The first mitigation requirement was X fish to the dam. WDF (some would say conveniently) harvested those fish in the ocean. Tacoma complained but WDF liked how it was written...

The new license changed the parameters. One that got me was that permanent up and down passage above would need to be installed if Spring Chinook or Steelhead achieved self-sustaining status. As I recall, the first type of trap was approaching steelhead sustainability (which would trigger permanent passage) but was getting next to no springers. So, that trap was abandoned in search of a new one that would trap Springer smolts. It got more salmon, not enough for sustainability, but blew away any hopes for the steelhead. I think WDFW preferred either the Springers or overall failure............