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<br /> <br /> <br />Water Storage Siting Study <br />City of Lino Lakes <br />WSB Project No. 2988-44 Page 2 <br />1. EXECUTIVE SUMMARY <br /> <br />The City of Lino Lakes requested that WSB perform a water storage siting study based on <br />recommendations that the City construct additional water storage capacity to meet water demands and <br />fire fighting requirements. For the study, tank size, type, location, and the hydraulic impact on the <br />distribution system were evaluated. To determine tank size, the following parameters were considered: <br /> <br />• Population projections <br />• Water use data <br />• Existing storage and production capacity <br />• Fire fighting needs <br /> <br />Based on the analysis, WSB recommends the City construct a 1.5 million gallon reservoir to serve the <br />existing and future development. After determining the recommended volume, three types of storage <br />tanks were evaluated: 1) fluted column elevated tower; 2) composite elevated tower; and 3) ground <br />storage reservoir. The capital costs, operations and maintenance costs, and 50-year life-cycle costs were <br />calculated and the results are shown below. The cost analysis shows that over time, a composite style <br />water tower will be the most cost effective option. <br /> <br />Option Estimated Capital <br />Cost Including <br />Engineering, Bidding, <br />and Construction <br />Services <br />Estimated 50 Year <br />Operation and <br />Maintenance Cost <br />Total Capital and <br />O&M Cost <br />Concrete Ground Storage <br />Reservoir and Booster <br />Station <br />$6,059,248 $902,000 $6,961,248 <br />Fluted Column Style Water <br />Tower <br />$4,301,250 $3,600,000 $7,901,250 <br />Composite Style Water <br />Tower <br />$4,069,350 $2,112,000 $6,181,350 <br /> <br />Five potential water tower sites were discussed with City staff and selected for further consideration. Each <br />site was modeled using Bentley WaterCAD software to analyze how multiple elevated tanks in various <br />locations of the City would balance with each other and impact the water distribution system. Because the <br />five locations were all centrally located within the water distribution system and were located near the well <br />field, modeling results did not vary significantly between the various locations. The phasing of future <br />development, as well as property ownership, will have a greater impact on location feasibility. It is <br />recommended that the sites deemed most feasible undergo a geotechnical evaluation with soil borings <br />prior to site acquisition and preliminary design to determine if any above-and-beyond structural <br />requirements (ex. structural pilings) would be necessary and would therefore impact the overall cost of <br />the project.