For the current year, some of the sites are several days behind in reporting, but are reported by the COE as zero, so when zeros appear in current year data, the data should be considered as "not yet reported".
Willamette Falls counts for: Chinook, Steelhead, and Coho only. Also, summer Chinook are not counted at Willamette Falls Dam.
Shad are not counted at Willamette Falls, The Dalles, John Day, Lower Monumental, Little Goose, Rock Island, Rocky Reach and Wells Dams. Additionally, shad are typically not counted at any of the Corps dams after August 31 each year and shad are not counted at all Corps dams.
Unclipped steelhead are a subset of steelhead. Unclipped steelhead are counted separately from hatchery steelhead at Corps dams on the Columbia and Snake Rivers. Unclippped steelhead are identified as fish with an intact adipose fin. However, a small number of hatchery fish may not have had their adipose fin removed.
Page design last updated on: November 6, 2018