Don't think Grand is, but the other 2 are hydroelectric lakes, meaning they use water flow to create electricity. Water release is more a constant there than a place like Fork (this past year notwithstanding), where the dam might not be opened for months. Fish on Kentucky have to adapt to the atmospheric conditions. Lavon is another place where open gates shuts down the bite. Ray Hubbard may be the same way, but I wouldn't know since I don't fish that hell hole.