Upon a quick look up on google, it looks like where pimmit run enters the potomac makes a slight bend. I can see some downed trees (granted don't know how old the image is I'm looking at) but with that run entrance and the river bend should be a good place for drifts to build. Also looks like some good sized rocks.
Minnows or minnow imitation lures on the smaller size should produce mid way of the water column.