACILITIES At this time the regional components to serve the City of Ramsey are in place. The original sizing of these facilities was based on assumptions of land use patterns and densities that were developed before the regional sanitary sewer facilities were constructed. Originally, the North Trott Brook area was to receive sanitary sewer service from a future regional waste water treatment plant. However, the Metropolitan Council has now indicated that regional capacity can be provided through the existing Regional Disposal System by system capacity improvements. The Champlin -Anoka -Brooklyn Center (CAB) interceptor serves the City of Ramsey. The CAB provides 14 mgd capacity to the northwest metropolitan area including Ramsey. Locally Ramsey has two main sanitary sewer districts that are each serviced by 30-inch reinforced concrete pipes. Sewer planning for the City has been and continues to be based on the known capacity of the two 30-inch interceptor sewers. The City of Ramsey's two interceptor sewers are designed for a combined flow of 7.87 million gallons per day (mgd). The interceptor sewer, which services the City's Mississippi River Sewer District was designed for an average daily flow of 3.92 mgd and consists of a 30-inch reinforced concrete pipe that has a capacity of 15.4 cubic feet per second (cfs) or 9.97 mgd. The interceptor City of Ramsey Page ES-3 Comprehensive Sanitary Sewer Plan - 2012 Prepared by Bolton & Menk, Inc.