Smalma,

Then I don't think there is much of a rub on the WSR. Don't allow the steelhead over the falls and there is no problem. They will cease to exist.

As for the extremely sticky situation that has been created by allowing listed native species to successfully adopt non-native habitat, I don't know. But that is just politics. The biological answer is pretty short and simple- don't allow them to access the river above the falls.

William