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<br />The Green River Watershed <br /> <br />The watershed of the Green River, a fifth order stream located in southwest <br />Wyoming, northwest Colorado, and northeastern Utah, encompasses about <br />44,700 miz (Andrews 1986). The river flows through a semiarid region <br />typically of rolling hills and deeply incised canyons (Annear and Neuhold <br />1983). Andrews (1986) described some hydrologic features of the Green River, <br />especially streambed degradation and aggradation, that resulted from altered <br />riverflow and sedimentation regimes that occurred after operation of Flaming <br />Gorge Dam in 1962. Riverflow manipulation as required for power generation at <br />Flaming Gorge Dam altered downstream riverine conditions from warm and turbid <br />with native cyprinids to one with tailwaters of the dam more suited for <br />salmonids (Stanford and Ward 1986). Below the Yampa River confluence, <br />conditions more closely resemble historic conditions, and this area does <br />provide habitat for sparse populations of endangered fish species. Annear and <br />Neuhold (1983) described some limnological conditions in the Green River from <br />Flaming Gorge Dam to a site near Jensen. Cooke and Ahern (1985) discussed <br />potential water quality problems, particularly salinity issues, as they relate <br />to expected future development of the Green River water resources. <br /> <br />11 <br />