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City of Mounds View 1 2040 Comprehensive Plan DRAFT November 27, 2019 The City of Mounds View is served by two Met Council interceptors, 4-NS-523 and 4-NS-524. Mounds View's wastewater flow is treated at the Metropolitan Waste Water Treatment Plant in St. Paul. Several improvements are planned for this facility through 2040 to provide for additional plant capacity and to meet required permit standards. The Met Council has established infiltration/inflow (I/1) goals for all communities discharging wastewater to the Metropolitan Disposal System. Since excess I/1 is a local concern to Mounds View as well as a regional concern to the Metropolitan Council, Mounds View will continue to work on reducing I/1 in its sanitary sewer. The City's goals generally are to identify and prevent I/1 from exceeding local and regional system capacity and causing local backups, and to work to remove 1/1 from the system to the greatest extent practicable. As demonstrated in Table 6-1, the community's sewer flow is anticipated to decrease slightly by the year 2040, largely due to water conservation efforts. The City does not anticipate any capacity issues with the existing sewer system. SURFACE WATER MANAGEMENT Mounds View is within the Rice Creek Watershed District. The City has updated its local surface water management plan to reflect the needs of the watershed district and the Metropolitan Council. A draft plan has been prepared and is currently (2019) under review by the watershed district and Met Council. A full copy of the plan will be included in the appendices of this Comprehensive Plan upon completion. WATER SUPPLY PLANNING The City of Mounds View water system includes water supply, treatment, distribution, and storage to meet the water demands of the utility's customers. The utility operates five active groundwater wells to supply water and maintains two water tanks in the distribution system to sustain water system pressures and provide water during emergencies. The City's water system supply and storage is adequate to meet projected future water demands. The existing firm water supply capacity exceeds the projected 2040 maximum day demand. The existing water storage capacity exceeds future average day demand. While no new water system facilities are planned, maintenance and repair of existing facilities are ongoing. The water treatment facilities are currently (2019) being evaluated to determine necessary repairs and improvements to be made over the next five years. All public water suppliers in Minnesota that operate a public water distribution system, serve more than 1,000 people, and/or all cities in the seven -county metropolitan area, must have a Water Supply Plan (WSP) approved by the Department of Natural Resources (DNR). The City of Mounds View Water Supply Plan is required by the DNR and Metropolitan Council. The Mounds View WSP was originally submitted in December 2016 and was updated in January 2019. A full copy of the plan is included in the appendices of this Comprehensive Plan. Inflow & Infiltration One Million Dollars, per year! That is the cost of treating sewage that the City of Mounds View pays to the Metropolitan Council each year to have our sewer lines connected to their sanitary sewer treatment system. I & I, or Inflow and Infiltration comprises somewhere from 20% to 25% of that bill. Inflow is waste water going down the drain. Flushing toilets, showers, sinks, washing machines, etc. It is not lawn sprinkling as that goes back into the ground or down the storm sewer. Infiltration is seepage into the underground sewer lines, both the City collector lines and the lateral line from the house/business to that collector line. Cracks occur do to settling, roots, or construction activity and with our high water table, ground water or clear water, seeps into the pipe. You can HELP, do not let the faucet run in the sink. Use water saving appliances and low flow shower heads. 100% of our lines will be inspected and re -lined within the next 10 years. A proposed ordinance will require homeowners to inspect and repair their lateral line at the point of sale. Chapter 6: Water Resources 16-2