Pacific-Ultrapower Chinese Station
Tuolumne County, California · EIA plant ID 50560 · Operator: IHI Power Services Corp
Nameplate25MWSummer 18 MW
Generators1in service
Net generation100GWh12 mo to Aug 2026
Capacity factor62%other units, summer MW
Heat rate16,767Btu/kWhfossil units, electric fuel, HHV
First online1986
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), other 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 110.8 | 63.9% | — |
| 2002 | 126.7 | 73.0% | — |
| 2003 | 130.4 | 75.2% | — |
| 2004 | 132.9 | 76.4% | — |
| 2005 | 132.9 | 76.6% | — |
| 2006 | 126.8 | 73.1% | — |
| 2007 | 123.2 | 71.0% | — |
| 2008 | 118.5 | 68.1% | — |
| 2009 | 128.4 | 74.0% | — |
| 2010 | 112.9 | 65.1% | — |
| 2011 | 136.3 | 78.6% | — |
| 2012 | 143.9 | 82.7% | — |
| 2013 | 128.1 | 73.9% | — |
| 2014 | 134.8 | 77.5% | 15,442 |
| 2015 | 133.8 | 76.9% | 15,574 |
| 2016 | 111 | 63.8% | — |
| 2017 | 118.6 | 75.2% | — |
| 2018 | 140.5 | 89.1% | — |
| 2019 | 134.9 | 85.5% | — |
| 2020 | 127 | 80.3% | — |
| 2021 | 132 | 83.7% | — |
| 2022 | 127.3 | 80.7% | — |
| 2023 | 132.8 | 84.2% | — |
| 2024 | 140.8 | 88.6% | 16,193 |
| 2025 | 126.2 | 79.7% | 16,150 |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Wood/Wood Waste Biomass | ST | 25 | 18 | Oct 1986 | Operating | — | coming soon |
Owner / operator
Operator: IHI Power Services Corp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Pacific Energy Resources Inc | 55.0% | 14 MW |
| CII Wood Power Inc | 45.0% | 11 MW |
Nearby plants
Within 80 km.
| Sierra Energy Storage, LLC | 10 MW | 0 km |
| Sierra Pacific Chinese Camp | 4 MW | 2.3 km |
| Sonora 1 | 2 MW | 4.8 km |
| New Melones | 300 MW | 9.2 km |
| Tulloch | 30 MW | 11.2 km |
| Moccasin Low Head Hydro Project | 3 MW | 15.9 km |