Emporia Energy Center
Lyon County, Kansas · EIA plant ID 56502 · Operator: Westar Energy Inc
Nameplate730MWSummer 669 MW
Generators7in service
Net generation658GWh12 mo to Aug 2026
Capacity factor11%gas/coal/oil units, summer MW
Heat rate10,921Btu/kWhfossil units, electric fuel, HHV
First online2008Runs 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) |
|---|---|---|---|
| 2008 | 198.5 | 12.0% | 10,874 |
| 2009 | 435.7 | 7.8% | 11,144 |
| 2010 | 373.3 | 6.4% | 11,032 |
| 2011 | 438.2 | 7.5% | 10,956 |
| 2012 | 545.9 | 9.4% | 10,834 |
| 2013 | 292 | 5.2% | 11,597 |
| 2014 | 271.6 | 4.8% | 11,930 |
| 2015 | 251.2 | 4.4% | 11,638 |
| 2016 | 334 | 5.9% | 11,265 |
| 2017 | 284.4 | 5.0% | 11,611 |
| 2018 | 528.1 | 9.3% | 10,995 |
| 2019 | 701.4 | 12.4% | 10,634 |
| 2020 | 386.3 | 6.7% | 11,680 |
| 2021 | 311.8 | 5.5% | 11,694 |
| 2022 | 350.8 | 6.1% | 12,370 |
| 2023 | 1,212.6 | 21.2% | 11,091 |
| 2024 | 1,548.1 | 27.0% | 10,730 |
| 2025 | 584.7 | 10.0% | 10,996 |
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 Fired Combustion Turbine | GT | 54 | 42.8 | Jun 2008 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 54 | 44.4 | Jun 2008 | Operating | — | coming soon |
| 3 | Natural Gas Fired Combustion Turbine | GT | 54 | 44.3 | Jun 2008 | Operating | — | coming soon |
| 4 | Natural Gas Fired Combustion Turbine | GT | 54 | 43.9 | Jun 2008 | Operating | — | coming soon |
| 5 | Natural Gas Fired Combustion Turbine | GT | 171.4 | 166 | Jun 2008 | Operating | — | coming soon |
| 6 | Natural Gas Fired Combustion Turbine | GT | 171.4 | 161.4 | Feb 2009 | Operating | — | coming soon |
| 7 | Natural Gas Fired Combustion Turbine | GT | 171.4 | 166 | Feb 2009 | Operating | — | coming soon |
Owner / operator
Operator: Westar Energy Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Westar Energy Inc | 100.0% | 730 MW |
Nearby plants
Within 80 km.
| Reading Wind Project | 200 MW | 9.3 km |
| Americus | 1 MW | 13.9 km |
| Thunderbird Generator (Tbird) | 1 MW | 16.6 km |
| Osage City | 15 MW | 29.3 km |
| Waverly Wind Farm LLC | 199 MW | 30.3 km |
| Osage City Solar | 2 MW | 30.8 km |