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N N <br />The historic flow of the Colorado River at Cameo, enhanced by enforcement <br />of the winter season call of a 100% non-consumptive water right at Shoshone, has <br />always been sufficient to meet the winter power demands of the Grand Valley <br />Project. When the Grand Valley water users can no longer count on the Shoshone <br />call to provide the full 1,250 cfs to the Colorado River at Shoshone, the power <br />demand at Cameo will become the controlling senior water right during the <br />winter. Water from the Roaring Fork and other tributaries downstream from <br />Shoshone will make up a higher percentage of the total flow at Cameo than has <br />been the case in the past. <br />More frequent enforcement of the Cameo call will have impacts on <br />diversions in the Roaring Fork River and its tributaries, including the <br />Fryingpan-Arkansas Project and Ruedi Reservoir. Holders of conditional water <br />rights for industrial use have probably been relying on the Shoshone call to keep <br />water in the Colorado River during the critical winter low flow period and now <br />will expect to issue a junior call (when the rights are developed) which might <br />further impact. the Roaring Fork River. <br />During August, September, and October of most years (and April in years <br />when the snowmelt runoff is delayed), releases from Green Mountain Reservoir are <br />made which serve to keep the Cameo irrigation demand from issuing its senior call <br />(see attached graph). In preventing such a senior call, water stored in Green <br />Mountain Reservoir protects the water supplies of thousands of West Slope water <br />users. Transmountain diversions are not permitted to benefit from such releases, <br />since the water used is dedicated to serving municipal and agricultural water <br />6