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7.0 Sanitary Sewer System Plan <br />The City of Gem Lake currently owns and maintains a sanitary sewer system that <br />currently serves all of the businesses at the Hoffman's Corners area and a segment <br />of the residential area along Scheuneman Road north of U.S. Highway 61. The <br />City of Vadnais Heights supplies sanitary sewer services to the Tousley Ford <br />property, the Montessori School at the corner of County Road E and Labore <br />Road, and several residences that neighbor the school. <br />Existing Sanitary Sewer System <br />The current system consists of approximately 13,400 Lineal Feet (LF) of sanitary <br />sewer pipe ranging from 8" to 12" in diameter of both vitrified clay pipe (VCP) <br />and polyvinylchloride pipe (PVC). There are approximately 65 manholes in the <br />system. There are no lift stations or forcemains within the existing system. Figure <br />7 shows the City's current sewer system. <br />Currently the system discharges into the Metropolitan Council Environmental <br />Services (MCES) System in four locations as shown in Figure 7.1. The system <br />discharges into a combination of both the VH-423 Interceptor and the 7122 <br />Interceptor. Currently the Met Council does not have a metering station near the <br />city limits of Gem Lake. <br />The existing condition of the City's sewer system was evaluated in the fall of <br />2006 / spring of 2007. A sanitary sewer system plan was developed in May of <br />2007 by SEH for the City. This plan was developed based on the field inspections <br />of manholes and a closed circuit televised (CCTV) inspection of the pipes. <br />Projected Flows <br />Projected flows for the sanitary sewer system shown in Table 7.1 uses the data <br />from the City's System Statement prepared in 2005 and linear projections to <br />estimate future flows. The projections were estimated based on historical flow <br />data and projected sewered housing and employment information. In 2006 the <br />City's average sanitary sewer flow measured by MCES was recorded as 0.027 <br />million gallons per day (MGD) and their current billing is 10 million gallons per <br />year. <br />SEH7.0 sanitary sewer system plan I page 42 <br />