Glenarm
Los Angeles County, California · EIA plant ID 422 · Operator: City of Pasadena - (CA)
Nameplate266MWSummer 222 MW
Generators6in service
Net generation130GWh12 mo to Dec 2025
Capacity factor7%gas/coal/oil units, summer MW
Heat rate13,731Btu/kWhfossil units, electric fuel, HHV
First online1976Runs as peaking
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) |
|---|---|---|---|
| 2001 | 3.9 | — | — |
| 2002 | 0.6 | — | — |
| 2003 | 0.1 | 0.0% | 21,643 |
| 2004 | 0 | 0.0% | — |
| 2005 | 27.4 | 2.0% | 12,277 |
| 2006 | 43.3 | 3.2% | 10,696 |
| 2007 | 41.7 | 3.1% | 10,498 |
| 2008 | 36 | 2.6% | 10,751 |
| 2009 | 100 | 7.4% | 11,806 |
| 2010 | 78.3 | 5.8% | 11,588 |
| 2011 | 84.3 | 6.2% | 11,832 |
| 2012 | 90 | 6.6% | 11,564 |
| 2013 | 53.6 | 4.0% | 11,613 |
| 2014 | 33.6 | 2.5% | 11,161 |
| 2015 | 32.8 | 2.5% | 10,997 |
| 2016 | 32.3 | 2.3% | — |
| 2017 | 79.2 | 3.8% | 10,772 |
| 2018 | 107.2 | 5.2% | 10,876 |
| 2019 | 65 | 3.1% | 10,086 |
| 2020 | 58.8 | 2.8% | 9,841 |
| 2021 | 18.1 | 0.9% | 12,171 |
| 2022 | 51.8 | 2.7% | 10,186 |
| 2023 | 40.9 | 2.1% | 10,874 |
| 2024 | 38.5 | 2.0% | 13,607 |
| 2025 | 129.8 | 6.7% | 13,731 |
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 |
|---|---|---|---|---|---|---|---|---|
| GT1 | Natural Gas Fired Combustion Turbine | GT | 28.8 | 22 | Jan 1976 | Operating | — | coming soon |
| GT2 | Natural Gas Fired Combustion Turbine | GT | 28.8 | 22 | Jan 1976 | Operating | — | coming soon |
| GT3 | Natural Gas Fired Combustion Turbine | GT | 60.5 | 47.2 | Jan 2004 | Operating | — | coming soon |
| GT4 | Natural Gas Fired Combustion Turbine | GT | 60.5 | 47.2 | Jan 2004 | Operating | — | coming soon |
| GT5 | Natural Gas Fired Combined Cycle | CT | 71 | 68 | Dec 2016 | Operating | — | coming soon |
| ST1 | Natural Gas Fired Combined Cycle | CA | 16 | 16 | Dec 2016 | Operating | — | coming soon |
Owner / operator
Operator: City of Pasadena - (CA). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of Pasadena - (CA) | 100.0% | 266 MW |
Nearby plants
Within 80 km.
| Glenarm BESS Plant | — | 0.2 km |
| Caltech Central | 1 MW | 2.4 km |
| CalTech - Pasadena Wilson Ave | 2 MW | 2.4 km |
| California Institute of Technology | 13 MW | 2.6 km |
| CalTech - Pasadena (PPA) | 1 MW | 3 km |
| Ratkovich Alhambra | 1 MW | 5 km |