Aberdeen CT
Natural gas and oil power plant in Brown County, South Dakota. 111 MW of nameplate capacity across 2 generators, operated by NorthWestern Energy - (SD).
Also known as Aberdeen CT Power Plant · EIA plant 3338
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 111 MWNatural gas 82.2 · Oil 28.8
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- May 1978First generator online
- Operator
- NorthWestern Energy - (SD)EIA operator ID 13809
- Grid
- SPPBalancing authority SWPP
- Price nodes
- 1 SPP nodeResource nodes with prices
- Location
- Brown County, SD45.4299, −98.4940
- EIA plant ID
- 3338EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Aberdeen CT produces
Free · EIA-923Net generation, 2025
56.2 GWh
56,170 MWh, final
Capacity factor, 2025
5.8%
2024: 3.0%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
7.8–58.6
GWh a year. Low 2015, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 338 | Not reported | 12 of 12 |
| 2001 | 1,299 | Not reported | 12 of 12 |
| 2002 | 293 | Not reported | 12 of 12 |
| 2003 | 866 | Not reported | 12 of 12 |
| 2004 | 59 | Not reported | 12 of 12 |
| 2005 | 159 | Not reported | 12 of 12 |
| 2006 | 112 | Not reported | 12 of 12 |
| 2007 | 97 | Not reported | 12 of 12 |
| 2008 | 1,670 | Not reported | 12 of 12 |
| 2009 | 889 | Not reported | 12 of 12 |
| 2010 | 62 | 0.0% | 12 of 12 |
| 2011 | 474 | 0.2% | 12 of 12 |
| 2012 | 242 | 0.1% | 12 of 12 |
| 2013 | 8,040 | Not reported | 12 of 12 |
| 2014 | 4,093 | 0.4% | 12 of 12 |
| 2015 | 7,759 | 0.8% | 12 of 12 |
| 2016 | 9,083 | 0.9% | 12 of 12 |
| 2017 | 10,379 | 1.1% | 12 of 12 |
| 2018 | 36,674 | 3.8% | 12 of 12 |
| 2019 | 43,908 | 4.5% | 12 of 12 |
| 2020 | 31,689 | 3.3% | 12 of 12 |
| 2021 | 51,404 | 5.3% | 12 of 12 |
| 2022 | 58,610 | 6.0% | 12 of 12 |
| 2023 | 39,552 | 4.1% | 12 of 12 |
| 2024 | 29,667 | 3.0% | 12 of 12 |
| 2025 | 56,170 | 5.8% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · SPPEmissions
Free · EPA CAMPDCO₂, 2025
45,429
US short tons. 2024: 22,997
SO₂, 2025
0
US short tons
NOx, 2025
66
US short tons
CO₂ per MWh, calculated
0.81 t
About 1,618 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (2A, 2B), matched to EIA plant 3338 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 2 | Natural Gas Fired Combustion Turbine | 82.2 | April 2013 |
| GT1 | Petroleum Liquids | 28.8 | May 1978 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists NorthWestern Energy - (SD) as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Aberdeen CT
More plants operated by NorthWestern Energy - (SD)
Questions about Aberdeen CT
How much power does Aberdeen CT produce?
Aberdeen CT reported 56,170 MWh (56.2 GWh) of net generation in 2025, a 5.8% capacity factor on 111 MW of nameplate capacity.
Where is Aberdeen CT?
Aberdeen CT is in Brown County, South Dakota, at 45.4299, −98.4940. It is in the Southwest Power Pool balancing area (SWPP).
Who operates Aberdeen CT?
EIA-860M for August 2026 lists NorthWestern Energy - (SD) as the operator (EIA operator ID 13809). The operator is not always the owner.
Is Aberdeen CT a natural gas or a oil plant?
Both. Natural gas capacity totals 82.2 MW and oil capacity totals 28.8 MW.
When did Aberdeen CT start operating?
Its first generator began operating in May 1978, according to EIA-860M.
Does InfraMap have power prices for Aberdeen CT?
Yes. InfraMap has SPP day-ahead and real-time prices at 1 price node linked to Aberdeen CT, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- SPP day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page