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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Estimated storage capacity, delivery capacity of the system, along with our opinion of probable <br />design and construction costs, and our opinion of probable project budget costs are given in the <br />following table: <br /> <br />Alternate A: Enlarge Crescent Lake, Install New Raw Water Transmission Line, and <br />Upgrade the Existing Water Treatment Plant <br /> <br />Storage (acre-ft) Output (gpm) Components Costs $/acre-ft <br /> Mechanical: <br /> -new pump station $145,000 <br /> -pipeline to exist. WTP $235,000 <br /> -surge tank $ 80,000 <br /> -expand WTP with 2nd train $205,000 <br /> - provide three-phase power $ 25,000 <br /> to WTP <br /> -rehabilitation of diversion $ 20,000 <br /> structurelfill line <br /> Earthwork/Dam: $495,000 <br />18 50 Total: $1,205,000 $66,900 <br /> <br />Alternate B: Enlarge Crescent Lake and Build a New Water Treatment Plant <br />A new water treatment plant utilizing one microfiltration unit would be built adjacent to the combined <br />Crescent Lake/Powelson Reservoir. The reservoir and transfer line running to the new treatment <br />plant would be as described in A1temate A. The existing water treatment plant would remain <br />available to be placed on-line as needed to provide service reliability. The new wet well and piping <br />would be designed so that it could gravity fill from the reservoir. <br /> <br />The micro-filtration plant now used at Pinewood Springs is rated at 32 gpm. Thus, the design <br />capacity could be achieved by using two 32 gpm units or one 64 gpm unit. The total cost of the <br />larger unit will be less than that of two of the smaller units. The new water treatment plant was <br />conceptually designed to provide a total capacity of about 64 gpm at the District's direction. <br /> <br />The plan presented by the District envisions a treatment capacity of about 50 gpm. An advantage of <br />this altemative is that the District could operate both water treatment plants to meet the design <br />criteria of 50 gpm for service and provide an additional 32 gpm to fill treated water storage tanks. <br />The major disadvantage of this altemative is that the District will maintain and operate two plants. <br />remote from one another, at some additional cost. <br /> <br />4 <br />