Most of the big damns up here in the PNW already have fish ladders. They help but they only partly mitigate the issue. There's a pretty crazy company developin

Most of the big damns up here in the PNW already have fish ladders. They help but they only partly mitigate the issue. There's a pretty crazy company developing this system that actually shoots fish up the damn like those pneumatic canisters bank drive throughs use (or used?). I just remember seeing a video about it but don't know anything more.