Beardsley
Tuolumne County, California · EIA plant ID 414 · Operator: Oakdale&South San Joaquin Irrigation D.
Nameplate10MWSummer 11 MW
Generators1in service
Net generation56GWh12 mo to Dec 2025
Capacity factor58%hydro units, summer MW
Heat rate—thermal plants only
First online1957
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), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
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 | 29.4 | 30.6% | — |
| 2002 | 55.9 | 63.8% | — |
| 2003 | 49.4 | 56.4% | — |
| 2004 | 44 | 55.7% | — |
| 2005 | 48.7 | 55.6% | — |
| 2006 | 83.1 | 94.9% | — |
| 2007 | 27.6 | 31.4% | — |
| 2008 | 37.2 | 42.4% | — |
| 2009 | 59.8 | 68.2% | — |
| 2010 | 54.8 | 62.5% | — |
| 2011 | 77.5 | 88.5% | — |
| 2012 | 33.7 | 34.9% | — |
| 2013 | 34.6 | 35.9% | — |
| 2014 | 15.2 | 15.8% | — |
| 2015 | 18.7 | 19.4% | — |
| 2016 | 68.4 | 70.8% | — |
| 2017 | 84.3 | 87.4% | — |
| 2018 | 53.5 | 55.5% | — |
| 2019 | 68.2 | 70.8% | — |
| 2020 | 36.5 | 37.8% | — |
| 2021 | 25.1 | 26.1% | — |
| 2022 | 44.9 | 46.6% | — |
| 2023 | 82.7 | 85.8% | — |
| 2024 | 55.7 | 57.7% | — |
| 2025 | 56.4 | 58.5% | — |
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 | Conventional Hydroelectric | HY | 10 | 11 | May 1957 | Operating | — | coming soon |
Owner / operator
Operator: Oakdale&South San Joaquin Irrigation D.. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Oakdale&South San Joaquin Irrigation D. | 100.0% | 10 MW |
Nearby plants
Within 80 km.
| Spring Gap | 6 MW | 3.5 km |
| Donnells | 72 MW | 6.2 km |
| Sand Bar Power Plant | 16 MW | 6.6 km |
| Spicer Meadow Project | 6 MW | 22 km |
| Stanislaus | 82 MW | 26.6 km |
| Collierville Powerhouse | 253 MW | 27.3 km |