Right now you will need to put in below the williams fork. Only 178 out of windy gap (through byers) but williams fork is adding 300. There is a another 370 coming in on the blue and whatever the tribs are adding as well. Don't think you will have 1100 just because pumphouse has that water.
I remember seeing some folks floating that stretch and a couple river wide barb fences that are only in play at highwater.