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Table ES-1 (Continued) <br />Impact Findings of Environmental Assessment <br />Executive Sumiaryl/ <br />M <br />N <br />Irrpacts of the <br />Potentially Affected Resource Impacts of the Proposed Action "No Action" Alternative <br />D. Nonnative Fishes (with <br />emphasis on sport fish) <br />E. Terrestrial Biological Resources <br />1. Waterfowl habitat <br />Coldwater fish: The Proposed Action has the <br />potential to benefit or adversely impact <br />coldwater fishes in tailwaters as a result <br />of changes in dam releases. Ruedi releases <br />are expected to cause some loss of brown <br />trout spawning habitat, but the remaining <br />habitat is still greater than the amount <br />necessary to sustain a quality trout popu- <br />lation. Flaming Gorge summer releases should <br />benefit the tailwater trout fishery, but <br />enhanced auturrn/winter releases might result <br />in a negative irrpact. Aspinall August-September <br />releases in dry years should benefit the trout <br />fishery downstream. <br />Warmwater fish: The program could have an <br />adverse impact on nonnative fishes identi- <br />fied as "problem" species, i.e., nonnative <br />species known to prey on or compete with <br />the rare and endangered fishes. The degree <br />of impact would depend on the control method <br />used, the species involved, and the intensity <br />of the control effort. However, impacts are <br />not expected to be major. <br />The assumed flow releases from Flaming Gorge <br />will not affect waterfowl nesting in the <br />spring. Increased autumn flows will benefit <br />migrating waterfowl. Reduced surrmer flows <br />from Flaming Gorge will likely result in <br />increased pumping costs at waterfowl manage- <br />ment areas in average to wet years. <br />Coldwater fish: Same as Proposed Action. <br />Wamwater fish: Similar to Proposed Action, i.e., <br />this alternative could adversely impact problem <br />wanmwater nonnative fish. However, adverse impacts <br />to problem wannwater fish would occur more gradu- <br />ally than under the Proposed Action. <br />Same as Proposed Action. <br />m <br />x <br />m <br />n <br />c <br />C <br />m <br />N <br />c <br />3 <br />3 <br />n <br />M M M M M MM M M M? MM I= M? MM M