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► <br />4.9.1 Stream Flow <br />Potential changes in stream flow will be determined for each selected alternative. We propose to <br />develop daily hydrographs for representative dry, average and wet years at the following sites of <br />interest: <br />• Colorado River below Kremmling <br />• Colorado River above Cameo <br />• Blue River below Green Mountain Reservoir <br />• Eagle River below Wolcott Reservoir <br />• Fryingpan River below Ruedi Reservoir <br />• Roaring Fork River downstream of Carbondale <br />� Crystal River below Thompson Creek (Yank Ck Reservoir) <br />• Lower Roan Creek <br />• Plateau Creek below Buzzard Creek Reservoir <br />The hydrographs will be developed from the hydrologic models previously discussed, and will be <br />utilized in the environmental evaluations. We propose to illustrate stream flow for a status quo scenario <br />and a 10825 scenario. <br />4.9.2 Fisheries and Recreation <br />The affect of stream flow changes on aquatic habitat, fisheries, and recreation will be evaluated. Five <br />key stream reaches are important to investigate: <br />1. Colorado River below Kremmling <br />2. Eagle River below Wolcott <br />3. Fryingpan River below Ruedi <br />4. Roaring Fork River below Basalt <br />5. Crystal River below Thompson Creek <br />The exact scope of this portion of the study is difficult to determine prior to the review of available <br />information and prior to the quantification of the magnitude of potential changes in stream flow. An <br />aquatic habitat expert with experience in the above stream reaches will be added to the Study Team. <br />Input from the Steering Committee will be secured prior to the selection of an aquatic biologist. <br />4.9.3 Water Quality <br />Several 10825 alternatives could affect the water quality of the lower Colorado River in the Grand <br />Valley, or the quality of water in the vicinity of other project facilities. Within the Grand Valley, <br />potential changes in total dissolved solids and selenium are of particular concern. Changes in water <br />temperature and sedimentation may be of importance within the upper portions of the Colorado River <br />basin. <br />10825 Phase 2 Scope of Work Revised May 25, 2007 per CWCB request Page �$ <br />