1. Drought Impacts to Bull Trout in the Yakima Basin – 2001 (2005?) John Easterbrooks, Region 3 Fish Program Manager

2. “Adfluvial” (lake dwelling, stream spawning) bull trout populations in three Yakima Basin irrigation storage reservoirs (Keechelus, Kachess, and Rimrock) were affected by the severe drought of 2001. Similar conditions are anticipated in 2005. Blocked upstream passage into spawning tributaries in late summer as the reservoirs are drained is the primary impact. Lower stream flows in 2005 may cause passage problems to occur earlier in the summer, depending on the rate of reservoir drawdown. Corrective actions were implemented at Kachess and Rimrock reservoirs in 2001 to improve passage conditions for mature adults to prevent loss of a year class of juvenile production.

4. Gold Creek – Keechelus Reservoir (headwaters of the Yakima River near Snoqualmie Pass) (no remedial action because of upstream flow problems)

5. Lower Gold Cr. and Keechelus Reservoir

6. Alluvial Fan at Mouth of Gold Cr.

7. Gold Cr. Impassable Conditions

8. Gold Creek – July 20

9. August 1August 15

10. Box Canyon Creek – Kachess Reservoir

11. Overview of channel modification on Kachess Reservoir lake bed

12. Construction of passage flume

13. Straw bale, T-post & Plastic Sheet Flume Design

14. Lower end of Box Canyon Cr. bull trout passage flume

15. Passage flume looking upstream

16. Finished flume with rock weirs to create a series of pools

17. Mouth of Box Canyon Cr. flume and Kachess Reservoir

18. First weir at mouth of flume and attraction flow

19. Adult bull trout in Box Canyon Cr. passage flume

20. Box Canyon flume after fall rains

21. Indian Creek – Rimrock Reservoir (upper Tieton River basin near White Pass; tributary to the Naches River)

23. Multiple channels at mouth of Indian Cr.

24. Plastic and straw bale wing dam flow diverter

25. Indian Cr. with flow diverter (left) and N.F. Tieton River (right)

26. After fall rains in October, 2001

28. South Fork Tieton R. – Rimrock Reservoir Barrier waterfall develops when reservoir storage content drops below 127,000 acre- feet. USBR attempts to operate reservoir to stay above that level through Aug. 12 to provide bull trout passage. Late in the season, the falls and shallow, multiple channels across the lake bed presents a hazard to post-spawn adults returning to the lake.

29. S.F. Tieton Falls, height = 10 meters, reservoir content 48,000 acre-feet

30. S.F. Tieton R. below falls across Rimrock Reservoir lake bed

31. Mouth of S.F. Tieton R. and Rimrock Reservoir at 48,000 ac-ft.