Yes... I think the lake was impounded in late 70's....
I remember when there were walleye in it
Wasn't the lake closed to the public for several years after the power plant was completed. I know when I started fishing it in 1988/89 it was not open Monday thru Wednesday.
All walleyes died within a few years, water was too hot. Smallmouths never established a solid population, have any been caught since the reopening.