I have a few thoughts on this. My main concern would be erosion, like Strick said. I'd be more worried about this going badly than the limited benefits. I see a high likelihood of sediments getting into these very delicate trout streams and messing all that up.

White pine is certainly abundant up there, but i feel like some manual thinning and small scale prescribed burning/ limited herbicide use would be better suited than spraying and burning 1600 and 1400 acres, especially considering the entire project area is only 2100 acres.

Just my opinion though...