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<br />" <br /> <br />sections. A water diversion structure would be constructed on each <br /> <br />creek and a short collection branch pipeline would be used to connect <br /> <br />the diversion structure to the main conveyance pipeline. <br /> <br />New Safe Yield <br /> <br />The average annual diversion from the collection system would be <br />about 69,000 acre-feet. The safe annual yield of 59,000 acre-feet <br />would be firm only if a new East Slope storsge reservoir snd West Slope <br />storage and replacement water were available. If only a new ~est Slope <br />storage reservoir were available, the safe annual yield would be about <br />30,000 acre-feet. If only an East Slope storage reservoir were avail- <br />able, the safe annual yield would be about 20,000 acre-feet. If <br />neither West Slope nor East Slope storage reservoirs were available, <br />the safe annual yield would be zero. <br /> <br />Cost of Project <br />The capital construction cost of the project, including interest <br />during conatruction, would be approximately $399 million with East and <br />West Slope storage. The capital cost per acre-foot of safe yield would <br />be $6,800. The snnualized capital cost (usIng SO years at 8 percent <br />interest) would be $23 million. Including $125,000 for annual opers- <br />tion and maintenance costs, the annualized cost per acre-foot of safe <br />yield would be approximately $600. Mitigation would add approximately <br />$20 to $32 million to the total project cost. <br /> <br />Significant Impacta <br /> <br /> <br />Construction and operation of the East Gore collection system <br /> <br /> <br />would generate significant short-term and long-term impacts. Signifi- <br /> <br /> <br />cant impacts would occur to water quality, aquatic life, wetlands and <br /> <br />riparian areas, soils, wildlife, visual resources, and recreation. <br /> <br />14 <br />