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Feasibility Study <br />Water Treatment Plant <br />City of Lino Lakes, MN <br />WSB Project No. 015822-000 Page 4 <br />2. EXISTING WATER SUPPLY SYSTEM <br />2.1 Sources <br />The City of Lino Lakes currently has six (6) groundwater production wells. A test well and study <br />has been completed for proposed Well No. 7. The existing well information is summarized in <br />Table 2-1. The City is currently operating Well Nos. 5 and 6 at a lower pumping rates to improve <br />operational efficiency for these wells. <br />Table 2-1. Production Wells <br />Well No.Unique <br />Well ID <br />Year <br />Installed <br />Depth <br />(feet)Aquifer <br />Rated <br />Capacity <br />(gpm) <br />Current <br />Pumping <br />Rate <br />(gpm) <br />1 240171 1971 306 Prairie du Chien <br />- Jordan 675 590 <br />2 110471 1986 258 Jordan - <br />St. Lawrence 625 693 <br />3 559373 1995 283 Prairie du Chien <br />- Jordan 1,800 1,187 <br />4 554207 1995 338 Prairie du Chien <br />- Jordan 750 644 <br />5 722629 2005 273 Prairie du Chien <br />- Jordan 1,600 810 <br />6 767887 2016 295 Prairie du Chien <br />- Jordan 1,200 953 <br />Total Capacity 6,650 4,877 <br />Firm Capacity (largest well out of service)4,850 3,690 <br />2.2 Treatment <br />The City of Lino Lakes does not have a water treatment facility. Instead, chemicals are applied at <br />each of the individual well houses. Chlorine is applied for disinfection, fluoride to prevent tooth <br />decay, and polyphosphate to sequester manganese and iron. Polyphosphate does not remove <br />manganese from the City’s drinking water, it only prevents very small amounts of manganese <br />from precipitating to help reduce the staining of plumbing fixtures and laundry. <br />2.3 Storage <br />The City has two existing water towers, and a third water tower is currently under construction. All <br />three water towers share a common high water elevation of 1,054.5 feet. All three towers have <br />altitude valves that automatically stop the flow of water into the tower when it is full, thereby <br />forcing the water to flow to and fill the other parts of the system. <br />Table 2-2. Water Towers <br />Tower <br />No.Status <br />Year <br />Constructed Volume <br />(MG) <br />High <br />Water <br />Level (ft) <br />1 Existing 1992 1.0 1,054.5 <br />2 Existing 1996 1.0 1,054.5 <br />3 Under Construction 2021 1.5 1,054.5 <br />Total 3.5 1,054.5