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Last modified
7/14/2009 5:02:35 PM
Creation date
5/20/2009 10:09:36 AM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
9432
Author
Modde, T. and M. Fuller.
Title
Feasibility of Channel Catfish Reduction in the Lower Yampa River.
USFW Year
2002.
USFW - Doc Type
Vernal.
Copyright Material
NO
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Reconnecting fragmented river reaches is an important component of the RIP <br />for the Endangered Fishes of the Upper Colorado River Basin (Wydoski and Hamill <br />1991). Redlands Dam on the Gunnison River was selected as the site where the <br />first fish passageway in the Upper Colorado River Basin would be constructed <br />under the RIP (U. S. Bureau of Reclamation [BR] and FWS 1995). Seven different <br />options for providing fish passage at the Redlands Diversion Dam were initially <br />explored in 1992 (Appendix B). The purpose for construction of a fish passageway <br />at the Redlands Diversion Dam was two-fold. The first purpose was to allow sub- <br />adult and adult Colorado pikeminnow and razorback sucker and other large-bodied <br />native fish (> 100 mm) to move upstream past the dam. Second, the trap would <br />allow problematic nonnative fish that prey on or compete with the Colorado <br />pikeminnow and razorback sucker to be removed and prevent them from moving <br />upstream. <br />The fish passageway was completed in the spring of 1996 allowing fish to <br />move upstream of the dam for the first time in 80 years. The fish passageway <br />would allow native fish populations downstream of the diversion dam to re- <br />colonize and re-populate stream reaches upstream of the dam in the Gunnison <br />River, thus reconnecting fish populations between the Upper Colorado and Gunnison <br />rivers. Providing passage at Redlands Diversion Dam would potentially extend the <br />range of native fishes upstream about 50 miles into historical habitat and would <br />allow Colorado pikeminnow to naturally re-occupy upstream warmwater reaches in <br />the Gunnison River. Expanding the upstream range for the Colorado pikeminnow and <br />razorback sucker in the Gunnison River will assist recovery by providing <br />additional physical habitat and an abundant source of native and nonnative fishes <br />as prey for Colorado pikeminnow. <br />A 5-year memorandum of agreement among the BR, FWS, and Colorado Water <br />Conservation Board was finalized in August 1995 to furnish water from the <br />Aspinall Unit for the benefit of endangered fish in the Gunnison and Colorado <br />rivers (Contract No. 95-07-40-R1760). This interim contract was designed to <br />provide 300 cfs during "low-flow conditions" for certain months (July through <br />October) during all but the driest years in the 2.3-mile reach of the Lower <br />Gunnison River downstream of the Redlands Diversion Dam to the confluence of the <br />Colorado River. This 300 cfs minimum flow in the Lower Gunnison River is <br />especially important to maintain during the summer low-flow period (July- <br />September) so that endangered fish will be able to migrate to and from the fish <br />passageway (Burdick 1997). Moreover, this agreement is an important step because <br />it provides legal protection of flows in critical habitat that will protect and <br />enhance aquatic habitat to benefit endangered fish and will continue to be one <br />component of flow recommendations for the Gunnison River. This agreement expired <br />in 2000: negotiations in the spring of 2000 extended this agreement for an <br />additional 5 years. These negotiations are part of the Biological Opinion that <br />3
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