Santa Maria EPGRetired
San Luis Obispo County, California · EIA plant ID 56284 · Operator: Phillips 66 Company
×6 MW natural gas retired since 2020 (latest Dec 2022)
Nameplate—MWSummer — MW
Generators0in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online—
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), primary-fuel 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) |
|---|---|---|---|
| 2004 | 28.8 | 59.6% | 19,891 |
| 2005 | 27.3 | 56.7% | 20,901 |
| 2006 | 25.7 | 53.4% | 20,292 |
| 2007 | 29.3 | 60.9% | 16,462 |
| 2008 | 23.9 | 49.6% | 27,304 |
| 2009 | 20.7 | 43.0% | 24,167 |
| 2010 | 24.4 | 50.6% | 13,538 |
| 2011 | 21.6 | 44.7% | 12,855 |
| 2012 | 24.9 | 51.5% | 18,232 |
| 2013 | 23.2 | 50.0% | 17,307 |
| 2014 | 25.3 | 54.6% | 17,864 |
| 2015 | 18.4 | 39.7% | 19,078 |
| 2016 | 16 | 34.4% | 18,929 |
| 2017 | 8.9 | 19.2% | 20,630 |
| 2018 | 1.3 | 2.7% | 22,584 |
| 2019 | 4.3 | 9.3% | 22,894 |
| 2020 | 7.7 | 16.6% | 25,352 |
| 2021 | 1 | 2.2% | 25,189 |
| 2022 | 0 | 0.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| EPG | Other Gases | ST | 5.5 | 5.3 | Dec 1995 | Retired Dec 2022 | — | coming soon |
Owner / operator
Operator: Phillips 66 Company. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Nearby plants
Within 80 km.
| Thomas M Knott Cogen Facility | 1 MW | 16.1 km |
| Cold Canyon 1 | 2 MW | 16.6 km |
| Caballero | 100 MW | 17.1 km |
| Santa Maria LFG Power Plant | 1 MW | 22.5 km |
| Industrial Parkway Storage | — | 22.8 km |
| J&A-Santa Maria II LLC | 1 MW | 25.5 km |