MaddoxRetirement planned
Lea County, New Mexico · EIA plant ID 2446 · Operator: Southwestern Public Service Co
Nameplate212MWSummer 188 MW
Generators3in service
Net generation721GWh12 mo to Aug 2026
Capacity factor44%gas/coal/oil units, summer MW
Heat rate10,419Btu/kWhfossil units, electric fuel, HHV
First online1963Runs 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) |
|---|---|---|---|
| 2001 | 636.9 | — | — |
| 2002 | 441.7 | — | — |
| 2003 | 527 | 31.2% | 10,757 |
| 2004 | 557 | 32.9% | 10,543 |
| 2005 | 510 | 30.2% | 10,651 |
| 2006 | 634.6 | 40.5% | 11,424 |
| 2007 | 515.8 | 32.9% | 11,008 |
| 2008 | 547.9 | 34.8% | 10,625 |
| 2009 | 406.3 | 25.9% | 10,928 |
| 2010 | 439.3 | 28.0% | 11,431 |
| 2011 | 430.7 | 26.9% | 10,793 |
| 2012 | 479 | 29.8% | 10,778 |
| 2013 | 296.7 | 18.5% | 10,804 |
| 2014 | 419.2 | 26.2% | 10,992 |
| 2015 | 384.3 | 24.0% | 11,218 |
| 2016 | 320.7 | 20.0% | 11,631 |
| 2017 | 381.8 | 23.8% | 11,354 |
| 2018 | 555.2 | 34.6% | 11,580 |
| 2019 | 888.6 | 55.4% | 11,350 |
| 2020 | 610.5 | 38.0% | 11,678 |
| 2021 | 345.2 | 21.5% | 11,303 |
| 2022 | 336.9 | 21.0% | 11,369 |
| 2023 | 704.5 | 44.0% | 11,857 |
| 2024 | 643.9 | 39.0% | 10,701 |
| 2025 | 571.9 | 34.7% | 10,528 |
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 Steam Turbine | ST | 113.6 | 117 | Jan 1967 | Operating · retirement planned | Dec 2028 | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 86.9 | 61 | Jan 1976 | Operating · retirement planned | Dec 2034 | coming soon |
| 3 | Natural Gas Fired Combustion Turbine | GT | 11.5 | 10 | Jan 1963 | Operating · retirement planned | Dec 2034 | coming soon |
Owner / operator
Operator: Southwestern Public Service Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Southwestern Public Service Co | 100.0% | 212 MW |
Nearby plants
Within 80 km.
| Hobbs Generating Station | 682 MW | 1.7 km |
| AC Ranch II | — | 3.2 km |
| AC Ranch I | — | 3.2 km |
| SPS4 Monument | 10 MW | 3.6 km |
| Cunningham | 444 MW | 4.9 km |
| Cunningham Solar I & BESS | 108 MW | 8.5 km |