JEFFREY ENERGY CENTER
OperatingCoal power plant
- Capacity
- 2,160 MW
- Primary fuel
- Coal
- County
- Pottawatomie County
- Operator
- WESTAR ENERGY INC
- Status
- Operating
- Commissioned
- 1978
- EIA plant ID
- 6068
- Generators
- 3
- Technology
- Conventional Steam Coal
- Net generation (2024)
- 5,399 GWh
- Capacity factor (2024, EIA nameplate)
- 28%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 39.2853, -96.1173
JEFFREY ENERGY CENTER, a 2,160 MW Coal power plant in Pottawatomie County, Kansas. Operated by WESTAR ENERGY INC, commissioned 1978.
How JEFFREY ENERGY CENTER compares
With 2,160 MW of capacity, JEFFREY ENERGY CENTER is the largest of the 115 operating power plants Bywatts maps in Kansas and the largest of the 7 operating Coal plants in the state. It accounts for about 38% of Kansas's operating Coal capacity and 16% of all operating capacity in the state. Nationally it is the 28th-largest of the 324 operating Coal plants in the database. Commissioned in 1978, it is newer than 53% of the 113 operating Kansas plants with a recorded commissioning year. Its operator, WESTAR ENERGY INC, runs 6 operating plants in Kansas totaling 4,079 MW. It shares Pottawatomie County with one other operating plant, WAMEGO.
EIA-860 lists 3 generators at the site with 2,160 MW of nameplate capacity, all conventional steam coal technology. Net generation was 5,399 GWh in 2024 (a 28% capacity factor), down 40% from 2022. Its generators came online between 1978 and 1983.
Grid neighborhood
The closest transmission line found within 10 miles is a 230 kV line owned by WESTAR ENERGY INC, under 0.1 miles away. Another 3 operating power plants totaling 39 MW sit within 25 miles; the largest is HOLTON (22 MW, Natural Gas).
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
JEFFREY ENERGY CENTER is a 2,160 MW coal power plant in Pottawatomie County, KS, operated by WESTAR ENERGY INC, commissioned in 1978. Pottawatomie County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.0 of 5 at the 50th national percentile. Heat wave is the leading peril, rated Relatively Low by FEMA at the 97th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a coal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Pottawatomie County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Heat wave | Relatively Low | 97th | 4.9 of 5 | 13.1 |
| Wildfire | Relatively Moderate | 91st | 4.6 of 5 | <0.01 |
| Tornado | Relatively Low | 79th | 4.2 of 5 | 0.73 |
| Lightning | Relatively Low | 75th | 4.0 of 5 | 49.4 |
| Winter weather | Relatively Moderate | 62nd | 3.5 of 5 | 11.8 |
| Strong wind | Relatively Low | 61st | 3.4 of 5 | 5.9 |
| Hail | Relatively Low | 56th | 3.3 of 5 | 8.8 |
| Riverine flooding | Very Low | 47th | 2.9 of 5 | 1.0 |
| Ice storm | Relatively High | 44th | 2.7 of 5 | 0.90 |
| Earthquake | Very Low | 20th | 1.8 of 5 | <0.01 |
Perils not assessed in Pottawatomie County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Hurricane | FEMA rating is "No Rating" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Pottawatomie County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.