Salmon and Steelhead

Salmon and steelhead migrating through the Bonnerville Dam.

(Greg Winters/USGS) Click for full size.

One comment on “Salmon and Steelhead

  1. Mark W. says:

    I had heard years ago that about 10% of salmon die attempting to go around each dam on the Columbia river. After nine dams, only 0.9^9 or 39% of the original population survive. I hope they have improved the percentage.