Adult Returns for Columbia and Snake River Dams - Graph Adult Salmon Database
  • Graph comparing two consecutive years and a 10 year average (this includes 10 years of data ending one year prior to the most recent year selected).

Step 1. Choose one of the following Adult Passage Reporting sites:
The dates used to graph the selected data are based on historical adult dam counting schedules.
Step 2.  Select Species:
3. Select Years
4. Submit Request or Form


  • Willamette Falls only has ladder counts for spring chinook, fall chinook and steelhead.
  • Willamette Falls does not have 10 year average data.

Page last updated on: April 11, 2012

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