There were two Elwah dams. One generated power. The dam removal was a disaster and continues to this day. The Port Angeles water supply remains at risk and has problems for instance. It also turns out that the removals themselves were disasters as well. It was done by the Park Service and they were clueless big time.
There is actually a video of the entire mess around someplace. They tried, very hard to un-mess that but that even failed.
The removals were screwed up from the beginning but the Indians are happy and there will be more salmon for the sea lions to eat so they can breed more sea lions to eat more salmon thereby accomplishing, basically nothing.