Laserfiche WebLink
<br />V. Relationship to RIPRAP: <br />COLORADO RIVER ACTION PLAN: GUNNISON RIVER <br />II.B. I, Restore passage at Redlands, <br />II.B, I .c, Operate and maintain fish ladder. <br />II.B. I,d. Monitor and evaluate success, <br /> <br />VI. Accomplishment ofFY 2002 Tasks and DeliverabJes, Discussion ofInitial Findings and <br />Shortcomings: <br /> <br />A Tasks and Deliverables <br /> <br />Task I. Routine 0 & M of the fish ladder and fish trap which includes monitoring, <br />sorting, enumerating all fish in addition to cleaning trash and debris from trash racks, bar <br />screens, fish trap, and fishway entrance. Task completed, <br /> <br />Task 2. Compile, computerize, and summarize fish use data; prepare annual progress <br />report, Task completed. <br /> <br />B, 2002 Highlights <br /> <br />Seven adult Colorado pikeminnow were collected in the fish trap of the fish passageway <br />at the Redlands Diversion Darn during 2002 (Appendix; Table I). This included a 16.8-pound <br />female Colorado pikeminnow, which is the largest pikeminnow to ever ascend the fish ladder in <br />the seven years that the ladder has been operated and monitored, All pikeminnow used the <br />flshway in July, which is similar to the seasonal use patterns for this species in former years, <br />1996-2001. This brings the total number of Colorado pikeminnow that have been captured in the <br />fish trap at the passageway of the Redlands Darn to 59 from 1996 through 2002. <br /> <br />Only one razorback sucker was found in the fish trap during July 2002 (Appendix; Table <br />2), This fish had previously been stocked in the Gunnison River at Delta in September 1997 and <br />had been at-large about 4.2 years before being captured in the fish trap. This brings the total <br />number of razorback sucker that have been captured in the fish trap at the passageway of the <br />Redlands Dam to six, <br /> <br />Four thousand, four hundred fifty four fish were trapped and counted in the trap of the <br />Redlands Diversion Dam fish way berween 1 April and 9 October 2002, The fish ladder was <br />voluntarily closed for 17 days between 22 April through 9 May 2002 to conserve water. The <br />total number of all fishes that used the fish ladder in 2002 was less than the annual catches of the <br />previous five years (1996: 8,375; 1997: 12,233; 1998: 7,589; 1999: 8,264; 2000: 6,662; 2001: <br />6,317 (Appendix; Table 3)), Native fishes comprised 66% of the total number of fishes collected <br />in 2002, compared to 94% in 1996 and 1997, 93% in 1998 and 1999, 92% in 2000, and 83% in <br />200 I. This marks the second consecutive year that the relative percentage of native fishes has <br />declined in the 7 years that the ladder has been operated and monitored (Appendix; Table 3). <br /> <br />Bluehead sucker comprised 30% of the catch and flannelmouth sucker 19%, The numbers <br />of channel catfish (613) and green sunfish (256) that used the fish ladder in 2002 were the <br /> <br />redlands o&m C-4b Page 2 <br />