ANGUS ANSON
OperatingNatural Gas power plant
- Capacity
- 406 MW
- Primary fuel
- Natural Gas
- County
- Minnehaha County
- Operator
- NORTHERN STATES POWER CO - MINNESOTA
- Status
- Operating
- Commissioned
- 1994
- EIA plant ID
- 7237
- Coordinates
- 43.6033, -96.6375
ANGUS ANSON, a 406 MW Natural Gas power plant in Minnehaha County, South Dakota. Operated by NORTHERN STATES POWER CO - MINNESOTA, commissioned 1994.
Weather peril exposure
ANGUS ANSON is a 406 MW natural gas power plant in Minnehaha County, SD, operated by NORTHERN STATES POWER CO - MINNESOTA, commissioned in 1994. Minnehaha County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.3 of 5 at the 57th national percentile. Winter weather is the leading peril, rated Relatively High by FEMA at the 91st percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Minnehaha County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Winter weather | Relatively High | 91st | 4.6 of 5 | 17.6 |
| Tornado | Relatively High | 84th | 4.4 of 5 | 0.67 |
| Ice storm | Very High | 81st | 4.2 of 5 | 1.1 |
| Heat wave | Relatively Moderate | 77th | 4.1 of 5 | 5.6 |
| Hail | Relatively Moderate | 64th | 3.5 of 5 | 5.9 |
| Wildfire | Relatively Low | 58th | 3.3 of 5 | <0.01 |
| Riverine flooding | Relatively Moderate | 46th | 2.9 of 5 | 4.5 |
| Strong wind | Relatively High | 41st | 2.6 of 5 | 4.0 |
| Lightning | Relatively Low | 34th | 2.4 of 5 | 37.7 |
| Earthquake | Very Low | 13th | 1.5 of 5 | <0.01 |
Perils not assessed in Minnehaha 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 Minnehaha 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.