Agenda - Parks and Recreation Commission - 04/10/2014

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C. EVALUATION OF EXISTING FACILITIES At this time the regional components to serve the City of Ramsey are inplace. However 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. Currently, the Metropolitan Council is organizing a study to evaluate the sizing of the regional facilities based on updated land use and density projections for the northwest metropolitan area. The goal of the of this study is to determine what upgrades are necessary and feasible to accept the long term sewer flows received from the City of Ramsey and other communities served by the same facilities. Ultimately, 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 served by 30 -inch reinforced concrete pipes. Sewer Planning for the City has been and continues to be based on the know capacity of the two 30 -inch interceptor sewers. At the present time, sanitary sewer service is provided to several subdivisions within Ramsey, mostly in the southeast portion of the City. The City of Ramsey's two interceptor sewers were designed for a combined flow of 7.87 million gallons per day (mgd). The interceptor sewer, which serves the City's Mississippi River Sewer 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 sewer, which serves the City's Rum River Sewer District was designed for an average daily flow of 3.95 mgd and consists of a 30 -inch reinforced concrete pipe that has a capacity of 12.6 cfs or 8.14 mgd. On a local level, sewer planning will continue to be based on the ultimate average daily design flow of 7.87 mgd. On a regional level, the MWCC will be initiating a study to evaluate the capacity needs of regional facilities to determine what additional capacity allocation can be assigned to the City of Ramsey. It is anticipated that the study will be completed by the end of City of Ramsey Page ES -3 Comprehensive Sanitary Sewer Plan - 2004 Prepared by Bolton & Menk, Inc.