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

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sewer, which serves the City's Rum River 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 an ultimate daily flow of 7.87 rngd which accommodates the entire City at full development. The 2030 MUSA at full development has a projected flow of 4.867 mgd which is based on a population of 33,893. The projected 2031 sewer service population is 25,828. Therefore, the 2030 MUSA will support a population of 8,065 or 2,987 residential units, greater than the projected 2031 population. The 2011 sewer flow for the City is 0.800 mgd. Based on the development projections, the 2012 to 2020 flow increase is 0.748 mgd for a total flow of 1.548 rngd. The 2012 to 2031 flow increase is 1.793 mgd for a total flow of 2.593 mgd. This is about 68 percent of the currently allocated flow allowance of 3.8 mgd. D. PROPOSED SANITARY SEWER TRUNK EXTENSIONS This Plan focuses on the proposed sanitary sewer trunk extensions and improvements which are required to service 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. This area is indicated on the Map under Item H in the Appendix. The extensions to service the 2030 MUSA are required in the following three areas and are shown on Figure 1 in the Appendix. 1. Subdistrict M3 located in the southwest corner of the City south of Highway 10. The improvements consist of an 18-inch gravity crossing of Highway 10, lift station, forcemain and trunk sewer extensions. 2. Subdistrict M4 located west of Armstrong Boulevard. The improvements consist of gravity sewer extension along the extension of Bunker Lake Boulevard. 3. Subdistricts R21 through R25 located north of Trott Brook in the north central portion of the City. Improvements in this area consist of gravity sewer extensions north of the existing lift station in the Brookfield neighborhood to service the area west of CSAH 5. The area east of CSAH 5 will require a lift station, forcemain and gravity sewer City of Ramsey Page ES-4 Comprehensive Sanitary Sewer Plan - 2012 Prepared by Bolton & Menk, Inc.