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

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SECTION 4 PROPOSED SANITARY SEWER TRUNK SYSTEM A. GENERAL In order to serve the unsewered portions of the City of Ramsey it will be necessary to extend the City's sanitary sewer trunk sewer system to individual sewer sub -districts as shown on Figure 3. Trunk sewers are lines that do not necessarily provide direct service to developable property but are necessary for system expansion or are lines 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 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 proposed that a local sewer system would be developed to ultimately convey sanitary sewer flows to the trunk sewer system. The trunk sewers are 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 flow information for each of the proposed sanitary sewer districts. City of Ramsey Page 4-1 Comprehensive Sanitary Sewer Plan - 2004 Prepared by Bolton & Menk, Inc.