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The following infrastructure is anticipated to begin sewer service: <br />- Non-Trunk Sewermain: 8-inch pipe can be extended to connect the southern most areas to the <br />existing sanitary sewer system by gravity. Portions of the southern areas may need a small lift <br />station or a low pressure system due to ground elevations. <br />- Lift Stations: The Regional Lift Station and the NW-LS-2 will be needed if sewer service is extended <br />initially beyond 198th Avenue NW. It is anticipated that an initial firm pumping capacity of 750 gpm <br />be needed at the Regional Lift Station during the first 10 to 15 years of operation. The lift station's <br />firm pumping capacity can be increased as development progresses. The anticipated firm pumping <br />capacity for the NW-LS-2 is 425 gpm. <br />- Forcemains: The 12-inch, 16-inch, and 6-inch forcemains for the Regional and NS-LS-2 lift stations <br />will be needed to begin service if development is extended beyond 198th Avenue NW. Air release <br />valve manholes will also be needed. <br />- Trunk Sewermain: The proposed 12-inch and 10-inch trunk sewermains will be needed to connect <br />the Regional Lift Station with the gravel mining areas if those areas develop initially. <br />- Connection at VWVfP: A new intake structure will be needed at the Elk River WWTP to receive the <br />wastewater pumped by the Regional Lift Station. The cost of the receiving structure is not included <br />in this report. <br />Feasibility Report <br />Northeast & Northwest Urban Service Area Expansion Study <br />City of Elk River, MN <br />WSB Project No. 020010-000 <br />Page 29 <br />