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W R Gianelli
424 MW pumped storage hydro power plant · Merced County, California
- Operating capacity
- 424 MW
- 8 generators
- Main fuel
- Pumped storage hydro
- First unit online
- 1967
- Generation, 2023
- -281 GWh
Plant details
- EIA plant ID
- 448
- Operator
- California Dept. of Water Resources
- Sector
- Electric Utility
- County
- Merced County
- Balancing authority
- CISO
- Location
- 37.0692, -121.0772
Operating generators
Nameplate capacity and the month each began operating
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| Generator | Fuel | Capacity | Online | Status |
|---|---|---|---|---|
| 1Hydroelectric Pumped Storage | Pumped storage hydro | 53.0 MW | Jun 1968 | Operating |
| 2Hydroelectric Pumped Storage | Pumped storage hydro | 53.0 MW | Mar 1968 | Operating |
| 3Hydroelectric Pumped Storage | Pumped storage hydro | 53.0 MW | Nov 1967 | Operating |
| 4Hydroelectric Pumped Storage | Pumped storage hydro | 53.0 MW | Sep 1967 | Operating |
| 5Hydroelectric Pumped Storage | Pumped storage hydro | 53.0 MW | Aug 1967 | Operating |
| 6Hydroelectric Pumped Storage | Pumped storage hydro | 53.0 MW | Jul 1967 | Operating |
| 7Hydroelectric Pumped Storage | Pumped storage hydro | 53.0 MW | May 1967 | Operating |
| 8Hydroelectric Pumped Storage | Pumped storage hydro | 53.0 MW | Mar 1967 | Operating |
Generation and emissions, 2023
EPA eGRID annual data
- Net generation
- -281 GWh
Net generation is negative when a plant uses more electricity than it sends to the grid, which is normal for storage plants.
Nearby power plants
Within 25 miles
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| Plant | Fuel | Capacity | Distance |
|---|---|---|---|
| ONeill | Pumped storage hydro | 25.2 MW | 2.6 mi |
| Quinto Solar PV Project | Solar | 108 MW | 4.4 mi |
| Dinosaur Point | Wind | 17.4 MW | 5.4 mi |
| Wright Solar Park | Solar | 200 MW | 7.8 mi |
| Central 40 | Solar | 40.0 MW | 12 mi |
| Merced 1 PV | Solar | 3.0 MW | 12 mi |
| Lara 2 Hybrid | Battery storage | 1.6 MW | 12 mi |
| Godinho Dairy Digester | Biomass | 2.0 MW | 12 mi |
Frequently asked questions
- How much power can W R Gianelli produce?
- W R Gianelli has 424 MW of operating nameplate capacity across 8 generators as of August 2026.
- Who operates W R Gianelli?
- EIA lists California Dept. of Water Resources as the operator of W R Gianelli.
- How much electricity did W R Gianelli generate?
- W R Gianelli reported -281 GWh of net generation in 2023, according to EPA eGRID.
Source: U.S. Energy Information Administration, Form EIA-860M (August 2026); U.S. EPA eGRID2023 · Data for August 2026