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882 MW Natural Gas operating in Marion, TX — Southwest Power Pool
882 MW
Nameplate Capacity
3
Generators
units
Natural Gas Steam Turbine
Technology
1964
Operating Since
Coordinates
32.8482, -94.5480
County
Marion, TX
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Southwestern Electric Power Co | Southwestern Electric Power | — |
| Owner(s) | Southwestern Electric Power Co | American Electric Power Company | — |
| Status | Operating | — | — |
Frank M. Wilkes Power Plant is an 879 megawatt (MW), natural gas power plant located northwest of Jefferson, Texas in Marion County, Texas. The plant began operations in 1964.
Read more on WikipediaThe Wilkes power plant, located in Marion County, Texas, has a total capacity of 882 MW. The plant began operating in 1964 and utilizes natural gas as its primary fuel, powering steam turbine technology across its three generators. It is owned by American Electric Power Company and operated by Southwestern Electric Power Co. Wilkes is ranked as the 36th largest power plant in Texas out of 144, and 215th nationally out of 945 plants.
In the most recent year with available data, Wilkes generated 1,190,338 MWh, achieving a capacity factor of 15.3%. 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 $115.09 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
345.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
51.3K MWh
Latest Month
1.2M MWh
Annual Generation
15.3%
Capacity Factor
CO₂ Intensity
1316 lb/MWh
NOx
2 lb/MWh
SO₂
0.007 lb/MWh
CH₄
0.025 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
14.4%
Annual Net Gen
1115 GWh
CO₂eq
1317 lb/MWh
Subregion
SPP South
Steam turbine · Southwestern Electric Power Company · Data from 2015–2024
$172/kW
Installed Cost
$-153/kW
Annual CapEx
$45.2/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Market Position
ISO/RTO Market
SPP
LMP Node
CSWWILKES2
Pricing Hub
SPP South Hub
Location Type
Settlement Location
Node Source
Curated node match
Last updated 2026-04-09
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