POMEROY WIND FARM
OperatingWind power plant
- Capacity
- 286 MW
- Primary fuel
- Wind
- County
- Pocahontas County
- Operator
- MIDAMERICAN ENERGY CO
- Status
- Operating
- Commissioned
- 2007
- EIA plant ID
- 56501
- Generators
- 4
- Technology
- Onshore Wind Turbine
- Net generation (2024)
- 955 GWh
- Capacity factor (2024, EIA nameplate)
- 38%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 42.5842, -94.7467
POMEROY WIND FARM, a 286 MW Wind power plant in Pocahontas County, Iowa. Operated by MIDAMERICAN ENERGY CO, commissioned 2007.
How POMEROY WIND FARM compares
With 286 MW of capacity, POMEROY WIND FARM ranks 12th among the 198 operating power plants Bywatts maps in Iowa and 3rd of the 63 operating Wind plants in the state. It accounts for about 5.6% of Iowa's operating Wind capacity and 1.9% of all operating capacity in the state. Nationally it is the 17th-largest of the 708 operating Wind plants in the database. Commissioned in 2007, it is newer than 69% of the 198 operating Iowa plants with a recorded commissioning year. Its operator, MIDAMERICAN ENERGY CO, runs 28 operating plants in Iowa totaling 8,028 MW. It shares Pocahontas County with 3 other operating plants, including POCAHONTAS PRAIRIE WIND FARM and WEST DIESEL GENERATION UNIT.
EIA-860 lists 4 generators at the site with 286 MW of nameplate capacity, all onshore wind turbine technology. Net generation was 955 GWh in 2024 (a 38% capacity factor), down 16% from 2022. Its generators came online between 2007 and 2011.
Grid neighborhood
The closest transmission line found within 10 miles is a 161 kV line owned by MIDAMERICAN ENERGY CO, about 1.2 miles away. Another 3 operating power plants totaling 86 MW sit within 25 miles; the largest is POCAHONTAS PRAIRIE WIND FARM (80 MW, Wind).
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
POMEROY WIND FARM is a 286 MW wind power plant in Pocahontas County, IA, operated by MIDAMERICAN ENERGY CO, commissioned in 2007. Pocahontas County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.1 of 5 at the 52nd national percentile. Heat wave is the leading peril, rated Very Low by FEMA at the 98th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a wind plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Pocahontas County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Heat wave | Very Low | 98th | 4.9 of 5 | 4.5 |
| Tornado | Relatively Low | 97th | 4.9 of 5 | 0.50 |
| Strong wind | Relatively Low | 85th | 4.4 of 5 | 4.3 |
| Winter weather | Relatively Low | 82nd | 4.3 of 5 | 16.8 |
| Ice storm | Relatively Low | 64th | 3.6 of 5 | 0.69 |
| Lightning | Relatively Low | 63rd | 3.5 of 5 | 42.1 |
| Hail | Relatively Low | 56th | 3.3 of 5 | 5.2 |
| Riverine flooding | Very Low | 30th | 2.2 of 5 | 1.5 |
| Earthquake | Very Low | 14th | 1.6 of 5 | <0.01 |
| Wildfire | Very Low | 13th | 1.5 of 5 | <0.01 |
Perils not assessed in Pocahontas County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Hurricane | FEMA rating is "Not Applicable" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Pocahontas County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.