Jeffrey Energy Center
Pottawatomie County, Kansas · EIA plant ID 6068 · Operator: Westar Energy Inc
Nameplate2,160MWSummer 2,179 MW
Generators3in service
Net generation7,737GWh12 mo to Aug 2026
Capacity factor41%gas/coal/oil units, summer MW
Heat rate11,218Btu/kWhfossil units, electric fuel, HHV
First online1978Runs 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) |
|---|---|---|---|
| 2001 | 14,331.8 | — | — |
| 2002 | 15,330.6 | — | — |
| 2003 | 15,025.7 | 77.5% | 10,950 |
| 2004 | 13,807.3 | 71.0% | 11,058 |
| 2005 | 15,145.7 | 78.2% | 11,018 |
| 2006 | 14,264.1 | 74.4% | 10,879 |
| 2007 | 15,055 | 78.5% | 10,910 |
| 2008 | 13,383.4 | 70.2% | 11,034 |
| 2009 | 12,921.9 | 68.2% | 11,242 |
| 2010 | 13,463 | 71.0% | 11,216 |
| 2011 | 13,602.7 | 71.7% | 11,112 |
| 2012 | 11,404.5 | 59.6% | 11,201 |
| 2013 | 13,372.1 | 70.8% | 11,073 |
| 2014 | 11,466.7 | 60.7% | 11,174 |
| 2015 | 11,346.1 | 60.1% | 11,101 |
| 2016 | 9,850.7 | 52.2% | 11,031 |
| 2017 | 10,705.9 | 56.1% | 11,103 |
| 2018 | 9,498.8 | 49.5% | 11,126 |
| 2019 | 6,573.6 | 34.3% | 11,880 |
| 2020 | 6,672.2 | 37.8% | 12,013 |
| 2021 | 8,340.4 | 47.3% | 11,582 |
| 2022 | 8,976.1 | 51.0% | 11,283 |
| 2023 | 5,850.9 | 33.2% | 11,391 |
| 2024 | 5,399.3 | 28.2% | 11,575 |
| 2025 | 8,376.3 | 43.9% | 11,330 |
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 | Conventional Steam Coal | ST | 720 | 725.2 | Jul 1978 | Operating | — | coming soon |
| 2 | Conventional Steam Coal | ST | 720 | 721.8 | May 1980 | Operating | — | coming soon |
| 3 | Conventional Steam Coal | ST | 720 | 731.8 | May 1983 | 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).
| Evergy Kansas Central, Inc | 72.0% | 1,555 MW |
| Evergy Kansas South, Inc | 20.0% | 432 MW |
| Evergy Missouri West | 8.0% | 173 MW |
Nearby plants
Within 80 km.
| Public Works Generation | 3 MW | 18 km |
| Wamego | 24 MW | 19.1 km |
| St. George | 1 MW | 29.7 km |
| FreeState Kiro Solar I | 1 MW | 34.7 km |
| Waste Management Rolling Meadows LFGTE | 6 MW | 35.5 km |
| Holton | 22 MW | 39.1 km |