W R Gianelli
Merced County, California · EIA plant ID 448 · Operator: California Dept. of Water Resources
Nameplate424MWSummer 401 MW
Generators8in service
Net generation-250GWh12 mo to Aug 2026
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online1967
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 147.8 | — | — |
| 2002 | -137.7 | — | — |
| 2003 | -296.9 | — | — |
| 2004 | -401.8 | — | — |
| 2005 | -390.9 | — | — |
| 2006 | -206.4 | — | — |
| 2007 | -20 | — | — |
| 2008 | 183.8 | — | — |
| 2009 | -214.1 | — | — |
| 2010 | -345.3 | — | — |
| 2011 | -287.5 | — | — |
| 2012 | 89.9 | — | — |
| 2013 | 5.5 | — | — |
| 2014 | -142.4 | — | — |
| 2015 | -26.4 | — | — |
| 2016 | -317.2 | — | — |
| 2017 | 43.7 | — | — |
| 2018 | -125.5 | — | — |
| 2019 | -95 | — | — |
| 2020 | -24.4 | — | — |
| 2021 | -15.5 | — | — |
| 2022 | -92.7 | — | — |
| 2023 | -280.7 | — | — |
| 2024 | -208.2 | — | — |
| 2025 | -152.4 | — | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Hydroelectric Pumped Storage | PS | 53 | 51 | Jun 1968 | Operating | — | coming soon |
| 2 | Hydroelectric Pumped Storage | PS | 53 | 50 | Mar 1968 | Operating | — | coming soon |
| 3 | Hydroelectric Pumped Storage | PS | 53 | 50 | Nov 1967 | Operating | — | coming soon |
| 4 | Hydroelectric Pumped Storage | PS | 53 | 50 | Sep 1967 | Operating | — | coming soon |
| 5 | Hydroelectric Pumped Storage | PS | 53 | 50 | Aug 1967 | Operating | — | coming soon |
| 6 | Hydroelectric Pumped Storage | PS | 53 | 50 | Jul 1967 | Operating | — | coming soon |
| 7 | Hydroelectric Pumped Storage | PS | 53 | 50 | May 1967 | Operating | — | coming soon |
| 8 | Hydroelectric Pumped Storage | PS | 53 | 50 | Mar 1967 | Operating | — | coming soon |
Owner / operator
Operator: California Dept. of Water Resources. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| California Dept. of Water Resources | 55.0% | 233 MW |
| U S Bureau of Reclamation | 45.0% | 191 MW |
Nearby plants
Within 80 km.
| ONeill | 25 MW | 4.2 km |
| Gonzaga Ridge Wind Farm | 133 MW | 4.6 km |
| Quinto Solar PV Project | 108 MW | 7.1 km |
| Dinosaur Point | 17 MW | 8.6 km |
| Gonzaga Ridge Battery Facility | 52 MW | 10.3 km |
| Stellar Wright BESS | — | 12.2 km |