Nomad - Keep this link handy, there is a smart phone compatible link also -
http://www.tva.com/river/lakeinfo/ Select your dam of choice and you will get historical and projected discharge rates. For you, select Cheatham and Old Hickory and you can see the volume of water headed your way. At OHD, 35,800 Cubic feet per second is a ton of water and at Cheatham 46,000 CFS is also huge.