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<br />PREFACE <br />The Endangered Species Act of 1973 (Public Law 93-205) requires federal <br />agencies to consider the needs of listed species, consult with the U.S. Fish <br />and Wildlife Service (USFWS), and obtain biological opinions concerning <br />potential effects of projects involving listed species. Due to continuing <br />water resource development in the Green River basin, the USFWS and Bureau of <br />Reclamation (BR), in cooperation with the states of Colorado and Utah, <br />investigated habitat needs of Colorado River rare and endangered fishes from <br />1979 to 1985. Government reports summarizing results of these efforts (e.g., <br />Miller et al. 1982abc, Tyus et al. 1987) suggested that flows from Flaming <br />Gorge Dam were adversely affecting habitats of the listed species. In 1986, BR <br />and USFWS initiated the Flaming Gorge Study (Interagency Agreement 6-AA-49- <br />04070), a project involving government and private researchers under the <br />direction of the BR Biological Studies office in Salt Lake City, and the FWS <br />Colorado River Fishes Project station in Vernal, Utah. <br />This report summarizes existing information on distribution, abundance, <br />and life history needs of the endangered fishes. The Flaming Gorge Study <br />reports are summarized and referenced herein, and recommendations for flow and <br />other management activities are provided. Copies of all reports may be <br />obtained from individual investigators whose addresses are provided in the <br />Appendix. Further information about the rare and endangered Colorado River <br />Fishes can be obtained from the Colorado River Coordinator, U.S. Fish and <br />Wildlife Service, P.O. Box 25486 Denver Federal Center, Denver, Colorado <br />80225. Information about BR programs and the operation of Flaming Gorge Dam <br />can be obtained from the Regional Director, Bureau of Reclamation, P.O. Box <br />11668, Salt Lake City, Utah 84147. <br />L <br />