Search plants, projects, owners, and states
1064.7 MW Batteries (20 MW) + Natural Gas Fired Combustion Turbine (327 MW) + Natural Gas Steam Turbine (663 MW) + Petroleum Liquids (55 MW) operating in Marion, IN — Midcontinent Independent Transmission System Operator, Inc..
1,064.7 MW
Nameplate Capacity
10
Generators
units
Hybrid (4)
Technology
Batteries + Natural Gas Fired Combustion Turbine + Natural Gas Steam Turbine + Petroleum Liquids
1958
Operating Since
Coordinates
39.7113, -86.1969
County
Marion, IN
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | AES Indiana | AES Indiana | — |
| Owner(s) | AES Indiana | AES | — |
| Status | Operating | — | — |
The Harding Street Station is a 12-unit, 1,196 MW nameplate capacity, gas, coal, and oil-fired generating station located at 3700 S. Harding St., in Indianapolis, Indiana, U.S. It is owned by AES Indiana, a subsidiary of AES. Completed in 1973, Harding Street Station's tallest chimneys are 565 feet (172 m) in height.
Read more on WikipediaHarding Street is a 1064.7 MW hybrid power plant located in Marion County, Indiana. The plant, which began operating in 1958, is owned by AES and operated by AES Indiana. It utilizes a mix of technologies, including natural gas fired combustion turbines, natural gas steam turbines, petroleum liquids, and batteries. The plant has 10 generators and also includes a 20 MWh battery energy storage system (BESS) with a one-hour duration and lithium-ion battery (LIB) chemistry. Harding Street operates within the Midcontinent Independent Transmission System Operator, Inc. balancing authority and the ReliabilityFirst Corporation (RFC) NERC region.
The plant's primary fuel source is natural gas. In the most recent year with available data, Harding Street generated 3,425,680 MWh of electricity, achieving a capacity factor of 36.7%. Harding Street is the second-largest power plant in Indiana out of 20, and ranks 155th nationally out of 945 plants.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
RFC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
138.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
339.6K MWh
Latest Month
3.4M MWh
Annual Generation
36.7%
Capacity Factor
CO₂ Intensity
1287 lb/MWh
NOx
0.671 lb/MWh
SO₂
0.007 lb/MWh
CH₄
0.026 lb/MWh
N₂O
0.003 lb/MWh
Capacity Factor
31.1%
Annual Net Gen
2900 GWh
CO₂eq
1288 lb/MWh
Subregion
RFC West
2013
$965/kW
Est. Construction Cost
Total estimated cost: $1.0B
Market Position
ISO/RTO Market
MISO
LMP Node
IPL.16STOU7O7
Pricing Hub
INDIANA.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-03-14
View all 6 articlesNo ask pi reports yet for this entity.
ask pi about Harding Street