← Back to map

Harding Street

Marion County, Indiana · EIA plant ID 990 · Operator: Indianapolis Power & Light Co
Natural gasBatteriesNatural Gas Fired Combustion TurbineNatural Gas Steam TurbinePetroleum Liquids⛽ Dual-fuelMISOBA: MISO
📍 Open in Google Maps
Nameplate1,065MWSummer 966 MW
Generators10in service
Net generation4,151GWh12 mo to Aug 2026
Capacity factor50%gas/coal/oil units, summer MW
Heat rate11,990Btu/kWhfossil units, electric fuel, HHV
First online1958Runs as baseload

The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.

Monthly net generation

EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
0100200300400GWh2001200320052007200920112013201520172019202120232025

Capacity factor by year

Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
0%20%40%2005201020152020202550.1% · 12 mo

Heat rate by year

Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
9,00010,00011,00012,0002005201020152020202511,990 Btu/kWh · 12 mo
Annual data table
YearNet GWhCapacity factorHeat rate (Btu/kWh)
20013,970——
20023,784.1——
20033,896.240.4%10,040
20044,019.341.5%10,271
20053,53836.6%10,540
20063,862.940.0%10,346
20073,848.939.9%10,506
20083,406.535.2%10,529
20093,833.439.7%10,543
20103,333.334.5%10,617
20113,730.938.6%10,417
20123,784.739.1%10,450
20134,189.149.7%10,423
20143,847.946.4%10,415
20153,290.439.3%10,507
20161,999.524.1%11,212
20171,202.714.5%11,375
20181,253.315.1%11,710
20191,02812.4%12,611
20201,61419.4%12,387
20211,53818.6%12,467
20221,379.716.7%12,639
20232,899.835.0%11,928
20243,654.444.0%12,156
20253,425.741.3%11,953

Fuel capability

Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo54,584 MMBtu
Last month with liquid burnAug 2026
Switch while operatingYes
Net summer MW on gas134
Net summer MW on oil134
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)

Generators

EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
Gen IDTechnologyPrime moverNameplate MWSummer MWOnlineStatusPlanned retirementOEM / model
5Natural Gas Steam TurbineST100101Jun 1958Operating—coming soon
6Natural Gas Steam TurbineST10099May 1961Operating—coming soon
7Natural Gas Steam TurbineST463418Jul 1973Operating—coming soon
BAT1BatteriesBA2020Jun 2016Operating—coming soon
GT1Petroleum LiquidsGT2619.1May 1973Operating—coming soon
GT2Petroleum LiquidsGT2617.9May 1973Operating—coming soon
GT4Natural Gas Fired Combustion TurbineGT8367Apr 1994Operating—coming soon
GT5Natural Gas Fired Combustion TurbineGT8367Jan 1995Operating—coming soon
GT6Natural Gas Fired Combustion TurbineGT161154May 2002Operating—coming soon
IC1Petroleum LiquidsIC2.73Apr 1967Operating—coming soon
3Petroleum LiquidsST43.835Sep 1941Retired Jun 2013—coming soon
4Petroleum LiquidsST43.835Jun 1947Retired Jun 2013—coming soon
GT3Petroleum LiquidsGT2610May 1973Retired Jun 2013—coming soon

Owner / operator

Operator: Indianapolis Power & Light Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Indianapolis Power & Light Co100.0%1,065 MW

Nearby plants

Within 80 km.
Belmont4 MW1 km
Covanta Indianapolis Energy7 MW2.7 km
Maywood Photovoltaic Project8 MW4 km
Lilly Technical Center5 MW4.2 km
Indy Grocers1 MW4.6 km
CC Perry K5 MW6.3 km