Fish passage collage
Detailed Description
From left: Fish ladder at John Day Lock and Dam (Credit: Karim Delgado, USACE). The floating surface collector on the Clackamas River helps juvenile salmon go downstream safely past hydropower facilities (Credit: NOAA Fisheries). Chinook salmon in the holding pool at Keswick Dam (Credit: Steve Martarano, USFWS).
Sources/Usage
Public Domain.