Audrain Generating Station — Plant Summary
- EIA Plant ID
- 55234
- Capacity
- 814.4 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combustion Turbine
- Status
- Operating
- Location
- Audrain, MO
- Operating Since
- 2001
- Generators
- 8
- Operator
- Union Electric Co - (MO)
- Parent Company
- —
- Annual Generation
- 146,382.01 MWh
- Capacity Factor
- 2.0%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- SERC
Audrain Generating Station
OperatingNatural Gas
Ranked #1 of 36 Natural Gas plants in MO#236 of 2009 nationally
814.4 MW Natural Gas operating in Audrain, MO — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
814.4 MW
Nameplate Capacity
8
Generators
units
Natural Gas Fired Combustion Turbine
Technology
2001
Operating Since
Location
Coordinates
39.3092, -91.5369
County
Audrain, MO
Nearby Plants
- Huck Finn Renewable Energy CenterSolar200 MW · 1.8 km
- Blue Jay Road Solar, LLCSolar60 MW · 8.0 km
- MJMEUC Generating Station #1Natural Gas13.3 MW · 11.0 km
Ownership & Operator
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 | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
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
Engineering & Generators
Grid Context
NERC Region
SERC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
345 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
10.2K MWh
Latest Month
146.4K MWh
Annual Generation
2.0%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Form 1HIGH
$247/kW
Installed Cost
$53.3/MWh
Operating Cost
UNION ELECTRIC COMPANY
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidencePoint 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
News & Articles (9)Beta
Grid·capacity addition
Missouri solar jumps nearly 30% with Huck Finn facility coming online
Owned by Ameren Missouri, this 200 MW solar plant is one of three solar facilities the company acquired in 2024.
Ameren Missouri (operator)
pv magazine USA·1 years ago
Grid·capacity addition
3 new Ameren solar facilities are now providing energy to Missouri customers
Ameren Missouri now produces hundreds of megawatts of new solar energy that are lighting homes and businesses across the St. Louis region.
Ameren Missouri (operator)
STLPR·1 years ago
Regulatory·state puc
Regulators approve Ameren Missouri’s Castle Bluff Energy Center
The Missouri Public Service Commission (PSC) on Wednesday greenlit the Castle Bluff Energy Center, Ameren Missouri's planned $900 million, 800-megawatt (MW)...
Missouri Public Service Commission (regulator)Ameren Missouri (developer)
Daily Energy Insider·1 years ago
Grid·capacity addition
Ameren Missouri approved to build 800 MW simple-cycle facility at former coal site
The Castle Bluff Energy Center is expected to be ready to serve as a backup source of energy in 2027, and represents an investment of...
Ameren Missouri (developer)
Power Engineering·1 years ago
Last updated 2026-03-14
View all 9 articles