Afton Generating Station
Dona Ana County, New Mexico · EIA plant ID 55210 · Operator: Public Service Co of NM
Nameplate287MWSummer 239 MW
Generators2in service
Net generation524GWh12 mo to Aug 2026
Capacity factor25%gas/coal/oil units, summer MW
Heat rate9,996Btu/kWhfossil units, electric fuel, HHV
First online2002Runs as intermediate
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 | 14.1 | 1.1% | 11,116 |
| 2004 | 14.7 | 1.2% | 11,119 |
| 2005 | 53.2 | 4.3% | 10,851 |
| 2006 | 14.6 | 1.2% | 10,790 |
| 2007 | 81 | 5.6% | 9,999 |
| 2008 | 754.7 | 36.5% | 7,246 |
| 2009 | 668.7 | 32.4% | 7,666 |
| 2010 | 293.1 | 14.2% | 7,901 |
| 2011 | 291.4 | 14.1% | 7,978 |
| 2012 | 468.7 | 22.7% | 7,550 |
| 2013 | 699.7 | 33.9% | 7,470 |
| 2014 | 545.7 | 26.4% | 7,810 |
| 2015 | 645.7 | 31.3% | 7,959 |
| 2016 | 598.1 | 28.9% | 7,905 |
| 2017 | 402 | 19.5% | 8,194 |
| 2018 | 815.9 | 39.5% | 7,384 |
| 2019 | 878 | 42.5% | 7,691 |
| 2020 | 909.3 | 43.4% | 7,793 |
| 2021 | 629.1 | 30.1% | 8,145 |
| 2022 | 844 | 40.4% | 8,031 |
| 2023 | 1,434.5 | 68.6% | 7,596 |
| 2024 | 549.9 | 26.2% | 8,285 |
| 2025 | 460.1 | 22.0% | 9,264 |
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 | Natural Gas Fired Combined Cycle | CT | 177 | 144 | Nov 2002 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combined Cycle | CA | 110 | 94.6 | Oct 2007 | Operating | — | coming soon |
Owner / operator
Operator: Public Service Co of NM. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Public Service Co of NM | 100.0% | 287 MW |
Nearby plants
Within 80 km.
| SunE EPE2 LLC | 12 MW | 16.5 km |
| NMSU Solar and Storage | 4 MW | 21.4 km |
| Santa Teresa Solar | 150 MW | 37 km |
| Pluma - SLT Las Cruces | 5 MW | 37.1 km |
| New Mexico State University | 5 MW | 37.6 km |
| USS Jornada Solar | — | 38.5 km |