Power plants in South Dakota

South Dakota has 54 power plants of 1 MW or more in the 2025 EIA-860 data, with 7,670 MW of nameplate capacity, the 41st-largest total among the 50 states and DC. Wind accounts for 45% of that capacity. The biggest single site is Oahe at 786 MW. Units that came online from 2020 to 2025 add 2,726 MW, led by wind at 77%.

Wind3,457 MW45%
Hydroelectric1,648 MW21%
Natural gas1,603 MW21%
Coal450 MW5.9%
Oil and petroleum289 MW3.8%
Solar217 MW2.8%
Biomass and waste5.4 MW0.1%
Battery storage0.8 MW0.0%

What is running, by the decade it came online

CoalNatural gasOil and petroleumHydroelectricWindSolarBattery storageBiomass and waste

Columns above the line show capacity still operating in 2025, stacked by fuel. Below the line: capacity retired in each decade at plants that still operate.

The 25 largest plants

Rank	Plant	Runs on	Capacity	First unit	Operator
1	Oahe	Hydroelectric	786 MW	1962	USACE-Omaha
2	Big Bend Dam	Hydroelectric	538 MW	1964	USACE-Omaha
3	Big Stone	Coal	451 MW	1975	Otter Tail Power Co
4	Angus Anson	Natural gas	406 MW	1994	Northern States Power Co - Minnesota
5	Astoria Station	Natural gas	349 MW	2021	Otter Tail Power Co
6	Deer Creek Station	Natural gas	324 MW	2012	Basin Electric Power Coop
7	Fort Randall	Hydroelectric	320 MW	1954	USACE-Omaha
8	Dakota Range Wind	Wind	304 MW	2022	Northern States Power Co - Minnesota
9	Deuel Harvest Wind Energy LLC	Wind	300 MW	2021	Southern Power Co
10	Triple H Wind Project	Wind	250 MW	2020	Engie North America
11	Prevailing Wind Park	Wind	220 MW	2020	AES Distributed Energy
12	Groton Generation Station	Natural gas	216 MW	2006	Basin Electric Power Coop
13	Buffalo Ridge II LLC	Wind	210 MW	2010	Avangrid Power LLC
14	Crowned Ridge Wind II Energy Center	Wind	201 MW	2020	Northern States Power Co - Minnesota
15	Crowned Ridge Wind Energy Center	Wind	200 MW	2019	Crowned Ridge Wind, LLC
16	Crocker Wind Farm	Wind	200 MW	2019	Geronimo Power
17	North Bend Wind Project, LLC	Wind	200 MW	2023	North Bend Wind Project, LLC
18	Sweetland Wind Farm, LLC	Wind	200 MW	2023	Sweetland Wind Farm, LLC
19	Prairie Winds SD1	Wind	162 MW	2011	Basin Electric Power Coop
20	Tatanka Ridge	Wind	154 MW	2021	Tatanka Ridge LLC
21	Dakota Range III Wind Project	Wind	154 MW	2021	Engie North America
22	Spirit Mound	Oil and petroleum	135 MW	1978	Basin Electric Power Coop
23	Wild Springs	Solar	128 MW	2024	Geronimo Power
24	Aberdeen CT	Natural gas	111 MW	1978	NorthWestern Energy (SD)
25	Ben French	Natural gas	110 MW	1965	Black Hills Power, Inc.

All 54 plants in the finder

Largest plant for each main fuel

Main fuel	Plants	Capacity	Largest plant	Its capacity
Wind	25	3,457 MW	Dakota Range Wind	304 MW
Hydroelectric	4	1,648 MW	Oahe	786 MW
Natural gas	11	1,646 MW	Angus Anson	406 MW
Coal	1	451 MW	Big Stone	451 MW
Oil and petroleum	8	244 MW	Spirit Mound	135 MW
Solar	4	217 MW	Wild Springs	128 MW
Biomass and waste	1	5.4 MW	POET Biorefining - Chancellor	5.4 MW

Balancing areas

Area	Plants	Capacity
Southwest Power Pool	30	4,305 MW
MISO (Midcontinent)	17	2,865 MW
WAPA Rocky Mountain	7	500 MW

Biggest operators here

Operator	Plants	Capacity
USACE-Omaha	3	1,644 MW
Northern States Power Co - Minnesota	3	910 MW
Basin Electric Power Coop	4	837 MW
Otter Tail Power Co	3	824 MW
Engie North America	2	404 MW
Geronimo Power	2	328 MW
Southern Power Co	1	300 MW
NorthWestern Energy (SD)	6	279 MW
Avangrid Power LLC	2	260 MW
AES Distributed Energy	1	220 MW