Winterset
Madison County, Iowa · EIA plant ID 1203 · Operator: City of Winterset - (IA)
Nameplate18MWSummer 18 MW
Generators8in service
Net generation0GWh12 mo to Dec 2025
Capacity factor0%gas/coal/oil units, summer MW
Heat rate11,152Btu/kWhfossil units, electric fuel, HHV
First online1956Runs as rarely runs
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 0.8 | 1.2% | 4,548 |
| 2002 | 0.3 | 0.3% | 13,619 |
| 2003 | 1 | 0.9% | 13,918 |
| 2004 | 0.5 | 0.4% | 17,370 |
| 2005 | 0.1 | 0.1% | 18,698 |
| 2006 | 0.2 | 0.2% | 14,849 |
| 2007 | 0.2 | 0.2% | 16,127 |
| 2008 | 0 | 0.0% | 24,146 |
| 2009 | 0.1 | 0.1% | 19,939 |
| 2010 | 0 | 0.0% | 18,081 |
| 2011 | 0 | 0.0% | 22,500 |
| 2012 | 0 | 0.0% | 19,536 |
| 2013 | 0 | 0.0% | 12,222 |
| 2014 | 0.1 | 0.1% | 15,014 |
| 2015 | 0 | 0.0% | 22,172 |
| 2016 | 0 | 0.0% | — |
| 2017 | 0.1 | 0.1% | 15,932 |
| 2018 | 0.1 | 0.0% | 17,923 |
| 2019 | 0 | 0.0% | — |
| 2020 | 0 | 0.0% | 14,282 |
| 2021 | 0.1 | 0.1% | 15,651 |
| 2022 | 0.1 | 0.0% | 13,300 |
| 2023 | 0.1 | 0.1% | 13,365 |
| 2024 | 0 | 0.0% | 17,714 |
| 2025 | 0 | 0.0% | 11,152 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 2 | Natural Gas Internal Combustion Engine | IC | 1.5 | 1.5 | Jul 1956 | Operating | — | coming soon |
| 3 | Natural Gas Internal Combustion Engine | IC | 1.7 | 1.7 | Jun 1966 | Operating | — | coming soon |
| 4 | Natural Gas Internal Combustion Engine | IC | 4.4 | 4.4 | May 1972 | Operating | — | coming soon |
| 5 | Petroleum Liquids | IC | 2 | 2 | Apr 2002 | Operating | — | coming soon |
| 6 | Petroleum Liquids | IC | 2 | 2 | Apr 2002 | Operating | — | coming soon |
| 7 | Petroleum Liquids | IC | 2 | 2 | Apr 2002 | Operating | — | coming soon |
| 8 | Petroleum Liquids | IC | 2 | 2 | Aug 2022 | Operating | — | coming soon |
| 9 | Petroleum Liquids | IC | 2 | 2 | Aug 2022 | Operating | — | coming soon |
Owner / operator
Operator: City of Winterset - (IA). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of Winterset - (IA) | 100.0% | 18 MW |
Nearby plants
Within 80 km.
| Macksburg Wind Project | 120 MW | 16.1 km |
| Arbor Hill Wind Farm | 310 MW | 22.1 km |
| Arbor Hill Solar | 25 MW | 25.4 km |
| Wind GEM | 2 MW | 31 km |
| Stuart (IA) | 3 MW | 31.4 km |
| Gilliam South | 4 MW | 31.6 km |