Summit Lake
Summit Lake is a 119 MW natural gas power plant in Union County, Iowa, operated by Central Iowa Power Cooperative. EIA-860M lists 5 generating units here, inside MISO. Its units entered service between 1973 and 2021.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 118.7 MW
- 111.8 MW net summer
- Generating units
- 5
- In service
- 1973–2021
- EIA plant ID
- 1206
Where it is
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- County
- Union County, Iowa
- Coordinates
- 41.1136, -94.3472
- Balancing authority
- MISO
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Central Iowa Power Cooperative
- Primary energy source
- Natural gas
- Technologies
- Natural Gas Fired Combustion Turbine, Natural Gas Internal Combustion Engine
- Status
- Operating
Summit Lake: FAQ
- Where is Summit Lake?
- In Union County, Iowa (IA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Summit Lake?
- 119 MW of nameplate capacity across 5 units, as of the EIA-860M release for 2026-07.
- Who owns Summit Lake?
- EIA-860M names Central Iowa Power Cooperative as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Summit Lake LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Central Iowa Power Cooperative here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Summit Lake LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Summit Lake still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.