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814.4 MW Natural Gas operating in Audrain, MO — Midcontinent Independent Transmission System Operator, Inc..
814.4 MW
Nameplate Capacity
8
Generators
units
Natural Gas Fired Combustion Turbine
Technology
2001
Operating Since
Coordinates
39.3092, -91.5369
County
Audrain, MO
Nearby Plants
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Union Electric Co - (MO) | — | Ameren Missouri |
| Owner(s) | Union Electric Co - (MO) | — | — |
| Status | Operating | — | — |
Audrain Generating Station is a natural gas-fired power plant located in Audrain County, Missouri. The plant has a total capacity of 814.4 MW across 8 natural gas-fired combustion turbine generators. It began operating in 2001 and is owned and operated by Union Electric Co. (MO). Audrain Generating Station is the second-largest power plant in Missouri out of 20, and ranks 240th nationally out of 945 plants.
The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC NERC region. In the latest year of reported generation data, the plant produced 146,382 MWh, operating at a capacity factor of 2.0%. Financial data indicates an installed cost of $254.4 per kW, based on FERC filings.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
345.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
10.2K MWh
Latest Month
146.4K MWh
Annual Generation
2.0%
Capacity Factor
CO₂ Intensity
1436 lb/MWh
NOx
0.300 lb/MWh
SO₂
0.008 lb/MWh
CH₄
0.028 lb/MWh
N₂O
0.003 lb/MWh
Capacity Factor
2.8%
Annual Net Gen
196 GWh
CO₂eq
1438 lb/MWh
Subregion
SERC Midwest
Gas turbine · UNION ELECTRIC COMPANY · Data from 2015–2024
$247/kW
Installed Cost
$5/kW
Annual CapEx
$53.3/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point of Interconnection
Nearest Substation
Spencer Creek Substation · 345 kV
Substation Distance
< 10 km
Operator
Ameren
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
AMMO.AUDRN11
Pricing Hub
ILLINOIS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-03-26
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