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Aberdeen CT
111 MW natural gas power plant · Brown County, South Dakota
- Operating capacity
- 111 MW
- 2 generators
- Main fuel
- Natural gas
- First unit online
- 1978
- Planned additions
- 32.0 MW
Plant details
- EIA plant ID
- 3338
- Operator
- NorthWestern Energy - (SD)
- Sector
- Electric Utility
- County
- Brown County
- Balancing authority
- SWPP
- Location
- 45.4299, -98.4940
Capacity by fuel
Operating generators
- Natural gas82.2 MW 74.1%
- Petroleum28.8 MW 25.9%
Operating generators
Nameplate capacity and the month each began operating
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| Generator | Fuel | Capacity | Online | Status |
|---|---|---|---|---|
| 2Natural Gas Fired Combustion Turbine | Natural gas | 82.2 MW | Apr 2013 | Operating |
| GT1Petroleum Liquids | Petroleum | 28.8 MW | May 1978 | Operating |
Planned generators
Expected start date as reported by the owner
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| Generator | Fuel | Capacity | Expected | Status |
|---|---|---|---|---|
| 3Natural Gas Fired Combustion Turbine | Natural gas | 16.0 MW | Oct 2026 | Under construction, more than 50 percent complete |
| 4Natural Gas Fired Combustion Turbine | Natural gas | 16.0 MW | Oct 2026 | Under construction, more than 50 percent complete |
Generation and emissions, 2023
EPA eGRID annual data
- Net generation
- 40 GWh
- Capacity factor
- 4.1%
- CO2 emissions
- 25,226 tons
- CO2 emission rate
- 1,276 lb/MWh
Nearby power plants
Within 25 miles
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| Plant | Fuel | Capacity | Distance |
|---|---|---|---|
| Groton Generation Station | Natural gas | 216 MW | 20 mi |
Frequently asked questions
- How much power can Aberdeen CT produce?
- Aberdeen CT has 111 MW of operating nameplate capacity across 2 generators as of August 2026.
- Who operates Aberdeen CT?
- EIA lists NorthWestern Energy - (SD) as the operator of Aberdeen CT.
- How much electricity did Aberdeen CT generate?
- Aberdeen CT reported 40 GWh of net generation in 2023 and 25,226 tons of carbon dioxide emissions, according to EPA eGRID.
Source: U.S. Energy Information Administration, Form EIA-860M (August 2026); U.S. EPA eGRID2023 · Data for August 2026