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DRAFT 8 -17-07 <br />V. FUTURE WATER STORAGE NEEDS AND OPTIONS <br />There are generally two types of treated water storage that can be considered in a <br />municipal water supply. Elevated tanks are one option. The City of Lino Lakes currently <br />has two elevated tanks. A second option is ground storage. Ground storage works well <br />near a water treatment plant and operates as a clearwell to receive the treated water. High <br />service pumps transfer water from the clearwell reservoir to the elevated tanks as needed. <br />Ground storage is less costly to build and to maintain than an elevated storage tower and <br />is recommended. <br />The City of Lino Lakes currently has 2.0 million gallons (MG) of elevated water storage <br />available to the system. In reviewing the April 2004 Comprehensive Water System Plan as <br />prepared by TKDA, the plan calls for two additional 0.5 MG gallon ground storage <br />reservoirs at the proposed two treatment plant sites. The needed storage in 2030 is shown <br />as 2,576 MG. The ultimate needed storage based on the ultimate population calculation is <br />3.3 MG. In addition, as the City grows, and as conservation measures are implemented, <br />consumption patterns may change, and the peaking equalization needs may be reduced. <br />However, based on the Ten States Standards storage guidelines, the recommended <br />storage is equal to average day usage which is projected to be 4 MG at ultimate <br />population. <br />Therefore, we are recommending a single treatment plant with a single finished -water <br />ground service reservoir of 1.5 MG. The cost for a 2 MG reservoir is also shown. This will <br />bring the City's total storage to 3.5 or 4 MG. A larger reservoir will provide more flexibility <br />and may delay the need for wells. An alternate would be to build a 1 MG reservoir first and <br />a second 1 MG reservoir later on the same site. <br />Water Treatment Plant Study 7 13843.000 <br />