It's about after the removal of the Elwha River and return of the Steelhead.
https://www.youtube.com/watch?v=9t_m1myVBBQ&feature=youtu.be&fbclid=IwAR0CMoLfr-Jt-Z8sS990EceGZx3Am-SpoEXfBr_aTsfymcLevBhbTFa8-ug
Gives hope to the restoration of the salmon if the Snake River dams would be removed.