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<br />. <br />Estimated Costs <br /> <br />. <br />(January, <br /> <br />. <br /> <br />1974 prices) <br /> <br />Total Cost <br /> <br />$51,984,000 <br />575,000 <br />1,721,000 <br />762,000 <br />928,000 <br />$55,970,000 <br /> <br />!' <br />00 <br />..-( <br />..~ <br /> <br />Irrigation <br />Settlement <br />Fish and wildlife enhancement <br />Recreation <br />Flood control <br /> <br />Water allocations <br /> <br />Colorado <br />Wyoming <br /> <br />29,100 a.f. <br />22,400 a.f. <br /> <br />51,500 a.f. <br /> <br />15,000 a.f. <br /> <br />3.9 mg/l <br /> <br />Total <br /> <br />Annual depletion of the Colorado River (Colorado) <br /> <br />Annual salinity increase to Colorado River <br />at Imperial Dam <br /> <br />Benefit-cost ratio <br /> <br />Total Annual benefits <br /> <br />1. 72 to 1 <br />$ 3,593,800 <br /> <br />Environmental Impact <br /> <br />a. Mitigation of the losses of big game range resulting from new <br />irrigation in Wyoming has not been resolved. <br /> <br />b. Loss of big game range in Colorado has been established and <br />will be mitigated by land purchase. <br /> <br />c. Big game access across canals is a significant problem that <br />was resolved by including big game crossings. <br /> <br />d. Salt loading from project irrigation will result in 1.2mg/l <br />increase in salinity in the Lower Colorado River at Imperial Dam, while <br />concentration due to stream depletion will increase the salinity at <br />that point by 2.7 mg/l. <br /> <br />Topographic mapping of the project area was initiated in F.Y. 1965 <br />with funds contributed by local interests. Advance planning studies <br />were initiated with federal funds in F.Y. 1966 and the definite plan <br />report was completed in January, 1972. <br /> <br />Negotiations with the Little Snake River Water Conservancy District <br />in Wyoming and the Pot Hook Water Conservancy District in Colorado on <br />the project repayment contract have been initiated. A draft of this <br />contract has been approved as to form by both districts and should be <br />executed soon. <br /> <br />The draft environmental statement is being revised after considera- <br />tion of the comments received. The final environmental statement is <br /> <br />-2- <br />