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2160 MW Sub. Coal operating in Pottawatomie, KS
2,160 MW
Nameplate Capacity
3
Generators
units
Conventional Steam Coal
Technology
1978
Operating Since
Coordinates
39.2865, -96.1172
County
Pottawatomie, KS
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Evergy Kansas Central, Inc | Evergy Kansas South | — |
| Owner(s) | Evergy Kansas Central, Inc, Evergy Kansas South, Inc, Evergy Missouri West | Evergy | — |
| Status | Operating | — | — |
Jeffrey Energy Center is a sub-bituminous coal-fired power plant located in Emmett Township, Pottawatomie County, seven miles (11 km) northwest of St. Marys, Kansas. Jeffrey EC is jointly owned by Westar Energy and Aquila Corp., both wholly owned subsidiaries of Evergy, Inc., Kansas City, Missouri. Jeffrey EC is composed of three separate 800-MW units providing a name-plate energy center capacity of 2.4 gigawatts. Unit 1 began operation in 1978, unit 2 in 1980 and unit 3 in 1983.
Read more on WikipediaThe Jeffrey Energy Center is a 2,160 MW coal-fired power plant located in Pottawatomie County, Kansas. It began operating in 1978 and consists of three generators utilizing conventional steam coal technology. The plant is owned and operated by Evergy, specifically Evergy Kansas Central, Inc., and is the largest of four coal plants in the state. It ranks sixth nationally out of 75 similar plants. The primary fuel source is subbituminous coal (SUB).
In the most recent year with available data, the Jeffrey Energy Center generated 8,376,257 MWh of electricity, achieving a capacity factor of 44.3%. The plant operates within the Southwest Power Pool (SPP) balancing authority and the Midwest Reliability Organization (MRO) NERC region. Financial data indicates an installed cost of $1,112.97 per kW, based on FERC filings.
Generated from EIA, GEM, and public data sources
ISO/RTO
SPP
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
Southwest Power Pool (SWPP)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Historic generation and capacity factor for this asset — the foundation for forward forecasts on the InfraSure platform.
733.9K MWh
Latest Month
8.4M MWh
Annual Generation
44.3%
Capacity Factor
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CO₂ Intensity
2292 lb/MWh
NOx
0.892 lb/MWh
SO₂
0.104 lb/MWh
CH₄
0.276 lb/MWh
N₂O
0.040 lb/MWh
Capacity Factor
30.9%
Annual Net Gen
5851 GWh
CO₂eq
2311 lb/MWh
Subregion
SPP North
Steam turbine · Westar Energy, Inc. · Data from 2015–2024
$1,219/kW
Installed Cost
$86/kW
Annual CapEx
$31.0/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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Point of Interconnection
Nearest Substation
Jeffrey Substation · 345 kV
Substation Distance
< 10 km
Operator
Evergy
Coord Source
OSM spatial
Market Position
ISO/RTO Market
SPP
LMP Node
WR.JEC.1
Pricing Hub
SPP North Hub
Location Type
Settlement Location
Node Source
EIA-860 direct report
Last updated 2026-03-26
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