Four Corners
Coal power plant in San Juan County, New Mexico. 1,636.2 MW of nameplate capacity across 2 generators, operated by Arizona Public Service Co.
Also known as Four Corners Generating Station · EIA plant 2442
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Key facts
- Capacity
- 1,636.2 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- July 1969First generator online
- Operator
- Arizona Public Service CoEIA operator ID 803
- Grid
- AZPSBalancing authority AZPS
- Price nodes
- None linkedNo verified ISO node
- Location
- San Juan County, NM36.6900, −108.4814
- EIA plant ID
- 2442EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Four Corners produces
Free · EIA-923Net generation, 2025
8.24 TWh
8,239,233 MWh, final
Capacity factor, 2025
57.5%
2024: 59.1%
January to July 2026
5.19 TWh
Provisional
Range, 2015 to 2025
6.5–10.3
TWh a year. Low 2017, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 14,929,616 | Not reported | 12 of 12 |
| 2001 | 15,061,359 | Not reported | 12 of 12 |
| 2002 | 12,914,233 | Not reported | 12 of 12 |
| 2003 | 15,678,911 | Not reported | 12 of 12 |
| 2004 | 14,987,221 | Not reported | 12 of 12 |
| 2005 | 15,616,040 | Not reported | 12 of 12 |
| 2006 | 15,969,176 | Not reported | 12 of 12 |
| 2007 | 14,597,307 | Not reported | 12 of 12 |
| 2008 | 14,683,708 | Not reported | 12 of 12 |
| 2009 | 7,906,186 | Not reported | 6 of 12 |
| 2010 | 13,904,804 | 69.9% | 12 of 12 |
| 2011 | 14,054,456 | 70.7% | 12 of 12 |
| 2012 | 13,741,385 | Not reported | 12 of 12 |
| 2013 | 12,269,271 | Not reported | 12 of 12 |
| 2014 | 2,788,029 | 59.2% | 4 of 12 |
| 2015 | 10,172,252 | Not reported | 12 of 12 |
| 2016 | 6,873,285 | 47.8% | 12 of 12 |
| 2017 | 6,522,659 | 45.5% | 12 of 12 |
| 2018 | 7,508,845 | 52.4% | 12 of 12 |
| 2019 | 8,917,348 | 62.2% | 12 of 12 |
| 2020 | 7,598,973 | 52.9% | 12 of 12 |
| 2021 | 7,904,357 | 55.1% | 12 of 12 |
| 2022 | 10,310,265 | 71.9% | 12 of 12 |
| 2023 | 7,434,911 | Not reported | 12 of 12 |
| 2024 | 8,493,424 | 59.1% | 12 of 12 |
| 2025 | 8,239,233 | 57.5% | 12 of 12 |
| 2026 (provisional, partial year) | 5,189,567 | 62.3% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDCO₂, 2025
8.74M
US short tons. 2024: 9.11M
SO₂, 2025
1,888
US short tons
NOx, 2025
2,645
US short tons
CO₂ per MWh, calculated
1.06 t
About 2,121 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (1, 2, 3, 4, 5), matched to EIA plant 2442 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
6,093
million gallons
Consumption, 2024
5,746
million gallons
Source
SAN JUAN RIVER/MORGAN LAKE
Surface, Fresh. Recirculating with cooling pond
Watershed stress
Very low/none · 0.200
USGS SUI, HUC12 Morgan Lake-Chaco River
24 of 24 cooling months report withdrawal. SUI of the source river HUC12 within 3 km. Cooling-pond plants report water circulated through the pond as withdrawal, so withdrawal is far above consumption. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 4 | Conventional Steam Coal | 818.1 | July 1969 |
| 5 | Conventional Steam Coal | 818.1 | July 1970 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Arizona Public Service Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Four Corners
More plants operated by Arizona Public Service Co
Questions about Four Corners
How much power does Four Corners produce?
Four Corners reported 8,239,233 MWh (8.24 TWh) of net generation in 2025, a 57.5% capacity factor on 1,636.2 MW of nameplate capacity. From January to July 2026 it reported 5.19 TWh, which is provisional.
Where is Four Corners?
Four Corners is in San Juan County, New Mexico, at 36.6900, −108.4814. It is in the Arizona Public Service Company balancing area (AZPS).
Who operates Four Corners?
EIA-860M for August 2026 lists Arizona Public Service Co as the operator (EIA operator ID 803). The operator is not always the owner.
When did Four Corners start operating?
Its first generator began operating in July 1969, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page