It depends on when the water comes up.

I remember reading at one point that Watts Bar was having problems because the crappie would start spawning at winter pool level, and then the water would come up and the spawn would be ruined because the beds were too deep. I think they were going to adjust the date when they started filling to summer pool to try and help the crappie, but I don't live in that area so I don't know if it ever got done or not.