Rolling Hills Wind Farm
Wind power plant · Cass County, Iowa
Nameplate capacity
484 MW
Rank in Iowa
#11
of 305 plants
In service since
2011
December 2011
Details
- Primary fuel
- Wind
- Technology
- Onshore Wind Turbine
- Operator
- MidAmerican Energy Co
- County
- Cass County
- Generating units
- 1
- Share of state capacity
- 1.94%
- Rank among wind plants in Iowa
- #3 of 123
- EIA plant code
- 57501
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| RHWF | Onshore Wind Turbine | 484 MW | 443 MW | 2011 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Iowa
| Highland Wind Project (IA) | Wind | 502 MW |
| Orient Wind Farm | Wind | 501 MW |
| Beaver Creek Wind | Wind | 340 MW |
| North English | Wind | 340 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 484 MW solar plant and a 484 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Iowa power plants · What Iowa actually generates