Lake Mills
Oil power plant in Winnebago County, Iowa. 17.7 MW of nameplate capacity across 4 generators, operated by City of Lake Mills - (IA).
Also known as EIA plant 1154
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 17.7 MWNameplate
- Generators
- 4 operatingEIA-860M, August 2026
- Operating since
- November 1962First generator online
- Operator
- City of Lake Mills - (IA)EIA operator ID 10606
- Grid
- MISOBalancing authority MISO
- Price nodes
- None linkedNo verified ISO node
- Location
- Winnebago County, IA43.4172, −93.5322
- EIA plant ID
- 1154EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Lake Mills produces
Free · EIA-923Net generation, 2025
99 MWh
99 MWh, final
Capacity factor, 2025
0.1%
2024: 0.0%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
32.0–246.0
MWh a year. Low 2023, high 2019
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 0 | Not reported | 12 of 12 |
| 2001 | 1,253 | Not reported | 12 of 12 |
| 2002 | 465 | Not reported | 12 of 12 |
| 2003 | 765 | Not reported | 12 of 12 |
| 2004 | 922 | Not reported | 12 of 12 |
| 2005 | 366 | Not reported | 12 of 12 |
| 2006 | 467 | Not reported | 12 of 12 |
| 2007 | 963 | Not reported | 12 of 12 |
| 2008 | 34 | Not reported | 12 of 12 |
| 2009 | 68 | Not reported | 12 of 12 |
| 2010 | 73 | 0.0% | 12 of 12 |
| 2011 | 78 | 0.0% | 12 of 12 |
| 2012 | 78 | 0.0% | 12 of 12 |
| 2013 | 52 | 0.0% | 12 of 12 |
| 2014 | 52 | 0.0% | 12 of 12 |
| 2015 | 73 | 0.0% | 12 of 12 |
| 2016 | 154 | 0.1% | 12 of 12 |
| 2017 | 122 | 0.1% | 12 of 12 |
| 2018 | 88 | 0.1% | 12 of 12 |
| 2019 | 246 | 0.2% | 12 of 12 |
| 2020 | 75 | Not reported | 12 of 12 |
| 2021 | 77 | 0.1% | 12 of 12 |
| 2022 | 74 | Not reported | 12 of 12 |
| 2023 | 32 | 0.0% | 12 of 12 |
| 2024 | 38 | 0.0% | 12 of 12 |
| 2025 | 99 | 0.1% | 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 |
|---|---|---|---|
| 4 | Petroleum Liquids | 1.3 | November 1962 |
| 6 | Petroleum Liquids | 5.7 | March 1979 |
| 7 | Petroleum Liquids | 7.6 | June 1999 |
| 8 | Petroleum Liquids | 3.1 | September 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 Lake Mills - (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.
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Questions about Lake Mills
How much power does Lake Mills produce?
Lake Mills reported 99 MWh (99 MWh) of net generation in 2025, a 0.1% capacity factor on 17.7 MW of nameplate capacity.
Where is Lake Mills?
Lake Mills is in Winnebago County, Iowa, at 43.4172, −93.5322. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Lake Mills?
EIA-860M for August 2026 lists City of Lake Mills - (IA) as the operator (EIA operator ID 10606). The operator is not always the owner.
When did Lake Mills start operating?
Its first generator began operating in November 1962, 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)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page