Snake River, Hells Canyon Dam to Clearwater Confluence (Lewiston): Fishing Access, Flows & Map | Barbless.co Idaho

Migration · Snake River, Hells Canyon Dam to Clearwater Confluence (Lewiston)

Steelhead and salmon counted at Lower Granite Dam, the last dam below Idaho, and how this year's run compares with the last ten.

Counts through Sat, Oct 17 · yesterday

Lower Granite is the last dam below Idaho. Fish counted there are headed for the Snake, Clearwater and Salmon systems. This reach is the first Idaho water above the dam; fish for every Idaho river pass through it.

Steelhead

Steelhead · Lower Granite Dam

Well below typical

The run is tapering off

Counted Oct 17

250

7-day average

303

Percentile for the date

0th

This run so far

25,959

Passage over the last three days is well below typical for mid-October (0th percentile).

25,959 steelhead have passed Lower Granite since June 16. In a typical year about 77 percent of the run is through by October 17, and passage peaks around October 4.

On pace for roughly 32,000 to 36,000 fish, against a typical 71,000.

Wild fish: 5,568 so far, about 74 percent of a typical wild run.

Passage over time

Bars are the day's count at Lower Granite through Oct 17. The dashed line is what the date usually brings, the ten-year median.

Spring chinook: over for the year, 28,119 passed Lower Granite against a typical 37,000.Season over
Summer chinook: over for the year, 7,941 passed Lower Granite against a typical 8,900.Season over
Fall chinook: over for the year, 23,408 passed Lower Granite against a typical 29,000.Well below typical

When they reach this water

Antennas in the water read tagged fish as they swim past. A best guess is our estimate of the peak; fish seen are dates real fish were actually recorded. Each spot below says whether it sits on this river or on a tributary.

No arrival timing for the Snake River yet: no PIT-tag array reads this stretch, so the run status above is Lower Granite Dam's.

Arrival timing from PIT-tag detections via PTAGIS and Columbia River DART; tagged fish are a sample of the run, never a count.

Counts by the U.S. Army Corps of Engineers via Columbia River DART.