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of Natural Resources staff have indicated that future well construction will need to be <br />coordinated with the overall water use of the area, and the pressure put on the Ironton -Galesville <br />aquifer to meet the region's water demands. Consideration of use of surface water sources, such <br />as the Mississippi River, will need to be addressed. This is discussed in further detail in Section <br />5- Water Supply and Treatment. <br />TABLE 3.4 <br />CITY OF RAMSEY, MINNESOTA <br />PROJECTED WATER SUPPLY REQUIREMENTS <br />Year <br />Average Day <br />Demand (mgd) <br />Maximum Day <br />Demand (mgd) <br />Total Wells <br />Required*** <br />Firm <br />Capacity* <br />Total <br />Capacity** <br />2004 <br />1.69 <br />5.90 <br />6 <br />4.494 <br />6.234 <br />2009 <br />3.89 <br />11.68 <br />12 <br />10.614 <br />12.354 <br />2014 <br />4.93 <br />14.80 <br />15 <br />13.674 <br />15.414 <br />2020 <br />6.18 <br />18.55 <br />19 <br />17.754 <br />19.494 <br />*Existing Firm Capacity is 3.474 mgd <br />** Existing Peak Capacity 5.214 mgd (5 existing wells) <br />***Assumes new well capacities 1.02 mgd (850 gpm) <br />C. WATER TREATMENT <br />1. Existing Water Treatment Facilities <br />Water treatment for the City of Ramsey consists of chlorination, fluoridation and <br />polyphosphate addition at each pump house. Chlorine is added as a preventive <br />measure. Chlorine acts as a disinfectant, and works to prevent the growth of <br />harmful bacteria within the distribution system should contamination occur. <br />Fluoride is added for the purpose of reducing tooth decay as prescribed by the <br />State of Minnesota. The addition of polyphosphates accomplishes two things. <br />Primarily, polyphosphates prevent the iron in the water from precipitation causing <br />staining problems. However, they are not as effective in preventing manganese <br />staining. Secondary, polyphosphates reduce the corrosion potential of the water, <br />thus prolonging the life of copper pipes in homes. <br />2. Water Treatment Infrastructure Needs <br />All current water sources for the City of Ramsey exceed recommended levels for <br />Iron and Manganese. As the city's population continues to grow, it is anticipated <br />City of Ramsey, Minnesota — M21.34343 Page 3-5 <br />Water System Study Prepared by Bolton & Menk, Inc. <br />