my only question:

Are/were beavers and/or trout native to the watershed?


If in historical times, trout and beavers co-existed then the trout will survive, after all, that was the plan.

If the trout weren't there, but the beaver were, then keep the beaver. After all, the trout are planters or descendents of them, and the beaver are just fulfilling the plan. Don't let fishing get in the way of that.

If the trout were, but the beaver weren't, by all means get rid of the dam, and let the native trout fulfill the plan. Don't let a love of beavers get in the way of that.