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Chokepoints
Grid Storage
Seneca hydroelectric plant
63rd-largest grid storage in United States of 101 · top 70% worldwide (#674 of 965)
- Operator
- Seneca Generation
- Owner
- LS Power Development LLC
- Status
- operating
- Capacity
- 438 MW
- Technology
- pumped storage
- Commissioned
- 1970
- 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
- #61Yards Creek hydroelectric plant453 MW
- #62Juan Torres Mesa Pumped hydroelectric plant450 MW
- #63Seneca hydroelectric plant438 MW
- #64Taum Sauk hydroelectric plant408 MW
- #65Mokelumne Pumped Storage hydroelectric plant400 MW
Grid connection · within 50 km
- Nearest substation
- Pierce Brook Substation
- Its voltage
- 345 kV
- Distance
- 49 km
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
- Seneca hydroelectric plant0 m · Power Plant · 438 MW · hydro
On the interactive map
Watercourse: Allegheny River
SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)