Mesquite Generating Station Block 2
Maricopa County, Arizona · EIA plant ID 55481 · Operator: Mesquite Power LLC
Nameplate692MWSummer 624 MW
Generators3in service
Net generation3,777GWh12 mo to Aug 2026
Capacity factor47%gas/coal/oil units, summer MW
Heat rate7,414Btu/kWhfossil units, electric fuel, HHV
First online2003Runs 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) |
|---|---|---|---|
| 2003 | 295.3 | 9.4% | 11,613 |
| 2004 | 6,094.9 | 64.6% | 7,389 |
| 2005 | 6,857.8 | 72.9% | 7,567 |
| 2006 | 7,048.7 | 75.0% | 7,687 |
| 2007 | 7,866.7 | 83.7% | 7,189 |
| 2008 | 8,075.9 | 85.7% | 7,083 |
| 2009 | 7,399.9 | 78.7% | 7,348 |
| 2010 | 7,602 | 80.8% | 7,383 |
| 2011 | 6,027 | 64.1% | 7,815 |
| 2012 | 5,813.2 | 61.7% | 7,259 |
| 2013 | 4,343 | 92.2% | 7,115 |
| 2014 | 3,393.1 | 65.1% | 7,285 |
| 2015 | 3,290.7 | 63.1% | 7,399 |
| 2016 | 2,507.7 | 48.0% | 7,420 |
| 2017 | 2,961.6 | 56.8% | 7,466 |
| 2018 | 3,476.7 | 66.7% | 7,126 |
| 2019 | 3,414.7 | 62.5% | 7,305 |
| 2020 | 3,916 | 71.4% | 7,277 |
| 2021 | 3,414.4 | 62.5% | 7,266 |
| 2022 | 3,767.5 | 68.9% | 7,303 |
| 2023 | 4,016.7 | 73.5% | 7,378 |
| 2024 | 3,418.5 | 62.4% | 7,347 |
| 2025 | 3,951.4 | 72.3% | 7,277 |
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 |
|---|---|---|---|---|---|---|---|---|
| GT3 | Natural Gas Fired Combined Cycle | CT | 185.3 | 162 | Dec 2003 | Operating | — | coming soon |
| GT4 | Natural Gas Fired Combined Cycle | CT | 185.3 | 162 | Dec 2003 | Operating | — | coming soon |
| ST2 | Natural Gas Fired Combined Cycle | CA | 321 | 300 | Dec 2003 | Operating | — | coming soon |
| GT1 | — | CT | 185.3 | 146.2 | Jun 2003 | not_current | — | coming soon |
| GT2 | — | CT | 185.3 | 144.5 | Jun 2003 | not_current | — | coming soon |
| ST1 | — | CA | — | — | Jun 2003 | not_current | — | coming soon |
Owner / operator
Operator: Mesquite Power LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Mesquite Power LLC | 100.0% | 692 MW |
Nearby plants
Within 80 km.
| Mesquite Generating Station Block 1 | 692 MW | 0 km |
| Arlington Valley Energy Facility | 713 MW | 2.4 km |
| Red Hawk | 1,127 MW | 2.5 km |
| Sun Streams, LLC | 160 MW | 2.8 km |
| Arlington Valley Solar Energy I | 127 MW | 3 km |
| Agave | 150 MW | 3.3 km |