Gila River Power Block 1
Maricopa County, Arizona · EIA plant ID 59338 · Operator: Salt River Project
Nameplate619MWSummer 570 MW
Generators3in service
Net generation2,947GWh12 mo to Aug 2026
Capacity factor59%gas/coal/oil units, summer MW
Heat rate7,335Btu/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) |
|---|---|---|---|
| 2013 | 2,091.6 | 23.2% | 7,652 |
| 2014 | 1,602.5 | 17.8% | 7,392 |
| 2015 | 2,184.1 | 24.2% | 7,240 |
| 2016 | 1,681 | 37.2% | 7,523 |
| 2017 | 2.7 | 0.1% | 10,397 |
| 2018 | 1,493.2 | 33.1% | 7,297 |
| 2019 | 1,746.8 | 38.7% | 7,462 |
| 2020 | 3,165.3 | 70.0% | 7,218 |
| 2021 | 1,509.7 | 30.2% | 7,165 |
| 2022 | 2,562.5 | 51.3% | 7,234 |
| 2023 | 2,924.6 | 58.6% | 7,353 |
| 2024 | 2,109.5 | 42.1% | 7,600 |
| 2025 | 2,561 | 51.3% | 7,284 |
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 | 174 | 164 | Jul 2003 | Operating | — | coming soon |
| CTG2 | Natural Gas Fired Combined Cycle | CT | 174 | 164 | Jul 2003 | Operating | — | coming soon |
| ST9 | Natural Gas Fired Combined Cycle | CA | 271 | 242 | May 2003 | Operating | — | coming soon |
| CTG3 | — | CT | — | — | Jun 2003 | not_current | — | coming soon |
| CTG4 | — | CT | — | — | Jun 2003 | not_current | — | coming soon |
| ST10 | — | CA | — | — | Jul 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 2 | 619 MW | 0 km |
| Gila River Power Block 3 | 619 MW | 0 km |
| Gila River Power Station | 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 |