The best diving is on the east side of the lake. Mostly rock bed with really big rocks. Very little current, and visibility will differ from day to day and weather conditions. There are a lot of different access points to the lake on the east side, as well, with facilities and boat ramps. You will have to do some research and exploring to find them though. I have heard there is some excellent fast water diving below the dam, but I haven't tried that yet.