Besides the roadbed wich is pretty much a levee thats 25ft across and is about 8ft below the surface on top with drops on either side and the shoals there is no real structure in the lake basin, its e renovated lake that was silted in bad so pretty much wat they did was was removed silt from around the shores to make the average depth deeper along with all the jetties,breakwaters,island and vegitation barriers and added the rip rap on the shorelines. Theres no thermocline in the lake...the dam has a small outlet structure on the sw corner of the dam but does not create any current, theres water going into it but its there to keep the lake at normal pool although it will get high for a couple days with good rains..