Would say there should be some there. As there all along the Tn river. And they catch them below Nickajack dam.
I would fish below the dam and try it. But bet you can catch them above it also. As we catch them here above the dam around the lock walls.
They tagged some at Ky Dam years ago. And the tracked them through the dam at Pickwick ( Through the locks) and on up the lake. Last I heard they were at Nickajack. That is a long trip. but they do move a lot.

Pete