Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Helms Pumped Storage Fresno County	Haas Fresno County
Capacity	1,053 MW	135 MW
Technology	Hydroelectric Pumped Storage	Conventional Hydroelectric
Operator	Pacific Gas & Electric Co.	Pacific Gas & Electric Co.
Operating units	3	2
Latest 12-month generation	1.11 TWh	153.3 GWh
Latest complete-year capacity factor	—	14.7% (2025)
National technology rank	#8 of 39	#112 of 1,349
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.

Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Helms Pumped Storage Fresno County	Haas Fresno County
Capacity	1,053 MW	135 MW
Technology	Hydroelectric Pumped Storage	Conventional Hydroelectric
Operator	Pacific Gas & Electric Co.	Pacific Gas & Electric Co.
Operating units	3	2
Latest 12-month generation	1.11 TWh	153.3 GWh
Latest complete-year capacity factor	—	14.7% (2025)
National technology rank	#8 of 39	#112 of 1,349
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.