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Explanation: With the discovery of 1,4 Dioxane New Brighton has pumped water from Mount Simon <br />Hinckley. The operation of these wells changes how the Treatment Plant operators fill the towers. Prior <br />to 2015, operators were able to simultaneously turn on all of the wells to refill the reservoirs with 50 <br />degree water to reduce ice. We have not experienced a catastrophic freeze up, but we have had ice <br />develop, which can damage the internal coatings. See the enclosed Water Storage Ice Evaluation from <br />March 12, 2014 <br />In 2012 New Brighton repainted its High Service Tower. During this project the City also installed an <br />internal mixer which is designed to prevent ice buildup in the storage reservoir. <br />Moving into the winter of 2015-2016 will be operating only 3-4 wells in the system which will limit the <br />flow in and out of the storage reservoirs. With City Project 15-12, Staff recommends installing tank <br />mixers at the following locations: Forest Dale Tower; Ground Storage Reservoir, and the South Water <br />Tower. <br />The mixers will eliminate stratification, lower chlorine use, reduce/eliminate disinfection byproducts, and <br />help eliminate ice buildup. <br />Costs and Funding: The total cost of this project will be funded from Fund 400 — Water Improvement <br />Fund. <br />Craig Schlichting, P.E. <br />Director of Community Assets & Development <br />Attachments: March 12, Water Storage Ice Evaluation <br />KCI Proposal <br />Email from In Control <br />Solar Bee Information <br />