The dam in recent years is more about flood control and water for the plant. That river is one of those that in large events just goes crazy. The mitigation has worked ( after WDFW was forced to comply with the agreement ) even to the benefit of Springers and as long as the mit continues not much to bitch about. The dam also supplies water gravity fed to the hatchery which mostly produces Coho for the South Sound net pens directed toward tribal fisheries. No net pen fish for tribal = massive reductions for Puget Sound NT Coho fisheries all the way to the ocean. Always be careful what you ask for.