1st largest plant in New Mexico · 137th nationally
Four Corners is a coal power plant in New Mexico with a nameplate capacity of 1,636 MW. It generates roughly 7.4M MWh per year — enough to power about 708,086 average U.S. homes.
Its capacity factor of 52% puts it in the middle range — running steadily but not full-time. At 2112 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (1,636 MW nameplate × hours in the month). Filled bars are actual net generation reported to EIA Form 923. The gap between them is capacity factor made visible.
| Plant Name | Four Corners |
|---|---|
| Operator | Arizona Public Service Co |
| City | Fruitland |
| County | San Juan County |
| State | New Mexico |
| ZIP | 87416 |
| Coordinates | 36.69000, -108.48140 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 4 | Conventional Steam Coal | Bituminous Coal | 818 MW | Operating | 1969 |
| 5 | Conventional Steam Coal | Bituminous Coal | 818 MW | Operating | 1970 |
| 3 | Conventional Steam Coal | Bituminous Coal | 253 MW | Retired | 1964 |
| 1 | Conventional Steam Coal | Bituminous Coal | 190 MW | Retired | 1963 |
| 2 | Conventional Steam Coal | Bituminous Coal | 190 MW | Retired | 1963 |
| Owner | Location | Share |
|---|---|---|
| Arizona Public Service Co | Phoenix, AZ | 6300.0% |
| Public Service Co Of Nm | Albuquerque, NM | 1300.0% |
| Salt River Project | Phoenix, AZ | 1000.0% |
| Tucson Electric Power Co | Tucson, AZ | 700.0% |
| 4c Acquisition, Llc | Phoenix, AZ | 700.0% |
| El Paso Electric Co | El Paso, TX | 700.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| CO₂ | 7.9M metric tons |
|---|---|
| SO₂ | 1.8k metric tons |
| NOₓ | 2.6k metric tons |
| CO₂ Rate | 2112 lb/MWh |
Annual totals and CO₂ rate reported by EPA eGRID for 2023. Reference averages are approximate U.S.-wide figures from the same dataset.
| NERC Region | WECC |
|---|---|
| Balancing Authority | Arizona Public Service Company |
Coal plants burn pulverized coal to boil water and spin steam turbines. They emit substantial CO₂, SO₂, and NOₓ along with mercury and particulate matter. Modern units include scrubbers and selective catalytic reduction; older units are increasingly being retired or converted to natural gas as economics shift.