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part--I Summary it f ~ , g , Repayment of the _power obligation would be accomplished by integrating the power function with the P-SMBP power system, the powerplant operating as a component of the Western Power Division. Under this arrangement, the power obligation would be repaid in the first two years of operation. There- after, the power revenues would be used to assist with repayment of the remaining features of the Pick-Sloan Missouri Basin Program. Annual benefits from all functions would total $19,669,500. Listed by functions they are: M&I water, $5,401,000; power, $2,787,000; recreation, $9,490,000; fish and wildlife, $503,500; and flood control, $1,488,000. Based on a 100-year period of analysis at 5-1/8 percent interest, the estimated annual benefits exceed the annual eqUivalent costs by a ratio of 1.57 to 1.00. This ratio is based on direct benefits only. EN~RONMENTALIMPACT An evaluation of the project's environmental impact is currently in progress by an independent consultant. Data and conclusions concerning the environmental impact are being assembled and therefore are not discussed in this report. ACKNOWLEDGMENTS The Federal agencies that made cooperative investigations and contributed.,to the plan formulation are the Forest Service, the Corps of Engineers,W1,e Bureau of Sport Fisheries and Wildlife, and the Federal Water PollUtion Control Administration. Summary statements of their investigations are appended as part of this report. Other Federal agencies that contributed information for use in the investigations include the Bureau of Mines and the Geological Survey. i i I , , /' I State and local agencies that furnished information and took an active interest in the investigations are the Colorado Water Conservation Board, city of Aurora, and the Denver Board of Water Commissioners. 1.3