Gila River Power Station
Maricopa County, Arizona · EIA plant ID 55306 · Operator: Salt River Project
Nameplate619MWSummer 570 MW
Generators3in service
Net generation2,188GWh12 mo to Aug 2026
Capacity factor22%gas/coal/oil units, summer MW
Heat rate7,353Btu/kWhfossil units, electric fuel, HHV
First online2003Runs as intermediate
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 | 2,154.5 | 20.3% | 12,100 |
| 2004 | 4,288.1 | 23.7% | 11,812 |
| 2005 | 4,547 | 25.2% | 7,389 |
| 2006 | 5,559.3 | 30.8% | 7,331 |
| 2007 | 7,251.2 | 40.2% | 6,983 |
| 2008 | 7,583.3 | 41.9% | 7,274 |
| 2009 | 6,386.1 | 35.4% | 7,531 |
| 2010 | 5,884.5 | 32.6% | 7,416 |
| 2011 | 3,233.3 | 17.9% | 7,551 |
| 2012 | 3,929.3 | 21.7% | 7,458 |
| 2013 | 4,119.9 | 45.7% | 7,428 |
| 2014 | 2,567 | 56.9% | 7,442 |
| 2015 | 1,980.6 | 43.9% | 7,873 |
| 2016 | 2,841.2 | 62.8% | 7,402 |
| 2017 | 1,154.4 | 25.6% | 7,603 |
| 2018 | 2,450.9 | 54.3% | 7,365 |
| 2019 | 1,072 | 23.8% | 7,602 |
| 2020 | 2,486.6 | 55.0% | 7,329 |
| 2021 | 2,551.7 | 56.6% | 7,284 |
| 2022 | 2,641.3 | 52.9% | 7,367 |
| 2023 | 2,015.7 | 40.4% | 7,265 |
| 2024 | 2,907 | 58.1% | 7,117 |
| 2025 | 2,671.2 | 53.5% | 7,302 |
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 |
|---|---|---|---|---|---|---|---|---|
| CTG7 | Natural Gas Fired Combined Cycle | CT | 174 | 164 | May 2003 | Operating | — | coming soon |
| CTG8 | Natural Gas Fired Combined Cycle | CT | 174 | 164 | May 2003 | Operating | — | coming soon |
| ST12 | Natural Gas Fired Combined Cycle | CA | 271 | 242 | Jun 2003 | Operating | — | coming soon |
| CTG1 | — | CT | 174 | 146 | Jul 2003 | not_current | — | coming soon |
| CTG2 | — | CT | 174 | 146 | Jul 2003 | not_current | — | coming soon |
| CTG3 | — | CT | 174 | 146 | Jun 2003 | not_current | — | coming soon |
| CTG4 | — | CT | 174 | 146 | Jun 2003 | not_current | — | coming soon |
| CTG5 | — | CT | — | — | Jun 2003 | not_current | — | coming soon |
| CTG6 | — | CT | — | — | Jun 2003 | not_current | — | coming soon |
| ST10 | — | CA | — | — | Jul 2003 | not_current | — | coming soon |
| ST11 | — | CA | — | — | Jun 2003 | not_current | — | coming soon |
| ST9 | — | CA | — | — | May 2003 | not_current | — | coming soon |
Owner / operator
Operator: Salt River Project. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Salt River Project | 100.0% | 619 MW |
Nearby plants
Within 80 km.
| Gila River Power Block 3 | 619 MW | 0 km |
| Gila River Power Block 1 | 619 MW | 0 km |
| Gila River Power Block 2 | 619 MW | 0 km |
| Paloma Solar Hybrid | 34 MW | 6 km |
| RE Gillespie 1 LLC | 15 MW | 6.3 km |
| Cotton Center Solar Hybrid | 34 MW | 7.3 km |