Home / Power plants / Indiana / Harding Street

Harding Street

Natural gas power plant · Marion County, Indiana

Nameplate capacity

1,065 MW

Rank in Indiana

of 224 plants

In service since

1958

June 1958

Details

Primary fuel: Natural gas
Technology: Natural Gas Steam Turbine
Operator: AES Indiana
County: Marion County
Generating units: 10
Share of state capacity: 3.10%
Rank among natural gas plants in Indiana: #2 of 43
EIA plant code: 990

Generating units

Individual generating units at Harding Street
Unit	Technology	Nameplate	Summer	Online	Status
7	Natural Gas Steam Turbine	463 MW	418 MW	1973	Operating
GT6	Natural Gas Fired Combustion Turbine	161 MW	154 MW	2002	Operating
5	Natural Gas Steam Turbine	100 MW	101 MW	1958	Operating
6	Natural Gas Steam Turbine	100 MW	99 MW	1961	Operating
GT4	Natural Gas Fired Combustion Turbine	83 MW	67 MW	1994	Operating
GT5	Natural Gas Fired Combustion Turbine	83 MW	67 MW	1995	Operating
GT1	Petroleum Liquids	26 MW	19 MW	1973	Operating
GT2	Petroleum Liquids	26 MW	18 MW	1973	Operating
BAT1	Batteries	20 MW	20 MW	2016	Operating
IC1	Petroleum Liquids	2.7 MW	3.0 MW	1967	Operating

Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.

Similarly sized plants in Indiana

R M Schahfer	Coal	1,105 MW
Merom	Coal	1,080 MW
Warrick	Coal	823 MW
Edwardsport	Natural gas	813 MW

About this data

From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 1,065 MW solar plant and a 1,065 MW nuclear plant have the same entry here and produce very different amounts of electricity.

“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Indiana power plants · What Indiana actually generates