ROLLING HILLS
OperatingWind power plant
- Capacity
- 103 MW
- Primary fuel
- Wind
- County
- Converse County
- Operator
- PACIFICORP
- Status
- Operating
- Commissioned
- 2009
- EIA plant ID
- 56842
- Generators
- 1
- Technology
- Onshore Wind Turbine
- Net generation (2024)
- 245 GWh
- Capacity factor (2024, EIA nameplate)
- 24%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 43.0780, -105.8607
ROLLING HILLS, a 103 MW Wind power plant in Converse County, Wyoming. Operated by PACIFICORP, commissioned 2009.
How ROLLING HILLS compares
With 103 MW of capacity, ROLLING HILLS ranks 15th among the 53 operating power plants Bywatts maps in Wyoming and 6th of the 14 operating Wind plants in the state. It accounts for about 8.0% of Wyoming's operating Wind capacity and 1.2% of all operating capacity in the state. Nationally it is the 218th-largest of the 708 operating Wind plants in the database. Commissioned in 2009, it is newer than 79% of the 53 operating Wyoming plants with a recorded commissioning year. Its operator, PACIFICORP, runs 10 operating plants in Wyoming totaling 4,823 MW. It shares Converse County with 4 other operating plants, including DAVE JOHNSTON and TOP OF THE WORLD WINDPOWER PROJECT.
EIA-860 lists 1 generator at the site with 116 MW of nameplate capacity, all onshore wind turbine technology (this page's HIFLD capacity figure is 103 MW). Net generation was 245 GWh in 2024 (a 24% capacity factor), down 15% from 2022.
Grid neighborhood
The nearest named substation is YELLOWCAKE (230 kV), about 12.4 miles away; the closest transmission line found within 10 miles is a 230 kV line owned by PACIFICORP, under 0.1 miles away. Another 5 operating power plants totaling 1,277 MW sit within 25 miles; the largest is DAVE JOHNSTON (817 MW, Coal).
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
ROLLING HILLS is a 103 MW wind power plant in Converse County, WY, operated by PACIFICORP, commissioned in 2009. Converse County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.1 of 5 at the 53rd national percentile. Wildfire is the leading peril, rated Relatively Moderate by FEMA at the 91st 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.
Converse County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively Moderate | 91st | 4.6 of 5 | <0.01 |
| Winter weather | Relatively Moderate | 77th | 4.1 of 5 | 19.1 |
| Riverine flooding | Relatively Low | 77th | 4.1 of 5 | 0.18 |
| Earthquake | Very Low | 75th | 4.0 of 5 | <0.01 |
| Hail | Relatively Low | 62nd | 3.5 of 5 | 1.4 |
| Lightning | Relatively Low | 47th | 2.9 of 5 | 42.2 |
| Tornado | Very Low | 25th | 2.0 of 5 | 0.69 |
| Ice storm | Very Low | 24th | 2.0 of 5 | 0.02 |
| Heat wave | Very Low | 12th | 1.5 of 5 | 0.17 |
| Strong wind | Very Low | 4th | 1.2 of 5 | 0.43 |
Perils not assessed in Converse 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 Converse 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.