Re: River walleye question
The same locations that produce in the spring will also produce in the fall.
The first mile below dams, creek mouths, inside seams on river bends, channel edges, industrial discharges and bridge piers would all be good locations to start. Use your electronics to find the bait and the eyes won't be far away. Just be advised that there will be a lot of interference on your screen directly downstream from the dams due to the turbulence, so fishing in those areas will be more trial and error than anything.
I fish the lower Allegheny for eyes pretty frequently, so if you have any more specific questions feel free to shoot me a PM.