ANTELOPE VALLEY
OperatingCoal power plant
- Capacity
- 870 MW
- Primary fuel
- Coal
- County
- Mercer County
- Operator
- BASIN ELECTRIC POWER COOPERATIVE
- Status
- Operating
- Commissioned
- 1984
- EIA plant ID
- 6469
- Generators
- 2
- Technology
- Conventional Steam Coal
- Net generation (2024)
- 5,207 GWh
- Capacity factor (2024, EIA nameplate)
- 62%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 47.2814, -101.3205
ANTELOPE VALLEY, an 870 MW Coal power plant in Mercer County, North Dakota. Operated by BASIN ELECTRIC POWER COOPERATIVE, commissioned 1984.
How ANTELOPE VALLEY compares
With 870 MW of capacity, ANTELOPE VALLEY ranks 2nd among the 40 operating power plants Bywatts maps in North Dakota and 2nd of the 8 operating Coal plants in the state. It accounts for about 21% of North Dakota's operating Coal capacity and 13% of all operating capacity in the state. Nationally it is the 119th-largest of the 324 operating Coal plants in the database. Commissioned in 1984, it is older than 75% of the 40 operating North Dakota plants with a recorded commissioning year. Its operator, BASIN ELECTRIC POWER COOPERATIVE, runs 6 operating plants in North Dakota totaling 1,648 MW. It shares Mercer County with 3 other operating plants, including LELAND OLDS and GARRISON RESERVOIR AND DAM.
EIA-860 lists 2 generators at the site with 954 MW of nameplate capacity, all conventional steam coal technology. Net generation was 5,207 GWh in 2024 (a 62% capacity factor), down 12% from 2022. Its generators came online between 1984 and 1986.
Grid neighborhood
The closest transmission line found within 10 miles is a 230 kV line, under 0.1 miles away. Another 10 operating power plants totaling 4,054 MW sit within 25 miles; the largest is COAL CREEK (1,212 MW, Coal).
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
ANTELOPE VALLEY is an 870 MW coal power plant in Mercer County, ND, operated by BASIN ELECTRIC POWER COOPERATIVE, commissioned in 1984. Mercer County carries critical modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.8 of 5 at the 95th national percentile. Winter weather is the leading peril, rated Relatively Moderate 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.
Mercer County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Winter weather | Relatively Moderate | 98th | 4.9 of 5 | 18.4 |
| Hail | Relatively Moderate | 96th | 4.8 of 5 | 2.5 |
| Heat wave | Very Low | 90th | 4.6 of 5 | 1.6 |
| Ice storm | Relatively Moderate | 87th | 4.5 of 5 | 0.64 |
| Wildfire | Very Low | 66th | 3.6 of 5 | <0.01 |
| Strong wind | Relatively Low | 64th | 3.6 of 5 | 1.5 |
| Tornado | Relatively Low | 48th | 2.9 of 5 | 0.32 |
| Riverine flooding | Very Low | 40th | 2.6 of 5 | 0.43 |
| Lightning | Very Low | 36th | 2.5 of 5 | 29.7 |
| Earthquake | Very Low | 6th | 1.3 of 5 | <0.01 |
Perils not assessed in Mercer 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 Mercer 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.