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;ij <br />Building a legacy— your legacy. 701 Xenia Avenue South <br />Suite 300 <br />Minneapolis, MN 55416 <br />Tel: 763-541-4800 <br />Fax: 763-541-1700 <br />APPENDIX B — CITY OF LINO LAKES PRODUCTION AND STORAGE EVALUATION <br />Design Requirements <br />The City is served by five production wells, with a sixth well currently in production. It is recommended <br />that the capacity of the production wells with the largest well out of service be equal to or greater than <br />the maximum day demand. The City also has two elevated storage tanks. Storage tank capacity should <br />be equal to the average day demand plus an additional volume for firefighting. <br />Existing System <br />Production <br />The City currently utilizes wells to withdraw ground water for water supply purposes. Ten States <br />Standards recommends that maximum day water demand is accommodated with the largest well pump <br />out of service (designated as firm capacity). The City currently has five production wells, with Well No. 6 <br />in construction. It is recommended that wells be able to supply the peak day demand at firm capacity. <br />The City's peak day demand from 2013 to 2015 was, on average, 2,750 gallons per minute (3.9 MGD). A <br />summary of the production capacity is shown in Table 1. <br />Table 1: Lino Lakes Production Capacity <br />Well <br />1 <br />Flow (gpm) <br />675 <br />Flow .. <br />972,000 <br />2 <br />625 <br />900,000 <br />3 <br />1,200 <br />1,728,000 <br />4 <br />750 <br />1,080,000 <br />5 <br />1,100 <br />1,584,000 <br />6* <br />1,200 <br />1,728,000 <br />Total Flow* <br />5,550 <br />7,992,000 <br />Firm Capacity* <br />4,350 <br />6,264,000 <br />Peak Day Demand <br />2,750 <br />3,960,000 <br />Remaining Capacity (Firm Capacity minus Peak Day <br />Demand) <br />1,600 <br />2,304,000 <br />*Well 6 is under construction —flow rates are estimates based on preliminary pumping tests <br />Storage <br />The City of Lino Lakes currently utilizes elevated water towers for water storage. There are a number of <br />published design recommendations for water storage. The American Water Works Association <br />recommends that system storage equal the average day demand with a "reasonable" fire -fighting <br />reserve. The fire -fighting reserve varies from city to city. For this report, it was assumed that the City <br />should be able to supply 1,750 gpm for 3 hours. This is consistent with ISO's recommendation for a <br />system serving primarily built-up residential to light commercial. From 2011 to 2015, the City's average <br />day demand was 1.39 MG. Table 2 outlines the City's storage capacity. <br />Equal Opportunity Employer <br />wsbeng.com <br />K:\02029-520\Adm1n\Docs\Water System\Appendix B - System Capacity.docx <br />