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143 MW Natural Gas Fired Combustion Turbine (114 MW) + Petroleum Liquids (29 MW) operating in Brown, SD
143 MW
Nameplate Capacity
4
Generators
units
Hybrid (2)
Technology
Natural Gas Fired Combustion Turbine + Petroleum Liquids
1978
Operating Since
Coordinates
45.4299, -98.4940
County
Brown, SD
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | NorthWestern Energy - (SD) | — | — |
| Owner(s) | NorthWestern Energy - (SD) | — | — |
| Status | Operating | — | — |
The Aberdeen CT power plant, located in Brown County, South Dakota, has a total capacity of 143 MW across four generators. The plant, which began operating in 1978, is primarily fueled by natural gas, but also has the capability to use petroleum liquids. It is operated by NorthWestern Energy - (SD). Aberdeen CT is a hybrid plant utilizing Natural Gas Fired Combustion Turbine technology.
Aberdeen CT operates within the Southwest Power Pool (SPP) balancing authority and the MRO NERC region. In terms of size, it is ranked as the 5th largest power plant out of 6 in South Dakota, and 832nd nationally out of 945 plants. The plant's latest annual generation was 29,667 MWh, resulting in a capacity factor of 2.4%.
Generated from EIA, GEM, and public data sources
ISO/RTO
SPP
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
Southwest Power Pool (SWPP)
Grid Voltage
34.5 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
2.4K MWh
Latest Month
29.7K MWh
Annual Generation
2.4%
Capacity Factor
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CO₂ Intensity
1276 lb/MWh
NOx
2 lb/MWh
SO₂
0.007 lb/MWh
CH₄
0.024 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
4.1%
Annual Net Gen
40 GWh
CO₂eq
1277 lb/MWh
Subregion
MRO West
2013
$965/kW
Est. Construction Cost
Total estimated cost: $138.0M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Point of Interconnection
Nearest Substation
Aberdeen Substation
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
SPP
LMP Node
SPP
Pricing Hub
SPPNORTH_HUB
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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