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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