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Helms Pumped Hydro
Pumped Hydro
Capacity (MW): 1,212.00
Status: Operating
California, USA

Description: Helms came on line in 1984 in the Sierra Nevada Mountains 50 miles east of Fresno. It features two reservoirs, four miles of tunnels between them, and three pump-generators that can produce enough electricity to power the cities of Fresno and Oakland. Helms' three turbine-generators were refurbished in 2012.

Analyst Notes:

Development Timeline:
Time of ChangeYear of ChangeStatusCapacity
••••••••••••• ••••••••••••• ••••••••••••• 1,212.00

Companies Involved:
Company NameCompany Role
Pacific Gas & Electric (PG&E) •••••••••••••
Pacific Gas & Electric (PG&E) •••••••••••••
Pacific Gas & Electric (PG&E) •••••••••••••