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- Transmission Line80,968
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Chokepoints
Grid Storage
Jocassee hydroelectric plant
30th-largest grid storage in United States of 101 · top 57% worldwide (#543 of 965)
- Operator
- Duke Energy Carolinas
- Owner
- Duke Energy Carolinas LLC
- Status
- operating
- Capacity
- 774 MW
- Technology
- pumped storage
- Commissioned
- 1973
- Also listed as
- A power plant — this site generates as well as stores
Comparable grid storages · United States · 101 ranked
- #1Red Lake Pumped hydroelectric plant3.0 GW
- #28Rocky Mountain hydroelectric plant848 MW
- #29JD Sky Pumped Storage hydroelectric plant800 MW
- #30Jocassee hydroelectric plant774 MW
- #31Western Navajo Pumped Storage 1 hydroelectric plant765 MW
- #32Eldorado Pumped Storage hydroelectric plant750 MW
Grid connection · within 50 km
- Nearest substation
- Jocassee Tie Substation
- Its voltage
- 500 kV
- Distance
- 597 m
- Strongest line nearby
- 500 kV
- Substations in range
- 3
Mapped grid infrastructure from OpenStreetMap, whose coverage is excellent in some regions and sparse in others. Nothing shown here means nothing is mappednearby — not that the site is unconnected. Lines are matched on a segment’s midpoint, so a corridor passing directly overhead can be missed; this under-reports rather than invents.
Co-located infrastructure · within 25 km
- Jocassee hydroelectric plant0 m · Power Plant · 774 MW · hydro
- 500 kV line583 m · Transmission Line
- Jocassee Tie Substation597 m · Substation / Converter
- Jocassee Tie Sub DUKE to Bad Creek Sub DUKE 500KV5.7 km · Transmission Line
- Bad Creek Hydro Substation9.2 km · Substation / Converter
- Bad Creek hydroelectric plant9.2 km · Power Plant · 2.0 GW · hydro
- Bad Creek hydroelectric plant9.2 km · Grid Storage · 2.0 GW
- Oconee Sub DUKE to Jocassee Tie Sub DUKE 500KV11 km · Transmission Line
- Keowee hydroelectric plant18 km · Power Plant · 158 MW · hydro
- Oconee Substation19 km · Substation / Converter
On the interactive map
Watercourse: Keowee River
SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)