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- Wind & solar
- Storage
- Under construction
- Operating
- 10 · 100 · 1,000 MW
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- Wind & solar
- Storage
- Under construction
- Operating
W R Gianelli: location and 6 exact-grade projects within 15 mi. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
W R Gianelli
Power plant · Pumped hydro storage
Key facts
Power plant · Pumped hydro storage Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1967
- Net generation, 2025
- -152,350 MWh
- Grid
- 230 kV to Pacific Gas & Electric Co (CISO)
- Location
- Merced County, California
- Operated by
- California Dept. of Water Resources
Output
Details
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- Technology
- Pumped hydro storage source: “Hydroelectric Pumped Storage”
- Age
- 59 years since 1967
All 5 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Gem |
|
| Grid |
|
| Fuel burned (MMBtu), 2025 | 0 |
| Net generation (MWh), 2025 | -152,350 |
| Balancing authority code | CISO |
Data notes (1)
- Capacity factor, 2025 not shown: net generation -152350.0 MWh is not positive (the plant consumed at least as much as it produced over the year)
Ownership
2 companies3| Company | Role | Share | As of | Source |
|---|---|---|---|---|
| California Dept. of Water Resources | Operator | EIA-860M | ||
| U S Bureau of Reclamation | Owner | 45.0% | Dec 31, 2025 | EIA-860 |
| California Dept. of Water Resources | Owner | 55.0% | Dec 31, 2025 | EIA-860 |
Timeline
- In service · EIA-860M
Sources
5 sourcesSources EIA-860M · GEM · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules
Sources
- EIA-860M
- GEMGlobal Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules
Around this plant
Nearby
within 15 mi| Project | Kind | Away | MW |
|---|---|---|---|
| Gonzaga Ridge Wind Farm × 3 units Under construction | Wind | 2.9 mi | 132.8 |
| Gonzaga Ridge Battery Facility Under construction | Storage | 6.4 mi | 51.8 |
| Stellar Wright BESS Under construction | Storage | 7.6 mi | 84.8 |
| Merced BESS Under construction | Storage | 12.3 mi | 3 |
Sources EIA-860M