Compare power plants

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

Metric	Dion R Holm Tuolumne County	Collierville Powerhouse Calaveras County
Capacity	180.2 MW	253 MW
Technology	Conventional Hydroelectric	Conventional Hydroelectric
Operator	City & County of San Francisco	Northern California Power Agny
Operating units	2	2
Latest 12-month generation	550.4 GWh	397.3 GWh
Latest complete-year capacity factor	36.6% (2025)	15.4% (2025)
National technology rank	#77 of 1,349	#57 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	Dion R Holm Tuolumne County	Collierville Powerhouse Calaveras County
Capacity	180.2 MW	253 MW
Technology	Conventional Hydroelectric	Conventional Hydroelectric
Operator	City & County of San Francisco	Northern California Power Agny
Operating units	2	2
Latest 12-month generation	550.4 GWh	397.3 GWh
Latest complete-year capacity factor	36.6% (2025)	15.4% (2025)
National technology rank	#77 of 1,349	#57 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.