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<br />COLORADO RIVER RECOVERY PROGRAM <br />FY 97 ANNUAL PROJECT REPORT <br /> <br />RECOVERY PROGRAM <br />PROJECT NUMBERCAP-10 <br /> <br />I. Title: Yampa River Fish Passage <br /> <br />II. Principal Investigators: Tim Modde <br /> <br />III. project Summary: The purpose of this study was to <br />investigate the potential presence of barriers in Cross <br />Mountain Canyon and/or the Maybell Diversion to upstream <br />movement of Colorado squawfish during their upstream <br />postspawning migration. This study monitored the movement <br />of Adult Colorado squawfish from stationary telemetry <br />monitoring sites above Cross Mountain Canyon and above and <br />below the Maybell Diversion. Dates of movement past each <br />site were logged as fish passed downstream to spawning sites <br />and again upstream to areas occupied prior to spawning. <br /> <br />IV. Study Schedule: May 1, 1997 to September 30, 1997 <br /> <br />V. Relationship to RIPRAP: This study relates to the Green <br />River Action Plan Yampa River elements l.A.2., <br />l.A.4.a. (3). (a)., and 1.B.2. of identifying baseflow <br />discharge needs of endangered fishes in the Yampa River. <br /> <br />VI. Accomplishment of FY 97 Tasks and Deliverables of Initial <br />Findings and Shortcomings: Five adult Colorado squawfish <br />were implanted in the Yampa River between Juniper Canyon and <br />Morgan Gulch during the second week of May, 1997. In <br />addition, four adult Colorado squawfish implanted with 18 <br />month transmitters the previous year (by CDOW supervised <br />crews) occupied the Yampa River in the area between Juniper <br />Canyon and Maybell. Two stationary telemetry data logging <br />stations were established approximately 0.5 miles upstream <br />of Cross Mountain Canyon and immediately above the Maybell <br />Diversion on June 30 and July 4, respectively. Three fish <br />were observed to move downstream of the Maybell station in <br />July and four fish were monitored passing upstream of the <br />station in August. The same four fish were detected at the <br />Cross mountain station (four fish moving downstream in July <br />and all returning between July 31 and August 5). Fish did <br />not appear to be impeded during their postspawning <br />migration, however, the high flows observed in summer of <br />1997 precluded the opportunity to detect migrational <br />obstacles if they occur. <br />