I don't know about a downstream dam, except that supposedly the WS is now free flowing so it's hard to imagine another dam downstream. Friends talk about possibly doing a 3 day trip along the WS, so I doubt it. It might be just a dam that is actually run as a rapid, I can't remember the name. I have no idea how far it is, but I think above Green Truss. Hopefully someone who actually knows something about the area chimes in.
yes, they are going to completely remove it.
Here's a streaming web cam, long wait but whoever is controlling it right now is looking right at the WS outlet.