Pumped Storage Hydro Plants in the United States

Every operating pumped storage hydro plant the US Energy Information Administration lists on form EIA-860M, plotted on one map of the United States and listed in full: 33 plants, 149 generating units, 22 GW of nameplate capacity across 16 states.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Plants
33
149 generating units
Nameplate capacity
22 GW
States
16
Grid operator
Mixed
no single ISO covers a majority

Map of pumped storage hydro plants in the United States

Every one of the 33 plants is drawn at the coordinate EIA files for it.

Loading map…
  • Pumped storage · 33

List of pumped storage hydro plants in the United States

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

pumped storage hydro plants in the United States
Bath CountyHydroelectric Pumped StorageVirginia Electric & Power CoBath2,86261985Operating
LudingtonHydroelectric Pumped StorageConsumers Energy Co - (MI)Mason1,978.861973Operating
Raccoon MountainHydroelectric Pumped StorageTennessee Valley AuthorityHamilton1,713.641978Operating
Castaic2 technologiesLos Angeles Department of Water & PowerLos Angeles1,68271972Operating
Bad CreekHydroelectric Pumped StorageDuke Energy Carolinas, LLCOconee1,68041991Operating
Northfield MountainHydroelectric Pumped StorageFirstLight Power Resources, Inc. - MAFranklin1,16841972Operating
Muddy RunHydroelectric Pumped StorageConstellation Power, IncLancaster1,07281967Operating
Helms Pumped StorageHydroelectric Pumped StoragePacific Gas & Electric Co.Fresno1,05331984Operating
Blenheim GilboaHydroelectric Pumped StorageNew York Power AuthoritySchoharie1,00041973Operating
Rocky Mountain Hydroelectric PlantHydroelectric Pumped StorageOglethorpe Power CorporationFloyd847.831995Operating
JocasseeHydroelectric Pumped StorageDuke Energy Carolinas, LLCPickens77441973Operating
Bear SwampHydroelectric Pumped StorageBear Swamp Power Company LLCBerkshire66621974Operating
Richard B Russell2 technologiesUSCE-Savannah DistrictElbert62881985Operating
Fairfield Pumped StorageHydroelectric Pumped StorageDominion Energy South Carolina, IncFairfield587.281978Operating
Yards Creek EnergyHydroelectric Pumped StorageYards Creek EnergyWarren45331965Operating
Seneca Generation LLC2 technologiesSeneca Generation LLCWarren437.931970Operating
W R GianelliHydroelectric Pumped StorageCalifornia Dept. of Water ResourcesMerced42481967Operating
Taum SaukHydroelectric Pumped StorageUnion Electric Co - (MO)Reynolds40821963Operating
Wallace Dam2 technologiesGeorgia Power CoHancock321.261979Operating
Cabin CreekHydroelectric Pumped StoragePublic Service Co of ColoradoClear Creek30021967Operating
SalinaHydroelectric Pumped StorageGrand River Dam AuthorityMayes259.261968Operating
Lewiston NiagaraHydroelectric Pumped StorageNew York Power AuthorityNiagara240121961Operating
Mount ElbertHydroelectric Pumped StorageU S Bureau of ReclamationLake20021981Operating
J S EastwoodHydroelectric Pumped StorageSouthern California Edison CoFresno199.811987Operating
Hiwassee Dam2 technologiesTennessee Valley AuthorityCherokee165.621940Operating
Harry TrumanHydroelectric Pumped StorageUSCE-Kansas City DistrictBenton161.461979Operating
Horse Mesa2 technologiesSalt River ProjectMaricopa131.341927Operating
Thermalito2 technologiesCalifornia Dept. of Water ResourcesButte115.141968Operating
Mormon Flat2 technologiesSalt River ProjectMaricopa63.521926Operating
Clarence Cannon2 technologiesUSCE-St Louis DistrictRalls5821984Operating
WaddellHydroelectric Pumped StorageCentral Arizona Water Conservation DistMaricopa4041993Operating
Rocky River (CT)Hydroelectric Pumped StorageFirstLight Power Resources Services LLCLitchfield3131928Operating
ONeillHydroelectric Pumped StorageU S Bureau of ReclamationMerced25.261967Operating

Largest pumped storage hydro plants in the United States

  1. 1Bath CountyBath County, Virginia2,862 MW
  2. 2LudingtonMason County, Michigan1,978.8 MW
  3. 3Raccoon MountainHamilton County, Tennessee1,713.6 MW
  4. 4CastaicLos Angeles County, California1,682 MW
  5. 5Bad CreekOconee County, South Carolina1,680 MW
  6. 6Northfield MountainFranklin County, Massachusetts1,168 MW
  7. 7Muddy RunLancaster County, Pennsylvania1,072 MW
  8. 8Helms Pumped StorageFresno County, California1,053 MW
  9. 9Blenheim GilboaSchoharie County, New York1,000 MW
  10. 10Rocky Mountain Hydroelectric PlantFloyd County, Georgia847.8 MW

Pumped storage hydro plants by state

Every state EIA-860M reports for this fuel. Each links to that state’s own map and list.

Pumped Storage Hydro Plants in the United States: FAQ

Where can I find a map of pumped storage hydro plants in the United States?
The map on this page. It plots every one of the 33 operating pumped storage hydro plants in the US that EIA-860M reports for 2026-07, at the coordinates EIA files for each plant. It is a US map: EIA-860M covers the fifty states and DC, so a North American map including Canada and Mexico is out of scope here.
How many pumped storage hydro plants are there in the US?
33, totalling 22 GW of nameplate capacity across 149 generating units in 16 states. That is the EIA-860M count for 2026-07; Hydroelectric pumped storage.
Is there a pumped storage hydro plant near me?
Pick your state from the list below to get the pumped storage hydro plants in it, with the county each one sits in. The nearest plant to any address is whichever of those is closest — this site does not read your location.
What is the largest pumped storage hydro plant in the USA?
Bath County in Virginia, at 3 GW of nameplate capacity. The full list on this page is sorted largest first.
Where does this data come from, and how current is it?
The US Energy Information Administration's form EIA-860M, the preliminary monthly electric generator inventory, for 2026-07. It is a survey of plants of 1 MW and above; anything smaller is not in it, and nothing on this page is estimated to fill that gap.