Where is Helms Pumped Storage?

In Fresno County, California (CA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

How big is Helms Pumped Storage?

1 GW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.

Who owns Helms Pumped Storage?

EIA-860M names Pacific Gas & Electric Co. as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Helms Pumped Storage LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Pacific Gas & Electric Co. here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Helms Pumped Storage LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Helms Pumped Storage still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Helms Pumped Storage

Helms Pumped Storage is a 1 GW pumped storage hydro plant in Fresno County, California, operated by Pacific Gas & Electric Co.. EIA-860M lists 3 generating units here, inside CAISO. Its units entered service in 1984.

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

Nameplate capacity: 1,053 MW; 1,212 MW net summer
Generating units: 3
In service: 1984
EIA plant ID: 6100

Where it is

Loading map…

County: Fresno County, California
Coordinates: 37.0293, -118.9683
Balancing authority: CISO
Sector: Electric Utility

Units, technology and status

Operator of record: Pacific Gas & Electric Co.
Primary energy source: Pumped storage
Technologies: Hydroelectric Pumped Storage
Status: Operating

Every plant Pacific Gas & Electric Co. reports to EIA →

Helms Pumped Storage: FAQ

Where is Helms Pumped Storage?: In Fresno County, California (CA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Helms Pumped Storage?: 1 GW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.
Who owns Helms Pumped Storage?: EIA-860M names Pacific Gas & Electric Co. as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Helms Pumped Storage LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Pacific Gas & Electric Co. here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Helms Pumped Storage LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Helms Pumped Storage still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.