Raccoon Mountain Pumped-Storage Plant is located in southeast Tennessee on a site that overlooks the Tennessee River near Chattanooga.

Deep in the heart of the Cumberland Plateau sits the Raccoon Mountain pumped storage plant. After an extensive upgrade in 1999, it is now TVA's largest hydro facility, with a rated output of more than 1,600 MW.

The plant, which is on the Tennessee River about 6 miles west of Chattanooga, has four pump/turbine units that together would cover a football field. The 528-acre reservoir at the top of Raccoon Mountain holds about 60 million cubic yards of water behind a dam that is 8,500 feet long and 230 feet high. Deep below the lake's surface, hundreds of feet below the mountaintop, is the powerhouse. At times of low power demand, giant turbines pump water up to the reservoir at a rate of seven million gallons per minute. This huge energy storage facility gives TVA much of the flexibility it needs to balance supply and demand on its extensive system.

The plant was idled in March 2012 due to cracks in the generators' rotors. The plant came entirely back on line in April 2014.

Open-loop Pumped Hydro Storage