The Fish Ladder

photo by Daisy Flores-Salgado (c)

photo by Daisy Flores-Salgado (c)

"At the Fish Ladder, a 21-step water "ladder" allows fish to swim upstream or downstream on a gradual incline, bypassing the locks. Adult salmon return from the sea from June to November, steelhead salmon return to spawn from January through April, and young salmon make their way out to sea in May and June. An underwater viewing gallery lets visitors watch the fish from underwater." Source from here.

I was surprised to see that there is a Fish Ladder under the Locks where you can actually observe the Salmon swim upstream through the underground window which looks like an aquarium but it is not. The locks allow the passage of the Salmon which is amazing.