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1.3 <br />Table 1— Well Data <br />Wel1141! Year <br />No. Constructed <br />Formation <br />epth <br />Casing <br />epth (ft <br />Casing <br />Size (in) <br />Capacity <br />(gpm) <br />1 <br />1984 <br />Ironton -Galesville <br />320 <br />243 <br />14 <br />700 <br />o <br />1987 <br />Ironton -Galesville <br />320 <br />240 <br />14 <br />220 <br />3 <br />1997 <br />Ironton -Galesville <br />345 <br />222 <br />30 <br />1,450 <br />4 <br />1998 <br />Ironton -Galesville <br />321 <br />191 <br />30 <br />850 <br />5 <br />2000 <br />Ironton -Galesville <br />316 <br />215 <br />30 <br />850 <br />6 <br />2005 <br />Ironton -Galesville <br />390 <br />282 <br />30 <br />900 <br />7 <br />2007 <br />Ironton -Galesville <br />332 <br />216 <br />30 <br />850 <br />8 <br />2007 <br />Ironton -Galesville <br />354 <br />245 <br />30 <br />1,400 <br />Notes: Well No. 2 used exclusively for irrigation of River's Bend Park. <br />The combined capacity of all of the wells is 7,220 gallons per minute (gpm) which is equivalent to <br />10.4 million gallons per day (MGD). The firm capacity (capacity with the largest well out of <br />service) is 5,770 gpm or 8.3 MGD. <br />If a centralized water treatment plant is constructed, Wells No. 1 and 2 would not initially be <br />connected to the water treatment plant due to the significant expense required to extend trunk <br />watermain to the water treatment plant. The firm capacity without considering Wells No. 1 and 2 <br />is 4,850 gpm or 7.0 MGD. <br />All of the wells are located in the southern part of the City north of U.S. Highway 10, with Wells <br />No. 1 and 2 located in the south-eastern portion of Ramsey, and Wells No. 3 through 8 located in <br />the south-central portion of Ramsey. <br />Maintenance records indicate that the wells, pumps, and motors are inspected and repaired on a <br />routine basis. The condition of the wells, pumps, and motors system -wide appears to be good. <br />Current Water Treatment <br />Chlorine is added to the well water to provide a disinfectant residual in the distribution system. <br />The City utilizes a free chlorine residual in the distribution system rather than chloramine, which <br />is a less powerful disinfecting agent created when chlorine is mixed with ammonia. The City <br />does have low levels of naturally occurring ammonia in their well water, although chlorine is fed <br />past the breakpoint to completely oxidize the ammonia. <br />Polyphosphate is added to the water to sequester iron and manganese. Sequestering of iron and <br />manganese keeps the metals in solution and prevents them from precipitating to form oxides, <br />and thus preventing aesthetic water quality issues such as color, taste, and sedimentation. <br />Sequestration does not remove iron or manganese, and polyphosphate degrades over time <br />which may cause aesthetic issues at dead -ends and outer ends of the distribution system. <br />In accordance with Minnesota State Statute, fluoride is also added to the treatment process to <br />promote strong teeth. <br />The chemicals are added to the raw water from the wells in each of the pump houses prior to <br />being pumped into the distribution system. <br />FEASIBILITY STUDY RAMSY 154354 <br />Page 2 <br />