Hi Leah
I remember hearing about Lake Keowee and the hothole but never had a chance to dive there. Sounds like a good place to dive in the winter and early spring with the warm water. We have a couple of steam plants over here and Watts Bar Nuclear Reactor and I wonder if there is any warm water diving there? Would be nice to find out.
Norris is still a little cold, maybe 50F or so but then on same dive I saw 42F readings so not sure what that actually was last time I dove there last week. Norris does not have the visibilty as Jocassee but is the clearest lake near knoxville where I live. I have never dove South Holston Lake in the tri-cities or Dale Hollow Lake, only snorkled at the later, but both of those are suppose to be about the clearest dives here in TN besides the Quarries. Either though is over 100 miles from me though, so a rather long drive for me.
Safe Diving,
James