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647.4 MW Natural Gas operating in Posey, IN
647.4 MW
Nameplate Capacity
4
Generators
units
Natural Gas Fired Combustion Turbine
Technology
1991
Operating Since
Coordinates
37.9053, -87.7150
County
Posey, IN
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Southern Indiana Gas & Elec Co | — | — |
| Owner(s) | Southern Indiana Gas & Elec Co | — | — |
| Status | Operating | — | — |
The A. B. Brown Generating Station is a four-unit, 700 megawatt (MW) power plant, located on the northern bank of Ohio River, 8 miles (10 km) east of Mount Vernon, Indiana and 5 miles (8 km) southwest of Evansville, Indiana just west of the Posey-Vanderburgh County Line. Each of the two coal-fired units has a name-plate capacity of 265.2 MW. Bituminous coal is used as the primary fuel type, which can be substituted for natural gas. There are also two gas turbine units, 88.2 MW of nameplate capacity each. The facility is owned by Centerpoint Energy. Vectren announced a plan to retire the plant in 2023 and replace it with a natural gas power plant; however, this plan needs to be approved by the Indiana Utility Regulatory Commission.
Read more on WikipediaThe A B Brown power plant is located in Posey County, Indiana. The plant, which began operating in 1991, has a total capacity of 673 MW across four natural gas-fired combustion turbine generators. Southern Indiana Gas & Electric Co. operates the facility, which is interconnected to the Midcontinent Independent Transmission System Operator (MISO) balancing authority within the ReliabilityFirst Corporation (RFC) NERC region. A B Brown ranks as the 5th largest power plant in Indiana out of 20, and 344th nationally out of 945 plants.
In the most recent year with available data, the plant generated 497,391 MWh, achieving a capacity factor of 8.4%. Financial data indicates an installed cost of $455.35 per kW, based on FERC filings. The plant has been the subject of 10 news articles, covering industry trends, regulatory matters, and deals.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
RFC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
138.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
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.
26.3K MWh
Latest Month
497.4K MWh
Annual Generation
8.4%
Capacity Factor
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CO₂ Intensity
2431 lb/MWh
NOx
1 lb/MWh
SO₂
3 lb/MWh
CH₄
0.277 lb/MWh
N₂O
0.040 lb/MWh
Capacity Factor
28.8%
Annual Net Gen
1783 GWh
CO₂eq
2450 lb/MWh
Subregion
RFC West
Steam turbine · Southern Indiana Gas and Electric Company · Data from 2024
$455/kW
Installed Cost
$0.0/MWh
Operating Cost
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market Position
ISO/RTO Market
MISO
LMP Node
SIGE.10ABGTGT
Pricing Hub
INDIANA.HUB
Location Type
Generation Node
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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