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Rock Island and Rocky Reach Dams, 2001

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Rock Island and Rocky Reach Dams, 2001 MOVEMENT OF BULL TROUT WITHIN THE MID-COLUMBIA RIVER AND TRIBUTARIES, 2001-2002 Final ROCKY REACH HYDROELECTRIC PROJECT FERC Project No. 2145 November 20, 2002 Prepared by: BioAnalysts, Inc. Boise, Idaho Prepared for: Public Utility District No. 1 of Chelan County Wenatchee, Washington Movement of Bull Trout TABLE OF CONTENTS SECTION 1: INTRODUCTION........................................................................................ 1 SECTION 2: PROJECT AREA ....................................................................................... 3 SECTION 3: METHODS ................................................................................................. 9 3.1 Number of Bull Trout Tagged........................................................................................................................9 3.2 Trapping Facilities .......................................................................................................................................10 3.3 Tagging Procedures......................................................................................................................................11 3.4 Transport and Release..................................................................................................................................12 3.5 Fish Monitoring Systems .............................................................................................................................13 SECTION 4: RESULTS AND DISCUSSION ................................................................ 25 4.1 Mortalities ....................................................................................................................................................28 4.2 Migration Rate and Fallback........................................................................................................................28 4.3 Tributary Selection and Residence...............................................................................................................32 4.4 Mainstem Habitat Use.................................................................................................................................35 SECTION 5: CONCLUSIONS....................................................................................... 43 SECTION 6: ACKNOWLEDGMENTS .......................................................................... 45 SECTION 7: REFERENCES......................................................................................... 47 LIST OF TABLES Table 1: Weekly adult bull trout tagging schedules for Rock Island and Rocky Reach dams, 2001. Tagging schedules were based on the proportion observed (counted) during the same period during the 2000 migration............................................................................................................................................................10 Table 2: Description of the 39 adult bull trout tagged at Rock Island, Rocky Reach, and Wells dams from 15 May to 13 July 2001. .................................................................................................................................................27 Table 3: Summary of migration time (days) for adult radio-tagged bull trout that traveled between fixed station telemetry sites. Fixed station telemetry sites were located at the tailrace and ladder exits at Rock Island, Rocky Reach, and Wells dams and within tributaries. Migration time was only assessed for actively migrating fish.............31 Table 4: Summary of tributaries selected by adult bull trout and the times that they entered and left those tributaries, 2001. ................................................................................................................................................34 Table 5: Number of visits and length of time that eleven bull trout were detected within the Wells Hatchery outfall. The mean, minimum, maximum and total times are in hours and the elapsed time is in days. The elapsed time is defined as the period of time between the first and last detections at this location............................................38 Rocky Reach Project No. 2145 Final Report SS/3885 Page i November 20, 2002 LIST OF FIGURES Figure 1: Study area for assessing migration patterns of bull trout in the mid-Columbia River. Fixed radiotelemetry sites monitored the movement of bull trout near Priest Rapids, Wanapum, Rock Island, Rocky Reach, and Wells dams. Fixed sites placed in the Wenatchee, Entiat, Methow, and Okanogan rivers monitored time of entry and exodus of bull trout in large tributaries of the mid-Columbia River. ...................................................4 Figure 2: Columbia River flows passing through Wells Dam during the period May through October, 2001. ............5 Figure 3: Columbia River flows passing through Rocky Reach and Rock Island dams during the period May through October, 2001.......................................................................................................................................................6 Figure 4: Columbia River flows passing through Wanapum and Priest Rapids dams during the period May through October, 2001.......................................................................................................................................................7 Figure 5: Passage distribution plotted by week for bull trout passing Rock Island Dam, 2000, and proposed sampling distribution to achieve a sample size of 10 radio-tagged fish. Dates represent the beginning of the week on Sunday................................................................................................................................................................15 Figure 6: Passage distribution plotted by week for bull trout at Rocky Reach Dam and proposed sampling distribution to achieve a sample size of 20 radio-tagged fish. Dates represent the beginning of the week on Sunday................................................................................................................................................................16 Figure 7: Time of passage for bull trout counted at Rocky Reach Dam ladder from 15 April to 31 November 2000 and 2001.............................................................................................................................................................17 Figure 8: Time of passage for bull trout counted at Rock Island Dam ladders from 15 April to 31 November 2000 and 2001.............................................................................................................................................................18 Figure 9: Plan view of Rock Island Dam fish trap showing movement of bull trout past the viewing window and the pneumatic gate open for entry into fish trap.......................................................................................................19 Figure 10: Plan view of Rocky Reach Dam trap showing movement of bull trout past the viewing window and the pneumatic gate open for entry into fish trap.......................................................................................................20 Figure 11: Bull trout release locations upstream (1) and downstream (2) of Rock Island Dam..................................21 Figure 12: Bull trout release locations upstream (1) and downstream (2) of Rocky Reach Dam................................22 Figure 13: Bull trout release locations upstream (1) and downstream (2) of Wells Dam. Location of hatchery outfall (3) is also identified on the map. ........................................................................................................................23 Figure 14: Mid-Columbia River tributaries selected by bull trout after they were released upstream and downstream from Rock Island Dam, 2001. Final destination for radio-tagged bull trout within each tributary is noted in Table 5................................................................................................................................................................39 Figure 15: Mid-Columbia River tributaries selected by bull trout after they were released upstream and downstream from Rocky Reach Dam, 2001. Final destination for radio-tagged bull trout within each tributary is noted in Table 5................................................................................................................................................................40 Figure 16: Mid-Columbia River tributaries selected by bull trout after they were released upstream and downstream from Wells Dam, 2001. Final destination for radio-tagged bull trout within each tributary is noted in Table 5...............................................................................................................................................................41 Figure 17: Diel pattern for 11 radio-tagged bull trout detected at the Wells hatchery outfall. There were 73 visits to the hatchery outfall, but most (58) occurred between 0500-2100 hrs. ...............................................................42 Rocky Reach Project No. 2145 Final Report SS/3885 Page ii November 20, 2002 Movement of Bull Trout SECTION 1: INTRODUCTION On June 10, 1998, the U.S. Fish and Wildlife Service (Service) listed bull trout (Salvelinus confluentus) within the Columbia River basin as threatened under the Endangered Species Act (ESA) (50 CFR 63(111)). Later (November 1, 1999), the Service listed bull trout within the coterminous United States as threatened
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