Winterset — Plant Summary
- EIA Plant ID
- 1203
- Capacity
- 17.6 MW
- Primary Fuel
- Oil
- Technology
- Natural Gas Internal Combustion Engine, Petroleum Liquids
- Status
- Operating
- Location
- Madison, IA
- Operating Since
- 1956
- Generators
- 8
- Operator
- City of Winterset - (IA)
- Parent Company
- —
- Annual Generation
- 35 MWh
- Capacity Factor
- 0.0%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
Winterset
OperatingDistillate OilNatural GasHybrid
Ranked #13 of 89 Distillate Oil plants in IA#177 of 827 nationally
17.6 MW Natural Gas Internal Combustion Engine (8 MW) + Petroleum Liquids (10 MW) operating in Madison, IA — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
17.6 MW
Nameplate Capacity
8
Generators
units
Hybrid (2)
Technology
Natural Gas Internal Combustion Engine + Petroleum Liquids
1956
Operating Since
Location
Coordinates
41.3372, -94.0126
County
Madison, IA
Nearby Plants
- Macksburg Wind ProjectWind119.6 MW · 18.0 km
- Arbor Hill SolarSolar25 MW · 25.9 km
- Arbor Hill Wind FarmWind310 MW · 29.2 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City of Winterset - (IA) | — | — |
| Owner(s) | City of Winterset - (IA) | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
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
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
69 kV
Regulatory Status
RE
Entity Type
Municipal
Sector
Electric Utility
Generation
3 MWh
Latest Month
35 MWh
Annual Generation
0.0%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
MISO
LMP Node
—
Pricing Hub
MINN.HUB
Node Source
OSM spatial match
Winterset SubstationSubstation
News & Articles (10)Beta
Hazards·wildfire
Red Flag Warning: Sac; Calhoun; Crawford; Carroll; Greene; Boone; Audubon; Guthrie; Dallas; Polk; Cass; Adair; Madison
Red Flag Warning issued March 21 at 9:44AM CDT until March 21 at 10:00PM CDT by NWS Des Moines IA
Red Flag Warning (hazard)
NWS Des Moines IA·5 days ago
General
Logan Lane Smith Obituary (2026) - Winterset, IA - Caldwell Parrish Funeral Home & Crematory - Winterset Chapel
Logan Smith Obituary Logan Lane Smith, 23, of Winterset, Iowa, passed away tragically on Saturday, January 10, 2026.Lane was born on January...
Legacy | Obituary·2 months ago
General
Carole Nunally Obituary (1939 - 2025) - Winterset, IA - Daily-Chronicle
Carole A. Cothern NunallyBorn: March 29, 1939 in Ramsey, Ill.Died: December 10, 2025 in Winterset, IowaCarole Adeline Cothern Nunally passed...
Legacy | Obituary·3 months ago
Industry
6 Time-Capsule Towns in Iowa
Iowa's small towns are living museums, where historic architecture, cultural traditions, and scenic backdrops blend into timeless charm.
WorldAtlas·5 months ago
Last updated 2026-03-21
View all 10 articles