Trinity
Trinity County, California · EIA plant ID 451 · Operator: U S Bureau of Reclamation
Nameplate140MWSummer 140 MW
Generators2in service
Net generation468GWh12 mo to Aug 2026
Capacity factor38%hydro units, summer MW
Heat rate—thermal plants only
First online1964
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), 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 | 402.1 | 32.8% | — |
| 2002 | 367.6 | 30.0% | — |
| 2003 | 557.6 | 45.5% | — |
| 2004 | 580.4 | 47.2% | — |
| 2005 | 401.8 | 32.8% | — |
| 2006 | 653.4 | 53.3% | — |
| 2007 | 364.5 | 29.7% | — |
| 2008 | 396.2 | 32.2% | — |
| 2009 | 247.7 | 20.2% | — |
| 2010 | 320.5 | 26.1% | — |
| 2011 | 455.4 | 37.1% | — |
| 2012 | 434.3 | 35.3% | — |
| 2013 | 449.9 | 36.7% | — |
| 2014 | 279.1 | 22.8% | — |
| 2015 | 195.2 | 15.9% | — |
| 2016 | 277.8 | 22.6% | — |
| 2017 | 411.2 | 33.5% | — |
| 2018 | 275.4 | 22.5% | — |
| 2019 | 270.3 | 22.0% | — |
| 2020 | 408.7 | 33.2% | — |
| 2021 | 265.2 | 21.6% | — |
| 2022 | 127.3 | 10.4% | — |
| 2023 | 201.7 | 16.4% | — |
| 2024 | 403.7 | 32.8% | — |
| 2025 | 551.4 | 45.0% | — |
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 | 70 | 70 | Feb 1964 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 70 | 70 | Feb 1964 | Operating | — | coming soon |
Owner / operator
Operator: U S Bureau of Reclamation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| U S Bureau of Reclamation | 100.0% | 140 MW |
Nearby plants
Within 80 km.
| Judge F Carr | 154 MW | 20.3 km |
| Whiskeytown | 4 MW | 29.1 km |
| Shasta | 714 MW | 30 km |
| Spring Creek | 180 MW | 31.2 km |
| Slate Creek | 4 MW | 32.6 km |
| Keswick | 117 MW | 33.7 km |