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17.6 MW Natural Gas Internal Combustion Engine (8 MW) + Petroleum Liquids (10 MW) operating in Madison, IA
17.6 MW
Nameplate Capacity
8
Generators
units
Hybrid (2)
Technology
Natural Gas Internal Combustion Engine + Petroleum Liquids
1956
Operating Since
Coordinates
41.3372, -94.0126
County
Madison, IA
Nearby Plants
Forward-looking, asset-specific exposure analytics combining climate hazards, generation variability, and counterparty risk into a single decision-grade view. Powered by InfraRisk.
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City of Winterset - (IA) | — | — |
| Owner(s) | City of Winterset - (IA) | — | — |
| Status | Operating | — | — |
The Winterset plant is a 17.6 MW hybrid power plant located in Madison County, Iowa. It began operating in 1956 and is owned and operated by the City of Winterset (IA). The plant utilizes both natural gas internal combustion engines and petroleum liquids (DFO) as its primary fuel source, distributed across eight generators. Winterset operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the broader MRO NERC region.
In the most recent year with available data, the plant generated 35 MWh of electricity, resulting in a capacity factor of 0.0%. Winterset is ranked as the 14th largest power plant in Iowa out of 90, and nationally it is ranked 218 out of 886. Recent news coverage related to the plant includes 4 articles related to hazards and 2 articles related to the industry.
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
69.0 kV
Regulatory Status
RE — Regulated
Entity Type
Municipal
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.
3 MWh
Latest Month
35 MWh
Annual Generation
0.0%
Capacity Factor
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
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CO₂ Intensity
2183 lb/MWh
Low-utilization plant — per-MWh rate is dominated by startup/standby emissions; not directly comparable to baseload averages.
NOx
27 lb/MWh
SO₂
4 lb/MWh
CH₄
0.066 lb/MWh
N₂O
0.012 lb/MWh
Capacity Factor
0.1%
Annual Net Gen
0 GWh
CO₂eq
2188 lb/MWh
Subregion
MRO West
2013
$965/kW
Est. Construction Cost
Total estimated cost: $17.0M
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
—
Pricing Hub
MINN.HUB
Node Source
OSM spatial match
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.
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