Arlington Valley Energy Facility
Maricopa County, Arizona · EIA plant ID 55282 · Operator: Arlington Valley LLC
Nameplate713MWSummer 580 MW
Generators3in service
Net generation3,233GWh12 mo to Aug 2026
Capacity factor64%gas/coal/oil units, summer MW
Heat rate7,393Btu/kWhfossil units, electric fuel, HHV
First online2002Runs as baseload
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) |
|---|---|---|---|
| 2002 | 673.1 | — | — |
| 2003 | 1,490.9 | 29.3% | 7,010 |
| 2004 | 1,535.3 | 30.1% | 6,979 |
| 2005 | 1,336.9 | 26.3% | 7,010 |
| 2006 | 1,644.2 | 32.4% | 7,010 |
| 2007 | 1,515.3 | 29.8% | 7,010 |
| 2008 | 1,045.9 | 20.5% | 7,218 |
| 2009 | 809.2 | 15.9% | 7,345 |
| 2010 | 1,215.9 | 24.0% | 7,187 |
| 2011 | 1,175.7 | 23.2% | 7,413 |
| 2012 | 1,734.6 | 34.1% | 7,357 |
| 2013 | 1,332.4 | 26.3% | 7,482 |
| 2014 | 1,128.8 | 22.3% | 7,494 |
| 2015 | 1,820.8 | 35.8% | 7,435 |
| 2016 | 1,885.8 | 37.0% | 7,398 |
| 2017 | 2,039.8 | 40.2% | 7,355 |
| 2018 | 2,120.5 | 41.7% | 7,335 |
| 2019 | 2,928.5 | 57.6% | 7,340 |
| 2020 | 2,111.4 | 41.4% | 7,388 |
| 2021 | 2,378 | 46.8% | 7,354 |
| 2022 | 2,721.6 | 53.6% | 7,338 |
| 2023 | 3,496.8 | 68.8% | 7,319 |
| 2024 | 3,563.3 | 69.9% | 7,403 |
| 2025 | 3,345.5 | 65.8% | 7,421 |
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 |
|---|---|---|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | CT | 198 | 162 | Jun 2002 | Operating | — | coming soon |
| CTG2 | Natural Gas Fired Combined Cycle | CT | 198 | 163 | Jun 2002 | Operating | — | coming soon |
| STG1 | Natural Gas Fired Combined Cycle | CA | 317 | 255 | Jun 2002 | Operating | — | coming soon |
Owner / operator
Operator: Arlington Valley LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Arlington Valley LLC | 100.0% | 713 MW |
Nearby plants
Within 80 km.
| Mesquite Solar 1 | 170 MW | 1.3 km |
| Mesquite Solar 2, LLC | 100 MW | 2.2 km |
| Arlington Valley Solar Energy I | 127 MW | 2.4 km |
| Mesquite Generating Station Block 2 | 692 MW | 2.4 km |
| Mesquite Generating Station Block 1 | 692 MW | 2.4 km |
| Mesquite Solar 4, LLC | 63 MW | 3.2 km |