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<br />-i <br />(V) <br />'" <br />-I <br /> <br />CRAPI'ER V <br /> <br />ALTERNATIVES STUDIED <br />(Tomichi Creek Unit) <br /> <br />Elko Dam would be a rolled earthfill strueture with a volume of <br />l,3l2,600 cubic yards. The dam would rise ll7 feet above streambed and, <br />at crest elevation 8,377 feet, it would be 30 feet wide and l,200 feet <br />long. The spillway from the reservoir would be an open chute on the <br />right abutment of the dam. With the reservoir at maximum water elevation <br />8,37l.2 feet, the spillway would have a capacity of _l2,lOO cubic feet per <br />second. The outlet works, in the left abutment, would have a capacity of <br />240 cubic feet per second with the reservoir at maximum water surface <br />level. The spillway and outlet works would diseharge into separate stil- <br />ling basins. Details of the dam design are shown on the following page. <br /> <br /> <br />~~.~ <br /> <br />An aerial view of Elko Reservoir site with sketch of potential <br />dam and high water line. <br /> <br />Seepage losses from the reservoir would be negligible. The Precam- <br />brian granite formation which underlies the area is relatively impervious <br />and a cutoff trench would prevent seepage through the gravels in the <br />stream bottom. <br /> <br />42 <br />