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725.9 MW Sub. Coal operating in Wapello, IA — Midcontinent Independent Transmission System Operator, Inc..
725.9 MW
Nameplate Capacity
1
Generators
unit
Conventional Steam Coal
Technology
1981
Operating Since
Coordinates
41.0961, -92.5558
County
Wapello, IA
Nearby Plants
| 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 | — | — |
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
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
161.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
275.5K MWh
Latest Month
2.8M MWh
Annual Generation
44.6%
Capacity Factor
CO₂ Intensity
2392 lb/MWh
NOx
0.639 lb/MWh
SO₂
0.647 lb/MWh
CH₄
0.268 lb/MWh
N₂O
0.039 lb/MWh
Capacity Factor
49.4%
Annual Net Gen
3141 GWh
CO₂eq
2410 lb/MWh
Subregion
MRO West
Steam turbine · Interstate Power and Light Company · Data from 2015–2024
$1,740/kW
Installed Cost
$-7/kW
Annual CapEx
$34.2/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Market Position
ISO/RTO Market
MISO
LMP Node
ALTW.OTTUMW1
Pricing Hub
MINN.HUB
Alt. Hub / Zone
ILLINOIS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-03-26
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