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1059 RUEDI DAM AND RESERVOIR, COLO. 19 .' eastern and western slope llgi"eement Oil project openitiollS and pro- vided various mensures for the protection of rights and interests of the people on both slopes in Colorado. The principles also recog- nized Aspen Dam and Reservoir of 28,000 acre-feet storage capacity as an essential feature of the Fryingpan-Arkansas project plan. That reservoir was to furnish water required for protection of western Colorado water users in accordance with provisions of section 1, chapter 192, Colorado Session Laws, 1943, reading as follows: Provided. however, That any works or facilities plnnned aod (Iesigned for the exportatIon ot. water from the Dutural basin of the Colorado River and Its tributaries in Colorado, by any district created under this cbapter, Sblill be subject to the provisions of the Colorado River Compllet and the Boulder Canyon Project Ad, as amended; that any sueh works or facilities sball be designed. constructed and operated in such a manner that the present appropriations of water, and in addition thereto prospective uses of water for irrigation and other beneficial consumptive-use purposes, including consumptive uses tor domes- tic, mining and Industrial purposes, within the natural basin of the Colorado River in the State of Colorado, from which water is exported, will not be im- paired nor increased in cost at the expense of the water users within the said naturnl basin; and that tbe facilities und other meaDS for the accomplishment of said purpose shall he Incorporated In, and made a part of, any project plnns for the exportation of water from said natural basin In Colorado. Although the original operating princi pIes were intended to achieve full agreement on all aspects of the Fryingpan-Arkansas project within the State, it became appa.rent during congressional hearings that western slope interests objected to the. project plan, particularly concerning Aspen Dam and Reservoir. As" result, in 1958 the Colo- rado 'Yater Conservation BOllrd iIlstigated consideration of a sub- stitute replacement reservoir for the Aspen feature. The board re- q'itested the Bureau of Reclamation to undertake such studies and con- tributed funds lUld personnel to finance and assist in the investiga- tions. Various alternative reservoir sites were considered. All of them except the Ruedi site were rejected because of geologic, water supply, or other limitatious. The Bureau of Reclamation had previously made preliminary in- vestigations of the Ruedi site as an alternative for the Aspen site and as a potential feature of the now obsolete Blue-South Platte project investigation. Cousiderable engineering and hydrologic data """,-aTmlllblll-on-the -1tuedi-site1'rmnthese ellrlter stua~ The geology and water supply conditions at the Rlledi site permit the development of a larger reservoir than was contemplated above Aspen; hence, the plan for Rlledi provides for a reservoir of approxi- mately 100,000 acre-feet of storage capacity as contrasted with 28,000 acre-feet in Aspen Dam and Reservoir. Ruedi Reservoir, therefore, will not only meet the replacement requirements of the Fryingpan- Arkansas project but. will provide an additional regulated water supply for other uses on t.he western slope. Following selection of the Ruedi site, the Colorado 'Vater Con- senat.ion Board reconstituted a policy and review comlllitt~ for the Fryingpan-Arkansas project 011 January H, 1959. The committee consisted of representnti,'es of the Colorado \\'ater Conservation Board, the Colorado River .Water Conserntion District., the South- easterll Colorado Water Conservanc.y District, and the Colorado Game ilnd Fish COllunission. The revise(t operating principles were com. \, oJ