Winterset
Oil and natural gas power plant in Madison County, Iowa. 17.6 MW of nameplate capacity across 8 generators, operated by City of Winterset - (IA).
Also known as Winterset Power Plant · EIA plant 1203
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 17.6 MWOil 10.0 · Natural gas 7.6
- Generators
- 8 operatingEIA-860M, August 2026
- Operating since
- July 1956First generator online
- Operator
- City of Winterset - (IA)EIA operator ID 20835
- Grid
- MISOBalancing authority MISO
- Price nodes
- None linkedNo verified ISO node
- Location
- Madison County, IA41.3372, −94.0126
- EIA plant ID
- 1203EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Winterset produces
Free · EIA-923Net generation, 2025
33 MWh
33 MWh, final
Capacity factor, 2025
0.0%
2024: Not reported
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
2.0–115.0
MWh a year. Low 2019, high 2023
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 0 | Not reported | 12 of 12 |
| 2001 | 777 | Not reported | 12 of 12 |
| 2002 | 341 | Not reported | 12 of 12 |
| 2003 | 1,012 | Not reported | 12 of 12 |
| 2004 | 457 | Not reported | 12 of 12 |
| 2005 | 138 | Not reported | 12 of 12 |
| 2006 | 185 | Not reported | 12 of 12 |
| 2007 | 182 | Not reported | 12 of 12 |
| 2008 | 41 | Not reported | 12 of 12 |
| 2009 | 114 | Not reported | 12 of 12 |
| 2010 | 37 | 0.0% | 12 of 12 |
| 2011 | 30 | 0.0% | 12 of 12 |
| 2012 | 28 | 0.0% | 12 of 12 |
| 2013 | 27 | 0.0% | 12 of 12 |
| 2014 | 72 | 0.1% | 12 of 12 |
| 2015 | 29 | 0.0% | 12 of 12 |
| 2016 | 26 | 0.0% | 12 of 12 |
| 2017 | 103 | 0.1% | 12 of 12 |
| 2018 | 52 | 0.0% | 12 of 12 |
| 2019 | 2 | 0.0% | 12 of 12 |
| 2020 | 39 | 0.0% | 12 of 12 |
| 2021 | 83 | 0.1% | 12 of 12 |
| 2022 | 60 | Not reported | 12 of 12 |
| 2023 | 115 | 0.1% | 12 of 12 |
| 2024 | 35 | Not reported | 12 of 12 |
| 2025 | 33 | 0.0% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 2 | Natural Gas Internal Combustion Engine | 1.5 | July 1956 |
| 3 | Natural Gas Internal Combustion Engine | 1.7 | June 1966 |
| 4 | Natural Gas Internal Combustion Engine | 4.4 | May 1972 |
| 5 | Petroleum Liquids | 2.0 | April 2002 |
| 6 | Petroleum Liquids | 2.0 | April 2002 |
| 7 | Petroleum Liquids | 2.0 | April 2002 |
| 8 | Petroleum Liquids | 2.0 | August 2022 |
| 9 | Petroleum Liquids | 2.0 | August 2022 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists City of Winterset - (IA) as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
300 analyst questions a month, plus MCP
Query Winterset and 14,224 other projects from Claude or your own tools. Free accounts get 1 question a day.
Power plants near Winterset
Questions about Winterset
How much power does Winterset produce?
Winterset reported 33 MWh (33 MWh) of net generation in 2025, a 0.0% capacity factor on 17.6 MW of nameplate capacity.
Where is Winterset?
Winterset is in Madison County, Iowa, at 41.3372, −94.0126. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Winterset?
EIA-860M for August 2026 lists City of Winterset - (IA) as the operator (EIA operator ID 20835). The operator is not always the owner.
Is Winterset a oil or a natural gas plant?
Both. Oil capacity totals 10 MW and natural gas capacity totals 7.6 MW.
When did Winterset start operating?
Its first generator began operating in July 1956, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page