Groton Generation Station
Natural gas power plant in Brown County, South Dakota. 216.4 MW of nameplate capacity across 2 generators, operated by Basin Electric Power Coop.
Also known as EIA plant 56238
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 216.4 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- July 2006First generator online
- Operator
- Basin Electric Power CoopEIA operator ID 1307
- Grid
- SPPBalancing authority SWPP
- Price nodes
- 2 SPP nodesResource nodes with prices
- Location
- Brown County, SD45.3735, −98.0987
- EIA plant ID
- 56238EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Groton Generation Station produces
Free · EIA-923Net generation, 2025
221 GWh
220,737 MWh, final
Capacity factor, 2025
11.6%
2024: 9.5%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
4.4–220.7
GWh a year. Low 2017, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | 28,239 | Not reported | 6 of 12 |
| 2007 | 77,953 | Not reported | 12 of 12 |
| 2008 | 89,151 | Not reported | 12 of 12 |
| 2009 | 50,149 | Not reported | 12 of 12 |
| 2010 | 44,675 | 2.7% | 12 of 12 |
| 2011 | 70,559 | 4.3% | 12 of 12 |
| 2012 | 55,325 | 3.3% | 12 of 12 |
| 2013 | 126 | 0.0% | 12 of 12 |
| 2014 | 66,097 | 4.0% | 12 of 12 |
| 2015 | 44,871 | 2.7% | 12 of 12 |
| 2016 | 102,640 | 6.2% | 12 of 12 |
| 2017 | 4,437 | 0.3% | 12 of 12 |
| 2018 | 122,106 | 7.4% | 12 of 12 |
| 2019 | 119,402 | 7.2% | 12 of 12 |
| 2020 | 118,075 | 7.1% | 12 of 12 |
| 2021 | 180,712 | Not reported | 12 of 12 |
| 2022 | 159,679 | 8.4% | 12 of 12 |
| 2023 | 201,897 | 10.7% | 12 of 12 |
| 2024 | 180,479 | 9.5% | 12 of 12 |
| 2025 | 220,737 | 11.6% | 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, 2024
93,488
US short tons. 2023: 98,464
SO₂, 2024
0
US short tons
NOx, 2024
71
US short tons
CO₂ per MWh, calculated
0.52 t
About 1,036 lb per MWh
2 of 2 EPA units reported CO₂ in 2024 (CT001, CT002), matched to EIA plant 56238 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 |
|---|---|---|---|
| GT01 | Natural Gas Fired Combustion Turbine | 108.2 | July 2006 |
| GT02 | Natural Gas Fired Combustion Turbine | 108.2 | July 2008 |
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 Basin Electric Power Coop 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 Groton Generation Station
More plants operated by Basin Electric Power Coop
Questions about Groton Generation Station
How much power does Groton Generation Station produce?
Groton Generation Station reported 220,737 MWh (221 GWh) of net generation in 2025, a 11.6% capacity factor on 216.4 MW of nameplate capacity.
Where is Groton Generation Station?
Groton Generation Station is in Brown County, South Dakota, at 45.3735, −98.0987. It is in the Southwest Power Pool balancing area (SWPP).
Who operates Groton Generation Station?
EIA-860M for August 2026 lists Basin Electric Power Coop as the operator (EIA operator ID 1307). The operator is not always the owner.
When did Groton Generation Station start operating?
Its first generator began operating in July 2006, according to EIA-860M.
Does InfraMap have power prices for Groton Generation Station?
Yes. InfraMap has SPP day-ahead and real-time prices at 2 price nodes linked to Groton Generation Station, 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
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page