THUMS
Los Angeles County, California · EIA plant ID 56051 · Operator: THUMS Long Beach Company
Nameplate57MWSummer 45 MW
Generators1in service
Net generation156GWh12 mo to Aug 2026
Capacity factor39%gas/coal/oil units, summer MW
Heat rate13,954Btu/kWhfossil units, electric fuel, HHV
First online2003Runs as baseload
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), gas/coal/oil 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) |
|---|---|---|---|
| 2003 | 329.9 | 78.5% | 9,303 |
| 2004 | 186.2 | 47.1% | 9,963 |
| 2005 | 317.5 | 80.5% | 10,740 |
| 2006 | 387.5 | 98.3% | 10,362 |
| 2007 | 382.7 | 97.1% | 9,070 |
| 2008 | 380 | 96.1% | 10,588 |
| 2009 | 380 | 96.4% | 10,357 |
| 2010 | 355.7 | 90.2% | 9,972 |
| 2011 | 367.6 | 93.3% | 9,957 |
| 2012 | 347.4 | 87.9% | 9,923 |
| 2013 | 316.9 | 80.4% | 10,231 |
| 2014 | 301.9 | 76.6% | 10,297 |
| 2015 | 378 | 95.9% | 10,207 |
| 2016 | 379.2 | 95.9% | 10,230 |
| 2017 | 368.9 | 93.6% | 10,422 |
| 2018 | 349.7 | 88.7% | 10,479 |
| 2019 | 309 | 78.4% | 10,434 |
| 2020 | 356.5 | 90.2% | 10,645 |
| 2021 | 299.4 | 75.9% | 10,822 |
| 2022 | 172.7 | 43.8% | 11,096 |
| 2023 | 286 | 72.6% | 10,908 |
| 2024 | 348.7 | 88.2% | 10,681 |
| 2025 | 168.2 | 42.7% | 13,245 |
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 | Natural Gas Fired Combustion Turbine | GT | 57.4 | 45 | Jan 2003 | Operating | — | coming soon |
Owner / operator
Operator: THUMS Long Beach Company. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| THUMS Long Beach Company | 100.0% | 57 MW |
Nearby plants
Within 80 km.
| Elevate Pier S | — | 1 km |
| Long Beach Generation LLC | 252 MW | 1.1 km |
| Cathode (Hinson) BESS | 200 MW | 1.6 km |
| Toyota Long Beach Trigen | 3 MW | 1.6 km |
| Tesoro Wilmington Calciner | retired | 1.6 km |
| Harbor Cogen | 107 MW | 1.8 km |