I fish TN tailwaters alot. Pickwick Dam is under rehab now, there is an area of concern where it may fail in a major earthquake on one area.
Center Hill has a unique area we found trout to be gathered in, looked like a spring coming out of the base of a bluff. But, water from the lake above had worked its way around the dam on the bluff side and made a hole. I don't think there was a plan to fix that, but the other side was going thru a rehab in the earthen part.
The dam above Center Hill created a big gusher thru a bluff that made a nice waterfall too.
Best way to avoid any issues, just don't live downstream. I have seen many get flooded out along the Mississippi River over the year and the only fault is that they picked a poor place to build a house.