Georgia has claimed a 200 years section of The River in Jackson County to actually be part of their state--after a surveying mistake 150 years ago. They've wanted to pump water out of the Tennessee River and send it in pipelines to Atlanta.
TVA and three states have fought Georgia on this pipeline for years and years. Drawing major amounts out of the river would screw up industry down river. #1, they've got to have enough water flow to keep the powerplants running. #2, they've got to have enough water to keep the chemical factories in Decatur, the Counce sawmill and the nuclear fuel factory in Paducah area running. #3, it takes deep water to get NASA payloads out of Huntsville and rockets out of Decatur.
A lack of water flow and low water levels would result in 100's of thousands of people to be laid off and essentially destroy the economy of the lower Tennessee Valley.