Yucca
Yuma County, Arizona · EIA plant ID 120 · Operator: Arizona Public Service Co
Nameplate422MWSummer 317 MW
Generators8in service
Net generation161GWh12 mo to Aug 2026
Capacity factor6%gas/coal/oil units, summer MW
Heat rate12,036Btu/kWhfossil units, electric fuel, HHV
First online1959Runs as peaking
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) |
|---|---|---|---|
| 2001 | 561.5 | — | — |
| 2002 | 400.6 | — | — |
| 2003 | 256.3 | 12.5% | 12,346 |
| 2004 | 256.9 | 12.5% | 12,669 |
| 2005 | 245.4 | 12.0% | 12,286 |
| 2006 | 295.5 | 14.4% | 11,564 |
| 2007 | 318.6 | 15.5% | 11,271 |
| 2008 | 325.3 | 12.8% | 11,161 |
| 2009 | 384.4 | 13.3% | 11,025 |
| 2010 | 421.7 | 14.7% | 10,821 |
| 2011 | 352.2 | 12.3% | 10,821 |
| 2012 | 266.1 | 9.2% | 11,417 |
| 2013 | 315.5 | 11.0% | 11,575 |
| 2014 | 347.5 | 12.1% | 11,520 |
| 2015 | 330.4 | 11.5% | 11,460 |
| 2016 | 360.7 | 12.5% | 11,341 |
| 2017 | 312.7 | 10.9% | 11,816 |
| 2018 | 456.8 | 15.9% | 11,226 |
| 2019 | 414 | 14.4% | 11,691 |
| 2020 | 416.8 | 14.5% | 11,256 |
| 2021 | 340.6 | 11.8% | 12,149 |
| 2022 | 293.4 | 10.2% | 11,273 |
| 2023 | 236.5 | 8.2% | 11,528 |
| 2024 | 298.5 | 10.7% | 12,592 |
| 2025 | 200.1 | 7.2% | 11,769 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo104,982 MMBtu
Last month with liquid burnAug 2026
Switch while operatingNo
Net summer MW on gas36
Net summer MW on oil36
Time gas → oilunknown (EIA UNK)
Time oil → gasup to 1 h (EIA 1H)
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 | 22.3 | 17 | Jul 1971 | Operating | — | coming soon |
| GT2 | Natural Gas Fired Combustion Turbine | GT | 22.3 | 17 | Jul 1971 | Operating | — | coming soon |
| GT21 | Petroleum Liquids | GT | 25.3 | 20 | Dec 1978 | Operating | — | coming soon |
| GT3 | Natural Gas Fired Combustion Turbine | GT | 72.4 | 50.7 | Jun 1973 | Operating | — | coming soon |
| GT4 | Petroleum Liquids | GT | 72.4 | 49.7 | Jul 1974 | Operating | — | coming soon |
| GT5 | Natural Gas Fired Combustion Turbine | GT | 60.5 | 44 | Jun 2008 | Operating | — | coming soon |
| GT6 | Natural Gas Fired Combustion Turbine | GT | 60.5 | 44 | Jun 2008 | Operating | — | coming soon |
| ST1 | Natural Gas Steam Turbine | ST | 86.7 | 75 | Apr 1959 | Operating | — | coming soon |
Owner / operator
Operator: Arizona Public Service Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Arizona Public Service Co | 73.5% | 310 MW |
| Imperial Irrigation District | 26.5% | 112 MW |
Nearby plants
Within 80 km.
| Pilot Knob | 33 MW | 1.7 km |
| Yuma Cogeneration Associates | 63 MW | 5.4 km |
| Siphon Drop Power Plant | 4 MW | 9.6 km |
| Arizona Western College PV | 5 MW | 20.4 km |
| Drop 1 | 6 MW | 21.7 km |
| ORCHARD Solar Generation and BESS | — | 21.9 km |