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

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SECTION 4 PROPOSED SANITARY SEWER TRUNK SYSTEM A. GENERAL This Plan focuses on the proposed sanitary sewer trunk extensions and improvements which are required to provide service to all areas within the 2030 MUSA boundaries. In addition, the Special Area along 167th Avenue which is proposed to be added to the MUSA is also addressed. The 2005 Plan presented a guide plan for the extension of the sanitary sewer trunk system to the entire City. This is shown on Proposed Service Area Map, dated December 2005, which is Item J in the Appendix. This plan is still valid and will be of benefit when future areas are considered for MUSA expansion. Trunk sewers are mains that do not necessarily provide direct service to developable property but are necessary for system expansion or are mains that must be oversized or constructed at increased depth to provide service to future developments. Facilities such as lift stations or crossings of major highways or railroads are usually considered trunk costs. B. TRUNK SANITARY SEWER SYSTEM By utilizing aerial topography the existing unsewered subdivisions and undeveloped properties south of Trott Brook were evaluated in the 2005 Study to determine drainage areas. Based on this evaluation, proposed sewer sub -district boundaries were established so that each area will have a point to collect sanitary sewer flows into the trunk sewer system. It was proposed that a local sewer system would be developed to ultimately convey sanitary sewer flows to the trunk sewer system. The trunk sewers were proposed to be a combination of reinforced concrete pipes and PVC pipes. Pipe material will be determined based on the size and depth of the proposed lines. Table 4.1 summarizes the updated flow information for each of the proposed sanitary sewer districts based on the land use plan from the 2030 Comprehensive Plan and the design City of Ramsey Page 4-1 Comprehensive Sanitary Sewer Plan - 2012 Prepared by Bolton & Menk, Inc.