FOUR CORNERS
OperatingCoal power plant
- Capacity
- 1,540 MW
- Primary fuel
- Coal
- County
- San Juan County
- Operator
- ARIZONA PUBLIC SERVICE CO
- Status
- Operating
- Commissioned
- 1969
- EIA plant ID
- 2442
- Generators
- 2
- Technology
- Conventional Steam Coal
- Net generation (2024)
- 8,493 GWh
- Capacity factor (2024, EIA nameplate)
- 59%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 36.6900, -108.4814
FOUR CORNERS, a 1,540 MW Coal power plant in San Juan County, New Mexico. Operated by ARIZONA PUBLIC SERVICE CO, commissioned 1969.
How FOUR CORNERS compares
With 1,540 MW of capacity, FOUR CORNERS is the largest of the 65 operating power plants Bywatts maps in New Mexico. It accounts for about 22% of all operating capacity in New Mexico. Nationally it is the 71st-largest of the 324 operating Coal plants in the database. Commissioned in 1969, it is older than 87% of the 63 operating New Mexico plants with a recorded commissioning year. It shares San Juan County with 2 other operating plants, BLUFFVIEW and NAVAJO DAM.
EIA-860 lists 2 generators at the site with 1,636 MW of nameplate capacity, all conventional steam coal technology. Net generation was 8,493 GWh in 2024 (a 59% capacity factor), down 18% from 2022. Its generators came online between 1969 and 1970.
Grid neighborhood
The nearest named substation is FOUR CORNERS (500 kV), about 0.3 miles away; the closest transmission line found within 10 miles is a 500 kV line owned by NAVAJO TRIBAL UTILITY AUTHORITY, about 0.1 miles away. One other operating power plant sits within 25 miles: BLUFFVIEW (67 MW, Natural Gas).
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
FOUR CORNERS is a 1,540 MW coal power plant in San Juan County, NM, operated by ARIZONA PUBLIC SERVICE CO, commissioned in 1969. San Juan County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.0 of 5 at the 1st national percentile. Riverine flooding is the leading peril, rated Relatively Moderate by FEMA at the 83rd percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a coal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
San Juan County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Riverine flooding | Relatively Moderate | 83rd | 4.3 of 5 | 1.4 |
| Earthquake | Relatively Low | 68th | 3.7 of 5 | <0.01 |
| Wildfire | Relatively Low | 63rd | 3.5 of 5 | <0.01 |
| Heat wave | Relatively Moderate | 50th | 3.0 of 5 | 1.8 |
| Winter weather | Relatively High | 25th | 2.0 of 5 | 12.4 |
| Ice storm | Relatively Low | 18th | 1.7 of 5 | 0.01 |
| Lightning | Relatively High | 10th | 1.4 of 5 | 50.2 |
| Hail | Very Low | 9th | 1.4 of 5 | 0.08 |
| Tornado | Very Low | 7th | 1.3 of 5 | 0.14 |
| Strong wind | Relatively Low | 4th | 1.2 of 5 | 0.06 |
Perils not assessed in San Juan 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 |
|---|---|
| Hurricane | FEMA rating is "Not Applicable" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for San Juan 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.