Seminole
Seminole County, Oklahoma · EIA plant ID 2956 · Operator: Oklahoma Gas & Electric Co
Nameplate1,701MWSummer 1,522 MW
Generators3in service
Net generation2,374GWh12 mo to Aug 2026
Capacity factor19%gas/coal/oil units, summer MW
Heat rate10,942Btu/kWhfossil units, electric fuel, HHV
First online1971Runs as peaking
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) |
|---|---|---|---|
| 2001 | 3,781.4 | — | — |
| 2002 | 3,398.4 | — | — |
| 2003 | 2,882.4 | 21.4% | 11,933 |
| 2004 | 3,554.7 | 26.3% | 11,521 |
| 2005 | 3,080.7 | 22.8% | 11,464 |
| 2006 | 3,098.8 | 22.9% | 11,565 |
| 2007 | 3,531.1 | 26.1% | 11,771 |
| 2008 | 3,336 | 25.7% | 11,580 |
| 2009 | 2,888.7 | 21.9% | 11,737 |
| 2010 | 2,733.7 | 20.8% | 11,975 |
| 2011 | 3,378.5 | 25.7% | 7,819 |
| 2012 | 3,099.3 | 24.4% | 11,545 |
| 2013 | 3,107.5 | 24.1% | 11,972 |
| 2014 | 1,011 | 7.7% | 11,745 |
| 2015 | 1,569.7 | 12.5% | 11,393 |
| 2016 | 2,047.8 | 17.3% | 11,355 |
| 2017 | 976.7 | 8.5% | 11,831 |
| 2018 | 1,355.9 | 11.8% | 11,745 |
| 2019 | 1,944.1 | 16.9% | 11,018 |
| 2020 | 2,560.7 | 19.7% | 11,031 |
| 2021 | 1,359.8 | 10.5% | 11,595 |
| 2022 | 1,490.9 | 11.3% | 11,422 |
| 2023 | 2,660.6 | 20.0% | 11,105 |
| 2024 | 2,375.3 | 17.8% | 10,742 |
| 2025 | 1,991.6 | 14.9% | 11,188 |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Natural Gas Steam Turbine | ST | 567 | 500 | Mar 1971 | Operating | — | coming soon |
| 2 | Natural Gas Steam Turbine | ST | 567 | 513 | Feb 1973 | Operating | — | coming soon |
| 3 | Natural Gas Steam Turbine | ST | 567 | 508.5 | Jun 1975 | Operating | — | coming soon |
| GT1 | Natural Gas Fired Combustion Turbine | GT | 23 | — | May 1971 | Retired Dec 2015 | — | coming soon |
Owner / operator
Operator: Oklahoma Gas & Electric Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Oklahoma Gas & Electric Co | 100.0% | 1,701 MW |
Nearby plants
Within 80 km.
| People's | 5 MW | 32 km |
| Pontotoc Wind | 148 MW | 38.9 km |
| Buzzard Flop | 8 MW | 46.9 km |
| Glass Sands Wind Facility | 117 MW | 53.2 km |
| Diamond Spring, LLC | 304 MW | 53.5 km |
| Centrahoma West | 25 MW | 57.1 km |