Harding Street
Natural gas project in Marion County, Indiana. 1,064.7 MW of nameplate capacity across 10 generators, operated by AES Indiana.
Also known as Harding Street Station · EIA plant 990
This project groups Harding Street (EIA 990). EIA reports them as separate plants.
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1,064.7 MWNatural gas 990.0 · Oil 54.7 · Battery storage 20.0
- Generators
- 10 operatingEIA-860M, August 2026
- Operating since
- June 1958First generator online
- Operator
- AES IndianaEIA operator ID 9273
- Grid
- MISOBalancing authority MISO
- Price nodes
- 4 MISO nodesResource nodes with prices
- Location
- Marion County, IN39.7113, −86.1969
- EIA plant ID
- 990EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Harding Street produces
Free · EIA-923Net generation, 2025
3.43 TWh
3,425,680 MWh, final
Capacity factor, 2025
37.4%
2024: 39.8%
January to July 2026
2.55 TWh
Provisional
Range, 2017 to 2025
1.0–3.7
TWh a year. Low 2019, high 2024
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 3,538,495 | Not reported | 12 of 12 |
| 2001 | 3,970,009 | Not reported | 12 of 12 |
| 2002 | 3,784,144 | Not reported | 12 of 12 |
| 2003 | 3,011,114 | Not reported | 9 of 12 |
| 2004 | 4,019,285 | Not reported | 12 of 12 |
| 2005 | 3,537,960 | Not reported | 12 of 12 |
| 2006 | 3,862,890 | Not reported | 12 of 12 |
| 2007 | 3,848,917 | Not reported | 12 of 12 |
| 2008 | 3,406,460 | Not reported | 12 of 12 |
| 2009 | 3,833,427 | Not reported | 12 of 12 |
| 2010 | 3,333,287 | Not reported | 12 of 12 |
| 2011 | 3,730,943 | 35.6% | 12 of 12 |
| 2012 | 3,784,659 | 36.0% | 12 of 12 |
| 2013 | 4,189,063 | Not reported | 12 of 12 |
| 2014 | 3,847,897 | 42.0% | 12 of 12 |
| 2015 | 255,586 | 32.9% | 1 of 12 |
| 2016 | 1,263,439 | Not reported | 7 of 12 |
| 2017 | 1,202,727 | 13.1% | 12 of 12 |
| 2018 | 1,253,317 | 13.7% | 12 of 12 |
| 2019 | 1,027,980 | 11.2% | 12 of 12 |
| 2020 | 1,614,005 | 17.6% | 12 of 12 |
| 2021 | 1,537,977 | 16.8% | 12 of 12 |
| 2022 | 1,379,690 | 15.1% | 12 of 12 |
| 2023 | 2,899,759 | 31.7% | 12 of 12 |
| 2024 | 3,654,402 | 39.8% | 12 of 12 |
| 2025 | 3,425,680 | 37.4% | 12 of 12 |
| 2026 (provisional, partial year) | 2,550,160 | 48.0% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · MISOEmissions
Free · EPA CAMPDCO₂, 2025
2.25M
US short tons. 2024: 2.37M
SO₂, 2025
11
US short tons
NOx, 2025
1,073
US short tons
CO₂ per MWh, calculated
0.66 t
About 1,312 lb per MWh
6 of 6 EPA units reported CO₂ in 2025 (10, 50, 60, 70, 9, GT4, GT5, GT6), matched to EIA plant 990 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
46,609
million gallons
Consumption, 2024
3,757
million gallons
Source
West fork of White River
Surface, Fresh. Once-through
Watershed stress
Very low/none · 0.131
USGS SUI, HUC12 Lick Creek
36 of 36 cooling months report withdrawal. SUI of the source river HUC12 within 3 km. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 5 | Natural Gas Steam Turbine | 100.0 | June 1958 |
| 6 | Natural Gas Steam Turbine | 100.0 | May 1961 |
| 7 | Natural Gas Steam Turbine | 463.0 | July 1973 |
| BAT1 | Batteries | 20.0 | June 2016 |
| GT1 | Petroleum Liquids | 26.0 | May 1973 |
| GT2 | Petroleum Liquids | 26.0 | May 1973 |
| GT4 | Natural Gas Fired Combustion Turbine | 83.0 | April 1994 |
| GT5 | Natural Gas Fired Combustion Turbine | 83.0 | January 1995 |
| GT6 | Natural Gas Fired Combustion Turbine | 161.0 | May 2002 |
| IC1 | Petroleum Liquids | 2.7 | April 1967 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists AES Indiana as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Harding Street
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Questions about Harding Street
How much power does Harding Street produce?
Harding Street reported 3,425,680 MWh (3.43 TWh) of net generation in 2025, a 37.4% capacity factor on 1,064.7 MW of nameplate capacity. From January to July 2026 it reported 2.55 TWh, which is provisional.
Where is Harding Street?
Harding Street is in Marion County, Indiana, at 39.7113, −86.1969. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Harding Street?
EIA-860M for August 2026 lists AES Indiana as the operator (EIA operator ID 9273). The operator is not always the owner.
When did Harding Street start operating?
Its first generator began operating in June 1958, according to EIA-860M.
Does InfraMap have power prices for Harding Street?
Yes. InfraMap has MISO day-ahead and real-time prices at 4 price nodes linked to Harding Street, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- MISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page