Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/57501
EIA plant 57501
Massena · Cass · IA
Rolling Hills Wind Farm
Operated by MidAmerican Energy Co
Published location
Where is Rolling Hills Wind Farm?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
41.197300, -94.774400
Open the interactive map ↗Map data © OpenStreetMap contributors
Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the IA plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
1125,218
2157,349
3195,981
4206,508
5130,722
6132,184
773,345
889,169
981,327
10174,882
11147,447
12151,586
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 125,218 |
| 2 | 157,349 |
| 3 | 195,981 |
| 4 | 206,508 |
| 5 | 130,722 |
| 6 | 132,184 |
| 7 | 73,345 |
| 8 | 89,169 |
| 9 | 81,327 |
| 10 | 174,882 |
| 11 | 147,447 |
| 12 | 151,586 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 125,218 MWh |
| 2 | 157,349 MWh |
| 3 | 195,981 MWh |
| 4 | 206,508 MWh |
| 5 | 130,722 MWh |
| 6 | 132,184 MWh |
| 7 | 73,345 MWh |
| 8 | 89,169 MWh |
| 9 | 81,327 MWh |
| 10 | 174,882 MWh |
| 11 | 147,447 MWh |
| 12 | 151,586 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| RHWF | Onshore Wind Turbine | WND | 484.2 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
57501
Sector
Electric Utility
Water source
Unavailable
Data edition
2024-final
Use this record
Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right Rolling Hills Wind Farm power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at Rolling Hills Wind Farm
Variation in the published months
Across 12 numeric monthly generation entries, 4 has the highest recorded value (206,508 MWh) and 7 the lowest (73,345 MWh). Their difference is 133,163 MWh. Missing months have not been treated as zero.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| RHWF | Onshore Wind Turbine | 484.2 | 443.2 | 443.2 | 0.1 |
EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.
Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.