Oneta Energy Center
Wagoner County, Oklahoma · EIA plant ID 55225 · Operator: Oneta Power LLC
Nameplate1,214MWSummer 1,086 MW
Generators6in service
Net generation4,311GWh12 mo to Aug 2026
Capacity factor45%gas/coal/oil units, summer MW
Heat rate7,425Btu/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 | 238.2 | — | — |
| 2003 | 559.8 | 7.4% | 7,805 |
| 2004 | 776.5 | 8.2% | 8,057 |
| 2005 | 651.4 | 6.9% | 7,952 |
| 2006 | 1,152.9 | 12.2% | 7,589 |
| 2007 | 1,925.8 | 20.2% | 7,581 |
| 2008 | 2,216.3 | 23.2% | 7,505 |
| 2009 | 3,059.7 | 32.1% | 7,527 |
| 2010 | 2,715.9 | 28.5% | 7,515 |
| 2011 | 2,915.8 | 30.6% | 7,414 |
| 2012 | 3,321.9 | 34.8% | 7,352 |
| 2013 | 2,307.9 | 24.3% | 7,457 |
| 2014 | 2,979.5 | 31.3% | 7,478 |
| 2015 | 5,468.2 | 57.5% | 7,280 |
| 2016 | 6,149.1 | 64.4% | 7,204 |
| 2017 | 4,247.4 | 44.6% | 7,301 |
| 2018 | 4,976.7 | 52.3% | 7,274 |
| 2019 | 5,358.3 | 56.3% | 7,242 |
| 2020 | 6,334.8 | 66.4% | 7,194 |
| 2021 | 3,893.5 | 40.9% | 7,339 |
| 2022 | 4,045.6 | 42.5% | 7,405 |
| 2023 | 5,621.5 | 59.1% | 7,274 |
| 2024 | 5,647 | 59.2% | 7,237 |
| 2025 | 4,806.3 | 50.5% | 7,345 |
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 | 176 | 149.3 | Jul 2002 | Operating | — | coming soon |
| CTG2 | Natural Gas Fired Combined Cycle | CT | 176 | 149.3 | Jul 2002 | Operating | — | coming soon |
| CTG3 | Natural Gas Fired Combined Cycle | CT | 176 | 149.3 | Jun 2003 | Operating | — | coming soon |
| CTG4 | Natural Gas Fired Combined Cycle | CT | 176 | 149.3 | Jun 2003 | Operating | — | coming soon |
| STG1 | Natural Gas Fired Combined Cycle | CA | 255 | 244.6 | Jul 2002 | Operating | — | coming soon |
| STG2 | Natural Gas Fired Combined Cycle | CA | 255 | 244.6 | Jun 2003 | Operating | — | coming soon |
Owner / operator
Operator: Oneta Power LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Oneta Power LLC | 100.0% | 1,214 MW |
Nearby plants
Within 80 km.
| Green Country Energy LLC | 904 MW | 21.6 km |
| Riverside (OK) | 1,122 MW | 23.4 km |
| Tulsa | 348 MW | 28.9 km |
| Covanta Tulsa Renewable Energy LLC | 17 MW | 31.8 km |
| Huckleberry Solar | 125 MW | 38.1 km |
| Mayes County Solar | 102 MW | 39.3 km |