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<br />3430 <br /> <br />Present water uses <br />Colorado's share of evaporation losses at <br />reservoirs of Colorado River Storage <br />project (51.75 percent) <br />Projects authorized or under construction <br />Potential developments <br /> <br />Average annual <br />depletion <br />(acre-feet) <br />1,7e6,000 <br /> <br />342,000 <br />166,000 <br />1,295,000 <br />3,5e9,000 <br /> <br />Projects Authorized or Under Construction <br /> <br />Silt <br /> <br />The Silt project is being constructed near the towns of Rifle and <br />Silt in west-central Colorado. By storage on Rifle Creek and pumping from <br />the Colorado River it will provide water for the irrigation of 6,597 acres <br />of land, including 2,118 acres not presently irrigated, 4,160 acres in need <br />of supplemental water, and 319 acres in need of a new source of water. It <br />will also provide benefits to fish and wildlife and recreation. The proj- <br />ect was one of the several participating projects authorized by the Colo- <br />rado River Storage Project Act of April 11, 1956. The Silt Water Conserv- <br />ancy District, organized in 1957, is the contracting and administrative <br />agency for the project. Project operation will deplete the flow of the <br />Colorado River by an average of 6,000 acre-feet annually. <br /> <br />Fryingpan-Arkansas <br /> <br />The primary purpose of the Fryingpan-Arkansas project authorized <br />July 16, 1962 (Public Law 87-590), and currently under construction, is <br />to divert water eastward through the Continental Divide from the Colorado <br />River Basin for multiple-purpose use in the Arkansas River Basin in Colo- <br />rado. The Ruedi Reservoir is included in the project to provide replace- <br />ment water for existing water uses and additional regulated water for new' <br />uses on the western slope. The new uses that will be supplied from the <br />Ruedi Reservoir are not fully determined, but it is assumed that 30,000 <br />acre-feet annually will be used for municipal and industrial purposes as- <br />sociated with oil shale. This use is estimated to deplete the Colorado <br />River by 6,000 acre-feet. Other new uses will likely be in connection <br />with potential downstream projects later discussed which account for ad- <br />ditional stream depletions. The transbasin diversion under the Fryingpan- <br />Arkansas project will deplete the flow of the Colorado River by an average <br />of 70,000 acre-feet annually. <br /> <br />Homestake <br /> <br />The Homestake project, a transbasin diversion, is being constructed <br />by non-Federal interests to divert water from Homestake Creek and other <br />sources in the Colorado River Basin for use in the vicinity of Pueblo and <br /> <br />2 <br />