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Last modified
7/14/2009 5:02:29 PM
Creation date
5/17/2009 11:59:13 PM
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UCREFRP
UCREFRP Catalog Number
7281
Author
U.S. Fish and Wildlife Service.
Title
Recovery Implementation Program for Endangered Fish Species in the Upper Colorado River Basin, Environmental Assessment, November 1987.
USFW Year
1987.
USFW - Doc Type
Denver, Colorado.
Copyright Material
NO
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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
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