1. Steelhead status in Idaho 2010 update
Photograph by Ron Roberts

2. Dworshak
1972
Hells
Canyon
1967

3. Lower Granite Dam
Snake River Steelhead DPS. Three MPG’s in Idaho—Hells Canyon, Salmon, and Clearwater.

4. Steelhead return to Lower Granite Dam
The proportion of total run that is wild has declined since early 1960’s. In 1960’s wild fish made up > 95%; in 1970’s about 60%; in 1980’s about 33%; in 1990’s about 14%; and since 2000 has averaged 13% (range 6% to 19%) of the total run. Since Run year an average of 11% of the hatchery origin fish were unclipped (range 9% – 15%). Average wild run = 19,793. Average wild run (black dotted line)= 26,265.
Idaho Power hatcheries began smolt releases in mid-1960’s. Dworshak NFH in 1970.
Spawn year

5. Proportion of wild Steelhead at Lower Granite Dam

6. Fall 2010 Return at Lower Granite Dam
Large (> 78 cm)
Clipped
Hatchery
Unclipped
Hatchery

7. Snake and Salmon drainages--Steelhead fishing area

8. Clearwater drainage--Steelhead fishing area

9. Steelhead fall harvest in Idaho since 2000
Sport harvest is from anglers with an Idaho permit only. Does not include harvest in WA & OR waters or sport harvest of anglers who only purchased a Nez Perce tribal license. Snake harvest is of anglers who purchased Idaho permit only (does not include anglers who only had an Oregon or Washington permit).

10. Steelhead spring harvest in Idaho since 2000
Sport harvest is from anglers with an Idaho permit only. Does not include harvest in WA & OR waters or sport harvest of anglers who only purchased a Nez Perce tribal license. Snake harvest is of anglers who purchased Idaho permit only (does not include anglers who only had an Oregon or Washington permit).

11. Comparison of Chinook and Steelhead harvest

12. Yearly Angler effort (days fished)