River Hills
River Hills is a 128 MW natural gas power plant in Polk County, Iowa, operated by MidAmerican Energy Co. EIA-860M lists 8 generating units here, inside MISO. Its units entered service between 1966 and 1968.
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
- 128 MW
- 112.8 MW net summer
- Generating units
- 8
- In service
- 1966–1968
- EIA plant ID
- 1084
Where it is
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- County
- Polk County, Iowa
- Coordinates
- 41.5902, -93.6195
- Balancing authority
- MISO
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- MidAmerican Energy Co
- Primary energy source
- Natural gas
- Technologies
- Natural Gas Fired Combustion Turbine
- Status
- Operating
River Hills: FAQ
- Where is River Hills?
- In Polk 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 River Hills?
- 128 MW of nameplate capacity across 8 units, as of the EIA-860M release for 2026-07.
- Who owns River Hills?
- EIA-860M names MidAmerican Energy Co 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 River Hills LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — MidAmerican Energy Co 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 "River Hills LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is River Hills still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.