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56.4 MW Natural Gas operating in Payne, OK
56.4 MW
Nameplate Capacity
3
Generators
units
Natural Gas Internal Combustion Engine
Technology
2016
Operating Since
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Stillwater Utilities Authority | Stillwater Utilities Authority | — |
| Owner(s) | Stillwater Utilities Authority | Stillwater Utilities Authority | — |
| Status | Operating | — | — |
Stillwater Energy Center is a 56.4 MW natural gas-fired power plant located in Payne County, Oklahoma. The plant began operating in 2016 and is owned and operated by Stillwater Utilities Authority. It consists of three natural gas internal combustion engine generators. The plant is located within the Southwest Power Pool (SPP) balancing authority and the Midwest Reliability Organization (MRO) NERC region.
In the most recent year of available data, Stillwater Energy Center generated 138,836 MWh of electricity, achieving a capacity factor of 28.0%. The plant ranks 28th out of 38 power plants in Oklahoma and 1080th out of 1963 plants nationally. Public sources show 11 news articles related to the plant, with coverage including industry trends, hazards, regulatory matters, and business deals.
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
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Municipal
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
10.8K MWh
Latest Month
138.8K MWh
Annual Generation
28.0%
Capacity Factor
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CO₂ Intensity
1104 lb/MWh
NOx
26 lb/MWh
SO₂
0.030 lb/MWh
CH₄
0.021 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
17.9%
Annual Net Gen
88 GWh
CO₂eq
1106 lb/MWh
Subregion
SPP South
2016
$895/kW
Est. Construction Cost
Total estimated cost: $50.5M
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Point of Interconnection
Nearest Substation
Ferguson · 69 kV
Substation Distance
< 10 km
Operator
City of Stillwater
Coord Source
OSM spatial
Market Position
ISO/RTO Market
SPP
LMP Node
GRDAFERGUS2UNSTILLWATER_EC1_RA
Pricing Hub
SPPSOUTH_HUB
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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