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Last modified
7/14/2009 5:02:31 PM
Creation date
5/20/2009 10:11:03 AM
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UCREFRP
UCREFRP Catalog Number
7747
Author
Burdick, B. D. and L. R. Kaeding.
Title
Biological Merits of Fish Passage as Part of Recovery of Colorado Squawfish in the Upper Colorado River Basin.
USFW Year
1990.
USFW - Doc Type
Grand Junction, CO.
Copyright Material
NO
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New projects that would further restrict the free movement of Colorado squawfish <br />continue to be proposed in occupied habitat. Recent projects include an existing, <br />unauthorized diversion dam by the Clifton Water District in the 15-mile reach of the <br />upper Colorado River, an existing diversion dam on the White River near Rio Blanco <br />Lake, and a proposed diversion dam by Colorado Ute Electric on the Yampa River <br />near Craig, Colorado. <br />Because no passageways have yet been constructed, the feasibility or benefits to <br />Colorado squawfish recovery of providing fish passage around existing movement <br />barriers can only be speculated upon. The objective of the present report is to <br />provide a foundation for discussion of the fish-passageway issue, to identify situations <br />in which such structures may be useful to recovery of the species, to identify important <br />areas of informational need, and to recommend further actions. This information <br />should be useful to the Section 7 consultation process, especially when the provision <br />of fish passage is being considered to offset project impacts, and to the development <br />of management activities as part of the recovery process. As the recovery goals for <br />Colorado squawfish become more concisely defined, the criteria used in this report <br />may need to be amended. <br />FISH-PASSAGE METHODS AND CONCERNS <br />There are two general means by which fish may be passed around movement <br />barriers, active and passive transport (Evans and Johnston 1980; Bell 1986). With <br />4
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