How many natural gas power plants are planned in South Dakota?

Developers have proposed 14 natural gas power plants in South Dakota with 1.6 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.

What is the largest planned natural gas power plant in South Dakota?

Astoria 345kV substation in Deuel County, South Dakota is the largest planned, at 1,144 MW. It is expected to come online in 2030.

Who is developing natural gas power plants in South Dakota?

Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

Planned natural gas power plants in South Dakota

Developers have proposed 14 natural gas power plants in South Dakota with 1.6 GW of capacity, in the grid operators' interconnection queues.

Planned14

See operating natural gas power plants in South Dakota

Updated monthly. Last updated November 2026.

Under 250 MW250–999 MW1 GW and up

Updated monthly. Last updated November 2026.

More planned natural gas power plants in South Dakota are expected online in 2026 than in any other year

2026’262027’272028’282029’292030’302031’312032’322033’33

Planned natural gas power plants by the year they're expected online. Source: the grid operators' interconnection queues, compiled by Cleanview.

The 10 largest planned natural gas power plants in South Dakota

Planned, by capacity

#	Natural gas power plant	County	Expected online	Capacity
1	Astoria 345kV substation	Deuel County	2030	1,144 MW
2	Aberdeen Thermal	Aberdeen County	2030	138 MW
3	Toronto Power Plant	Deuel County	2029	36 MW
4	Toronto Power Plant	Deuel County	2029	36 MW
5	Toronto Power Plant	Deuel County	2029	36 MW
6	Toronto Power Plant	Deuel County	2029	36 MW
7	Lange Generating Station	Pennington County	2026	17 MW
8	Lange Generating Station	Pennington County	2026	17 MW
9	Lange Generating Station	Pennington County	2026	17 MW
10	Lange Generating Station	Pennington County	2026	17 MW

Planned natural gas power plants expected online soonest in South Dakota

In the next 18 months, soonest first

#	Natural gas power plant	County	Expected online	Capacity
1	Lange Generating Station	Pennington County	2026	17 MW
2	Lange Generating Station	Pennington County	2026	17 MW
3	Lange Generating Station	Pennington County	2026	17 MW
4	Lange Generating Station	Pennington County	2026	17 MW
5	Lange Generating Station	Pennington County	2026	17 MW
6	Lange Generating Station	Pennington County	2026	17 MW

The developer behind each project is on paid plans. See plans

How Cleanview tracks natural gas power plants

Operating natural gas power plants come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about natural gas power plants in South Dakota

How many natural gas power plants are planned in South Dakota?: Developers have proposed 14 natural gas power plants in South Dakota with 1.6 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.
What is the largest planned natural gas power plant in South Dakota?: Astoria 345kV substation in Deuel County, South Dakota is the largest planned, at 1,144 MW. It is expected to come online in 2030.
Who is developing natural gas power plants in South Dakota?: Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.