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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 />D. <br /> <br />DESCRIPTION OF OMID FACILITIES <br /> <br />1. Diversion and Conv~ance Facilities, <br /> <br />Figure II-B shows the irrigation water distribution system in the upper Grand <br />Valley. The upstream diversion and conveyance facilities are shared with <br />several other water users, Water for project use is diverted from the <br />Colorado River (along with the water rights of the other users) into the <br />Government Highline Canal at the Grand Valley Diversion Dam about 8 miles <br />upstream from Palisade. The canal has a diversion capacity of 1,675 cfs and <br />extends westward, on the north side of the Colorado River, for about 54 <br />miles. About 4.6 miles below the main diversion, water is diverted from the <br />canal to the Orchard Mesa Power Canal through a siphon under the Colorado <br />River. <br /> <br />2, OMID Supply and Pumping Facilities <br /> <br />OMID's water supply system consists of the Orchard Mesa Power Canal and <br />the Orchard Mesa Pumping Plant. <br /> <br />The Orchard Mesa Power Canal, with a capacity of 860 cfs, is the supply <br />canal carrying water to the pumping plant and the adjacent Grand Valley <br />Power Plant (hydro-electric), The canal extends about 3.5 miles along the <br />east side of the Colorado River to terminate about 1 mile south of Palisade at <br />the Grand Valley Power Plant and the Orchard Mesa Pumping Plat. Through <br />this reach it delivers irrigation water to approximately 560 acres of land, <br />utilizing 14 independently owned and operated laterals, The Grand Valley <br />Power Plant was constructed by the United States with funds advanced by the <br />Public Service Company of Colorado. It is operated by Public Service Co. of <br />Colorado, under a nominal head of 75 feet and a flow of 400 cfs, and has a <br />capacity of 3,000 kilowatts. <br /> <br />The Orchard Mesa Pumping Plant contains four direct-connected, water- <br />powered, turbine driven pumps. Under normal conditions, 272 cfs is used to <br />pump 172 cfs to the upper canals (444 cfs total). Water drops 74 ft. from <br />the forebay of the Power Canal through penstocks to the turbine pumps, On <br />the low lift units, the turbines lift 100 cfs a net height of 41 feet to the <br />Orchard Mesa Canal No, 1. The high lift turbines pump 72 cfs 130 feet <br />higher to Orchard Mesa Canal No.2. The pumps were replaced with new <br />units in 1984. <br /> <br />II-7 <br />