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I I I I I I I I I I I I I I I I I I I non!" ~ The Water Development Baseline and project configurations used in this study are specified for study purposes only and shall not constitute a statement by any party on compact or water right entitlements, or on the acceptability of the Interim Flow Recommendations. Any assumptions that reservoir projects will not be developed under the subject water rights shall also not constitute a statement by any party that the subject water rights will be abandoned. 1.2 PURPOSE AND SCOPE OF WORK The purpose of this study is to quantify the downstream flow impacts which might be expected if the reservoir projects under the P&M and CRWCD water rights were developed. The projects proposed by P&M are Three Forks Reservoir and Sheep Mountain Reservoir. CRWCD projects include the Pot Hook Project and the Powder Wash Project. If the findings of this study indicate that development of the P&M water rights would have a significant (as determined by the U.S. Fish and Wildlife Service) flow impact on the habitat of the endangered fish in the Yampa River, the present market value of these water rights will be appraised. At the request of the CRWCD, the present market value of the CRWCD water rights will not be appraised in this study. The computer model to be used for this study will be the proprietary State of Wyoming WIRSOS (Wyoming Integrated River System Operation Study). With WIRSOS, Little Snake River flows at Lily, Colorado over the 1930-1982 period will be determined assuming various staged project configurations of the subject water rights. These flows will 2