I think the Feds are ordering the tide to stop. There is no way to stop Pickering from killing at least one fish.
This seems to be a recent picture. Notice all the crazy nets everywhere! When I was there, we started with the ridiculous 'toilet bowl', which was a vortex created by sucking out water with a bypass pump. This was supposed to stop silt being sucked into the machinery. Then we had one exceptional winter when ice blocked the system, so they had to put in that stupid ice boom you can see in the middle of the intake.
Then, they had algae blocking things, so they put up an algae net, which is now buried in the fish net. At one time we were proposing to dig an intake tunnel. I think it would have turned out a lot cheaper!