How many natural gas power plants are planned in Iowa?

Developers have proposed 13 natural gas power plants in Iowa with 2.4 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 Iowa?

Killdeer in Cerro Gordo County, Iowa is the largest planned, at 787 MW. It is expected to come online in 2028.

Who is developing natural gas power plants in Iowa?

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 Iowa

Developers have proposed 13 natural gas power plants in Iowa with 2.4 GW of capacity, in the grid operators' interconnection queues.

Planned13

See operating natural gas power plants in Iowa

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 Iowa are expected online in 2027 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 Iowa

Planned, by capacity

#	Natural gas power plant	County	Expected online	Capacity
1	Killdeer	Cerro Gordo County	2028	787 MW
2	SUB T HASKINS	Washington County	2030	525 MW
3	SUB T 3 - HILLS 3 345.0kV	Washington County	2027	350 MW
4	ORIENT - NORTHBORO 345.0kV	Adair County	2027	263 MW
5	Salem - Hickory Creek 345 kV line	Dubuque County	2027	160 MW
6	Emery	Cerro Gordo County	2028	98 MW
7	Oakridge 69 kV Substation	Linn County	2025	95 MW
8	Marshalltown	Marshall County	2024	75 MW
9	Muscatine Plant #1	Muscatine County	2027	35 MW
10	Hardin Thermal	Hardin County	2024	17 MW

Planned natural gas power plants expected online soonest in Iowa

In the next 18 months, soonest first

#	Natural gas power plant	County	Expected online	Capacity
1	SUB T 3 - HILLS 3 345.0kV	Washington County	2027	350 MW
2	Salem - Hickory Creek 345 kV line	Dubuque County	2027	160 MW
3	ORIENT - NORTHBORO 345.0kV	Adair County	2027	263 MW
4	Muscatine Plant #1	Muscatine County	2027	35 MW
5	Sioux Center Thermal	Sioux Center County	2028	6 MW
6	Sioux Center Thermal	Sioux Center County	2028	6 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 Iowa

How many natural gas power plants are planned in Iowa?: Developers have proposed 13 natural gas power plants in Iowa with 2.4 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 Iowa?: Killdeer in Cerro Gordo County, Iowa is the largest planned, at 787 MW. It is expected to come online in 2028.
Who is developing natural gas power plants in Iowa?: 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.