I'm attaching a diagram and a couple photos of a spot I fished a few times in Oct. before the cold weather hit. I caught a few smaller Flatties and Channel Cats but I'm trying to figure where the best place to anchor to fish all night for the big Flatties would be. This a lock & dam on a local river. The pool between the downstream lock & dam and this one is about 7 miles long and dredged out the whole length and averages between 30 & 40 ft deep in many places. The water depth by this dam is quite shallow near the lock only about 5ft but gets to around 50ft on the other side where there is a hydro plant. There is a sideways undertow here. The hydro plant draws water in and discharges it below the intake. The buoys are about 50 yards from the dam so it's possible to cast right up in there if you want. Would the Flatties that inhabit this spot stay here all the time or would they travel shallow at night? If they do move out of the deeper water would they head to the 5 ft water by the lock or would they move downstream to feed? Should I just anchor and fish the 50 ft. water all night? I really think there could be some big un's here, I just have to come up with the proper plan of attack. I want to know what you guy's think?