Angus Anson
Angus Anson is a natural gas plant in Minnehaha County, South Dakota, operated by Northern States Power Co - Minnesota. It ranks fourth by nameplate capacity among South Dakota’s 54 power plants. It is the biggest of South Dakota’s 11 natural gas plants. The operator has reported planned retirement dates for 406 MW of it, between 2029 and 2040. Two units here can switch between natural gas and oil.
Nameplate capacity, 2025
406 MW
343 MW net summer capacity
3 operable units
- Gas combustion turbine406 MW100%
Unit by unit, 1994 to 2025
operating in 2025reported planned retirementbar height follows unit size
Unit 1 Gas combustion turbine, 120 MW, 1994
Unit 2 Gas combustion turbine, 120 MW, 1994
Unit 4 Gas combustion turbine, 166 MW, 2005
Among South Dakota’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Oahe786 MW
- 2Big Bend Dam538 MW
- 3Big Stone451 MW
- 4Angus Ansonthis plant
- 5Astoria Station349 MW
- 6Deer Creek Station324 MW
Other rankings
- All US power plants
- 843rd of 14,286
- US natural gas plants
- 517th of 1,961
- Plants in the MISO (Midcontinent) balancing area
- 130th of 2,383
- Plants run by Northern States Power Co - Minnesota
- 8th of 51
- Biggest single unit, among South Dakota’s plants
- 14th of 54
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Gas combustion turbine | 120 MW | 97 MW | 1994 | Operating, retirement planned for 2040 |
| 2 | Gas combustion turbine | 120 MW | 99 MW | 1994 | Operating, retirement planned for 2040 |
| 4 | Gas combustion turbine | 166 MW | 147 MW | 2005 | Operating, retirement planned for 2029 |
Grid and site
- Balancing area
- MISO (Midcontinent)
- Reliability region
- Midwest Reliability Organization
- Highest grid connection voltage
- 115 kV
- Nearest town on record
- Sioux Falls
- Operator type
- Utility
- Coordinates
- 43.603°N, 96.636°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Walleye Wind | Wind | 110 MW | 12.5 mi east |
| Minwind | Wind | 3.8 MW | 16.9 mi east |
| Rock County Wind Fuel, LLC | Wind | 5 MW | 18.8 mi east |
| Luverne | Oil and petroleum | 9.7 MW | 22.0 mi east |
| Prairie Rose Wind Farm | Wind | 200 MW | 22.1 mi northeast |
| POET Biorefining - Chancellor | Biomass and waste | 5.4 MW | 22.9 mi southwest |
| Rock Rapids | Oil and petroleum | 2.5 MW | 26.3 mi southeast |
| Uilk Wind LLC | Wind | 4.5 MW | 28.1 mi north |