"Most of this week TVA has been spilling extremely warm water over the top of Apalachia Dam on the Hiwassee River, potentially endangering the trout fishery. A TVA spokesman says the breakdown of one of two generators forced them to spill water over the top of the dam. He says however that the generator was repaired Wednesday afternoon and operation is back to normal."
also stated in the article: "...one of our supervisors is really concerned about what the warm water temperatures and low oxygen could do to the fish."
...I don't think it requires a supervisor to figure that one out