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Table 18.6: Rum River District Projected Future Wastewater Flows by Sub -district <br />Sub -district <br />Northwest MUSA Sub -district <br />Northeast MUSA Sub -district <br />Rural Sub -district <br />Sub -total <br />Existing MUSA <br />TOTAL <br />Existing <br />Average <br />Daily Flow <br />d <br />0 <br />0 <br />0.390 <br />0.390 <br />Existing <br />Peak Hourly <br />Flow (gpd) <br />0 <br />0 <br />1.119 <br />1.119 <br />Future <br />Average Daily <br />Flow (MGD) <br />0.097 <br />0.021 <br />2.221 <br />2.339 <br />0.390 <br />2.729 <br />Future Peak <br />Hourly Flow <br />(MGD) <br />0.287 <br />0.063 <br />5.775 <br />6.081 <br />1.119 <br />5.704 <br />The combined projected average daily flow for the Rum River District is 2.729 MGD <br />with peak flows reaching 5.704 MGD. Therefore, there appears to be sufficient capacity <br />in the MUSA regional interceptor which is designed for a peak flow of 8 MGD. Again, it <br />is recommended that the City reevaluates their MCES allocation of the interceptor <br />capacity prior to performing an update of their Comprehensive Sewer Plan. <br />Combined City of Ramsey Flows. Table 18.7 below shows the total future average daily <br />wastewater flow for the entire City to be 6.4 MGD with a peak hourly flow of 12.2 <br />MGD. It should be noted that these flows assume the maximum possible density at final <br />build -out and, therefore, represent the most conservative scenario. As a result, it appears <br />that the existing interceptors are large enough to carry the projected future average daily <br />flows, as well as the projected future peak hourly flows. However, it appears that the <br />future average daily wastewater flow is above the MCES allocated flow of 2.8 MGD as <br />well as the higher allocation of 3.8 MGD. Discussions with MCES on allocated capacity <br />should begin. <br />Table 18.7: Projected Wastewater Flows for 2020 <br />Sub -district <br />Mississippi River MUSA District <br />Rum River MUSA District <br />TOTAL <br />Future <br />Average Daily <br />Flow (MGD <br />3.7 <br />2.7 <br />6.4 <br />Future Peak <br />Hourly Flow <br />MGD <br />6.5 <br />5.7 <br />12.2 <br />Average <br />Annual Flow <br />1,350 <br />985.5 <br />2,336 <br />Summary of EnwAAuiuiicntal Impact. The provision of sanitary sewage collection and <br />transport to a treatment facility is a normal urban service provided by a community as its <br />urban area develops. There is no adverse environmental impact expected as long as the <br />plan for provision of this service is followed according to the City's 2001 Comprehensive <br />Plan, as amended in 2002 and coordinated with MCES. <br />18-10 <br />