Channel cats are a for sure. Flatheads I don't think are very common if in there at all.

 

I have caught some channels while bass fishing. A few years ago i saw a channel just swimming past the boat that was a good 15#.

 

might be some in there-very few if they are. i have never heard of em being caught there-have seen some really nice channel cats come out of there. attwood would be your best bet down that way for flatheads

 

fished a cat tournament a couple years back at leesville. At weigh in there were a few small ones.