Summit Lake
Natural gas power plant in Union County, Iowa. 118.7 MW of nameplate capacity across 5 generators, operated by Central Iowa Power Cooperative.
Also known as Summit Lake Generating Station · EIA plant 1206
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 118.7 MWNameplate
- Generators
- 5 operatingEIA-860M, August 2026
- Operating since
- July 1973First generator online
- Operator
- Central Iowa Power CooperativeEIA operator ID 3258
- Grid
- MISOBalancing authority MISO
- Price nodes
- 2 MISO nodesResource nodes with prices
- Location
- Union County, IA41.1136, −94.3472
- EIA plant ID
- 1206EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Summit Lake produces
Free · EIA-923Net generation, 2025
109 GWh
109,300 MWh, final
Capacity factor, 2025
10.5%
2024: 6.7%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
6.4–109.3
GWh a year. Low 2015, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 19,703 | Not reported | 12 of 12 |
| 2001 | 29,710 | Not reported | 12 of 12 |
| 2002 | 24,857 | Not reported | 12 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | 14,626 | Not reported | 12 of 12 |
| 2005 | 31,682 | Not reported | 12 of 12 |
| 2006 | 14,862 | Not reported | 12 of 12 |
| 2007 | 23,039 | Not reported | 12 of 12 |
| 2008 | 322 | Not reported | 1 of 12 |
| 2009 | 70 | Not reported | 1 of 12 |
| 2010 | 26,431 | 3.6% | 12 of 12 |
| 2011 | 16,457 | 2.2% | 12 of 12 |
| 2012 | 27,318 | 3.7% | 12 of 12 |
| 2013 | 11,550 | Not reported | 12 of 12 |
| 2014 | 6,418 | Not reported | 12 of 12 |
| 2015 | 6,438 | Not reported | 12 of 12 |
| 2016 | 13,931 | 1.9% | 12 of 12 |
| 2017 | 8,706 | 1.2% | 12 of 12 |
| 2018 | 10,246 | 1.4% | 12 of 12 |
| 2019 | 6,753 | 0.9% | 12 of 12 |
| 2020 | 13,062 | 1.8% | 12 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | 70,033 | 6.7% | 12 of 12 |
| 2025 | 109,300 | 10.5% | 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 account · MISOEmissions
Free · EPA CAMPDCO₂, 2025
5,115
US short tons. 2024: 4,173
SO₂, 2025
0
US short tons
NOx, 2025
31
US short tons
CO₂ per MWh, calculated
0.05 t
About 94 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (1G, 2G), matched to EIA plant 1206 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
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 |
|---|---|---|---|
| GT1 | Natural Gas Fired Combustion Turbine | 27.0 | July 1973 |
| GT2 | Natural Gas Fired Combustion Turbine | 35.3 | June 1975 |
| R1 | Natural Gas Internal Combustion Engine | 18.8 | April 2021 |
| R2 | Natural Gas Internal Combustion Engine | 18.8 | April 2021 |
| R3 | Natural Gas Internal Combustion Engine | 18.8 | April 2021 |
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 Central Iowa Power Cooperative 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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Power plants near Summit Lake
More plants operated by Central Iowa Power Cooperative
Questions about Summit Lake
How much power does Summit Lake produce?
Summit Lake reported 109,300 MWh (109 GWh) of net generation in 2025, a 10.5% capacity factor on 118.7 MW of nameplate capacity.
Where is Summit Lake?
Summit Lake is in Union County, Iowa, at 41.1136, −94.3472. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Summit Lake?
EIA-860M for August 2026 lists Central Iowa Power Cooperative as the operator (EIA operator ID 3258). The operator is not always the owner.
When did Summit Lake start operating?
Its first generator began operating in July 1973, according to EIA-860M.
Does InfraMap have power prices for Summit Lake?
Yes. InfraMap has MISO day-ahead and real-time prices at 2 price nodes linked to Summit Lake, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
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)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- MISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page