NEIL SIMPSON II
OperatingCoal power plant
- Capacity
- 120 MW
- Primary fuel
- Coal
- County
- Campbell County
- Operator
- BLACK HILLS POWER INC
- Status
- Operating
- Commissioned
- 1995
- EIA plant ID
- 7504
- Generators
- 2
- Technology
- Conventional Steam Coal
- Net generation (2024)
- 661 GWh
- Capacity factor (2024, EIA nameplate)
- 58%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 44.2853, -105.3829
NEIL SIMPSON II, a 120 MW Coal power plant in Campbell County, Wyoming. Operated by BLACK HILLS POWER INC, commissioned 1995.
How NEIL SIMPSON II compares
With 120 MW of capacity, NEIL SIMPSON II ranks 11th among the 53 operating power plants Bywatts maps in Wyoming and 5th of the 8 operating Coal plants in the state. It accounts for about 2.6% of Wyoming's operating Coal capacity and 1.4% of all operating capacity in the state. Nationally it is the 219th-largest of the 324 operating Coal plants in the database. Commissioned in 1995, it is newer than 52% of the 53 operating Wyoming plants with a recorded commissioning year. Its operator, BLACK HILLS POWER INC, runs 5 operating plants in Wyoming totaling 459 MW. It shares Campbell County with 8 other operating plants, including DRY FORK STATION and WYODAK.
EIA-860 lists 2 generators at the site with 130 MW of nameplate capacity, mainly conventional steam coal technology. Net generation was 661 GWh in 2024 (a 58% capacity factor), about the same as in 2022. Its generators came online between 1995 and 2000.
Grid neighborhood
The nearest named substation is HUGHES (230 kV), about 9.0 miles away; the closest transmission line found within 10 miles is a 230 kV line owned by BLACK HILLS POWER, INC., under 0.1 miles away. Another 6 operating power plants totaling 1,091 MW sit within 25 miles; the largest is DRY FORK STATION (390 MW).
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
NEIL SIMPSON II is a 120 MW coal power plant in Campbell County, WY, operated by BLACK HILLS POWER INC, commissioned in 1995. Campbell County carries critical modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.9 of 5 at the 97th national percentile. Hail is the leading peril, rated Relatively High by FEMA at the 98th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a coal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Campbell County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hail | Relatively High | 98th | 4.9 of 5 | 2.2 |
| Wildfire | Relatively Moderate | 90th | 4.6 of 5 | <0.01 |
| Earthquake | Relatively Low | 80th | 4.2 of 5 | <0.01 |
| Winter weather | Relatively High | 69th | 3.8 of 5 | 15.6 |
| Lightning | Relatively Moderate | 46th | 2.9 of 5 | 38.4 |
| Tornado | Relatively Low | 30th | 2.2 of 5 | 0.82 |
| Strong wind | Relatively Low | 19th | 1.8 of 5 | 1.1 |
| Ice storm | Very Low | 18th | 1.7 of 5 | 0.01 |
| Riverine flooding | Relatively Low | 18th | 1.7 of 5 | 0.75 |
| Heat wave | Very Low | 12th | 1.5 of 5 | 0.21 |
Perils not assessed in Campbell 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 Campbell 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.