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Raccoon Mountain Pumped Storage Plant

Technology Type Open-loop Pumped Hydro Storage
Rated Power 1652000 kW
Duration at Rated Power (HH:MM) 0:15.00 / 22.00
URL More about Raccoon Mountain Pumped Storage Plant
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.
This data has been validated by project staff through a review of publicly available information about the project, and verified by the project owner. Information is accurate as of 2016-04-29.
Project Status
Status Operational
Commissioning On DD.01.YYYY
Project Includes Multiple Systems No

Cummings Hwy.
Chattanooga, Tennessee 37419
United States

Utility Tennessee Valley Authority
Utility Type Federally Owned
Paired Grid Resource Transmission
Project Includes Multiple Systems No
Ownership & Value Chain Partners
Ownership Model Utility-Owned
Equity Owner 1 Tennessee Valley Authority
Equity Owner 1 Percent 100%
Cost & Performance
Performance The facility can generate electricity for up to 22 hours before needing to draw water up again for 28 hours to fill the mountaintop reservoir.
Capital Expenditure $300000000
Service Use Case Electric Energy Time Shift
Electric Supply Capacity
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