Hiwassee , no grass there either. Looking like contaminants from industry could be to blame. Can usually smell nasty s--- coming off the water all over that river. Very offensive. It was real bad last fall. On down river too. I remember about 2 years ago, there was a lethal Sulfer Dioxide spill up at I 75. The media came out with it an mentioned "It was a good thing there was no one on the water up there at the time. Could have been real bad". That got swept under the rug.