I have been all over the lake with quality electronics and the deepest area is in the creek channel near the dam, approximately 70' at summer pool level. Just checked a couple of my topo maps I keep in my boat, and they confirm that information. The constant erosion of farmland around the river, creeks and reservoir will always be a factor in changing the depths as silting in occurs. It's a good fishery and if you can structure fish the creek channels, points and timbered areas, you will do well.