Ottumwa — Plant Summary
- EIA Plant ID
- 6254
- Capacity
- 725.9 MW
- Primary Fuel
- Coal
- Technology
- Conventional Steam Coal
- Status
- Operating
- Location
- Wapello, IA
- Operating Since
- 1981
- Generators
- 1
- Operator
- Interstate Power and Light Co
- Parent Company
- Alliant Energy
- Annual Generation
- 2,847,304 MWh
- Capacity Factor
- 44.6%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
Ottumwa
OperatingSub. Coal
Ranked #3 of 8 Sub. Coal plants in IA#49 of 103 nationally
725.9 MW Sub. Coal operating in Wapello, IA — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
725.9 MW
Nameplate Capacity
1
Generators
unit
Conventional Steam Coal
Technology
1981
Operating Since
Location
Coordinates
41.0961, -92.5558
County
Wapello, IA
Nearby Plants
- Cargill Corn Milling DivisionNatural Gas40 MW · 9.0 km
- Ottumwa City ofHydro3.2 MW · 14.8 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Interstate Power and Light Co | Interstate Power and Light | — |
| Owner(s) | Interstate Power and Light Co, MidAmerican Energy Co | Alliant Energy | — |
| Status | Operating | — | — |
Ownership Chain
About
The Ottumwa Generating Station is a 725.9 MW coal-fired power plant located in Wapello County, Iowa. The plant began operating in 1981 and has one generator utilizing conventional steam coal technology. It is owned by Alliant Energy and operated by Interstate Power and Light Co. The plant is the third-largest of 9 coal plants in Iowa, and ranks 43rd out of 75 coal plants nationally.
The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority. The latest available annual generation data indicates an output of 2,847,304 MWh, achieving a capacity factor of 44.6%. Financial data indicates an installed cost of $1315.54 per kW, based on FERC filings.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
161 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
275.5K MWh
Latest Month
2.8M MWh
Annual Generation
44.6%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: FERC Form 1HIGH
$1,740/kW
Installed Cost
$34.2/MWh
Operating Cost
Interstate Power and Light Company
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
MISO
LMP Node
ALTW.OTTUMW1
Pricing Hub
MINN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
Industry·corporate
What They’re Thinking
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