Ramsey 2040 Comprehensive Plan No Appendices (2)

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218 Wastewater Plan Overview and Background Growth of population and jobs in a community can present challenges to ensuring the needs of residents and businesses are adequately met. One of the key elements in addressing this challenge is the planning, construction, and maintenance of adequate wastewater collection systems. A Wastewater and Comprehensive Sewer Plan is a useful tool for defining the strategies the City will use to accomplish planning, construction, and maintenance of the wastewater system. Under the state Metropolitan Planning Act, local governments are required to submit a wastewater and comprehensive sewer plan element as part of their overall comprehensive plan. This includes describing service needs from the regional system in support of planned growth. Prior to any expansion of sanitary sewer service, this plan must be found consistent with the regional 2040 Water Resources Policy Plan produced by the Metropolitan Council. In 2005 the City of Ramsey completed a Comprehensive Sanitary Sewer Study which was prepared by consulting engineers Bolton & Menk, Inc. The 2005 Plan presented a guide plan for the extension of the sanitary sewer trunk system to the entire City. In 2012 the City updated the 2005 Comprehensive Sanitary Sewer Study. This update focused on the proposed sanitary sewer trunk extensions and improvements which are required to provide service to all areas within the 2030 MUSA boundaries. In September, 2017, the City completed an update to the 2012 Comprehensive Sanitary Sewer Study. The 2012 study and 2017 update identified the ultimate sanitary sewer flows for the City. The City of Ramsey is considered by Metropolitan Council to be a “Developing Community“ and as such is presently allowed to extend sanitary sewer service anywhere within MWCC Sanitary Sewer District 3 boundary (south of Trott Brook). The current extent of the sewered area is now adjacent to Trott Brook and revised land use plans require its extension to the remaining portion of the City. The City’s current wastewater flow allocation is 3.8 million gallons per day (mgd). The 2017 update to the Comprehensive Sanitary Sewer Study completed by Bolton & Menk Inc. is incorporated in this Plan in Appendix B. Revised sanitary sewer flow projections based on the revised Future Land Use Map are included as Exhibit 8:1 of this Chapter. The flow assumptions for calculating sanitary sewer flow are as follows: Description Factor Gallons per Person per Day 75.0 Flow Variation Factor 2.5 to 4.0 People per Unit 3.0 Flow per unit 225 Employees per Acre 20 Commercial/Industrial Flow per Acre 1,500 Existing System The existing wastewater treatment system, shown in Figure 1 in Appendix A, includes 8 Lift Stations, forcemain and gravity sanitary sewer. This figure also shows the location of the two connection points to the MCES system. The City does not have a separate sanitary sewer treatment facility from the MCES,