MADDOX
OperatingNatural Gas power plant
- Capacity
- 212 MW
- Primary fuel
- Natural Gas
- County
- Lea County
- Operator
- SOUTHWESTERN PUBLIC SERVICE CO
- Status
- Operating
- Commissioned
- 1963
- EIA plant ID
- 2446
- Generators
- 3
- Technology
- Natural Gas Steam Turbine
- Net generation (2024)
- 644 GWh
- Capacity factor (2024, EIA nameplate)
- 35%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 32.7142, -103.3015
MADDOX, a 212 MW Natural Gas power plant in Lea County, New Mexico. Operated by SOUTHWESTERN PUBLIC SERVICE CO, commissioned 1963.
How MADDOX compares
With 212 MW of capacity, MADDOX ranks 9th among the 65 operating power plants Bywatts maps in New Mexico and 7th of the 16 operating Natural Gas plants in the state. It accounts for about 5.4% of New Mexico's operating Natural Gas capacity and 3.0% of all operating capacity in the state. Nationally it is the 537th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 1963, it is older than 90% of the 63 operating New Mexico plants with a recorded commissioning year. Its operator, SOUTHWESTERN PUBLIC SERVICE CO, runs 3 operating plants in New Mexico totaling 731 MW. It shares Lea County with 8 other operating plants, including HOBBS GENERATING STATION and CUNNINGHAM.
EIA-860 lists 3 generators at the site with 212 MW of nameplate capacity, mainly natural gas steam turbine technology. Net generation was 644 GWh in 2024 (a 35% capacity factor), up 91% from 2022. Its generators came online between 1963 and 1976.
Grid neighborhood
The closest transmission line found within 10 miles is a 115 kV line owned by SOUTHWEST PUBLIC SERVICE COMPANY, under 0.1 miles away. Another 6 operating power plants totaling 1,272 MW sit within 25 miles; the largest is HOBBS GENERATING STATION (658 MW, Natural Gas).
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
MADDOX is a 212 MW natural gas power plant in Lea County, NM, operated by SOUTHWESTERN PUBLIC SERVICE CO, commissioned in 1963. Lea County carries critical modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.2 of 5 at the 80th national percentile. Wildfire is the leading peril, rated Relatively High by FEMA at the 97th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Lea County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively High | 97th | 4.9 of 5 | 0.01 |
| Riverine flooding | Relatively Moderate | 92nd | 4.7 of 5 | 2.4 |
| Hail | Relatively High | 82nd | 4.3 of 5 | 2.6 |
| Winter weather | Relatively High | 81st | 4.2 of 5 | 6.4 |
| Heat wave | Relatively Low | 51st | 3.0 of 5 | 3.5 |
| Ice storm | Relatively Moderate | 42nd | 2.7 of 5 | 0.45 |
| Strong wind | Relatively Moderate | 42nd | 2.7 of 5 | 1.0 |
| Lightning | Relatively High | 38th | 2.5 of 5 | 47.5 |
| Tornado | Relatively Low | 36th | 2.4 of 5 | 1.3 |
| Hurricane | Very Low | 19th | 1.8 of 5 | <0.01 |
| Earthquake | Very Low | 12th | 1.5 of 5 | <0.01 |
Perils not assessed in Lea County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Lea County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.