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<br />l <br /> <br />larval Colorado squawfish were collected in this reach in 1992 <br />(Anderson 1994). Six larval Colorado squawfish were collected in 1995 <br />and eight in 1996 (Personal communication, Richard Anderson). In 1995, <br />five were captured upstream of Redlands. two at RM 5.2 and three at RM <br />29.3. The one downstream specimen was collected at RM 2.6. In 1996, <br />one was captured at RM 29.3. four at RM 5.2, and three at RM 2.6. <br /> <br />The fish passageway at Redlands Diversion Darn was designed and <br />constructed to pass both juvenile and adult Colorado squawfish and <br />razorback sucker. Construction of the fish passageway at the Redlands <br />Diversion Darn was completed in June 1996. The fish passageway was a <br />joint effort of the U. S. Bureau of Reclamation (BR) with biological <br />and technical guidance from the U. S. Fish and Wildlife Service <br />(Service), the State of Colorado, and Redlands Water and Power Company. <br />It was operational from 24 June to 25 October 1996. The fish <br />passageway was winterized in early-November 1996 and was operational <br />again in late March of 1997. <br /> <br />) <br /> <br />The overall goal is to evaluate whether sub-adult and adult Colorado <br />squawfish and razorback sucker will use a passageway. This passageway <br />was constructed as an experimental facility to determine the utility of <br />using fish. passage as a recovery tool for these species at other <br />instream barriers in the Upper Colorado River Basin. Specific <br />objectives are to determine 1) the use of the fish passageway <br />seasonally by all native and nonnative fishes and 2) the extent of <br />movement of sub-adult and adult Colorado squawfish in the fish <br />passageway, in the plunge pool, and in the 2.3.mile reach downstream of <br />the diversion darn using radiotelemetry. <br /> <br />The fish passageway will extend the range of these two native fishes <br />upstream about 50 miles into historical habitat and may allow Colorado <br />squawfish to naturally re.colonize these upstream reaches. The <br />Gunnison River. upstream of the Redlands Diversion Darn, supports a <br />predominantly native fish community (79%), primarily juvenile and adult <br />bluehead sucker, flannelmouth sucker, roundtail chub, and speckled dace <br />(Burdick 1995). These native fish, historically preferred prey of the <br />piscivorous Colorado squawfish, would provide a substantial food <br />source. <br /> <br />A fish trapping facility located at the upper end or forebay of the <br />fishway allows researchers to sort. examine, and count fish and remove <br />nonnative fish from the system. The fishway has baffles that can be <br /> <br />Redlands 3 <br />