Power plant · EIA plant code 990
Harding Street
- Operator
- AES Indiana
- Location
- Marion, IN (county level only)
- Balancing authority
- Midcontinent Independent Transmission System Operator, Inc.. (MISO)
- Nameplate capacity
- 1,064.7 MW
- Summer capacity
- 966 MW
U.S. Energy Information Administration · Annual Electric Generator Report (Form EIA-860) · data for 2025 · as of Sep 10, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Sep 10, 2027. Last checked for an update: Oct 31, 2026.
Generation in 2025
- Net generation
- 3,425,680 MWh
- Capacity factor
- 36.7%
Capacity factor is net generation divided by nameplate capacity times the hours each generator was in service that year, counted by month.
U.S. Energy Information Administration · Power Plant Operations Report (Form EIA-923) · data for 2025 · as of Sep 11, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Sep 11, 2027. Last checked for an update: Oct 31, 2026.
Emissions
- Carbon dioxide in 2023
- 1,692,347 metric tons
- Carbon dioxide per MWh
- 1,287 lb/MWh
eGRID reports 1,865,494 short tons. One short ton is 0.90718474 metric tons.
Emissions are for 2023, the newest eGRID year. Generation is for 2025, the newest EIA-923 year.
U.S. Environmental Protection Agency · Emissions & Generation Resource Integrated Database (eGRID) · data for 2023 · as of Jun 16, 2025 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Jan 31, 2026. Last checked for an update: Oct 31, 2026.
Generators
| Generator | Technology | Energy source | Nameplate | Operating since | Status |
|---|---|---|---|---|---|
| 5 | Natural Gas Steam Turbine | NG | 100 MW | 1958 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 6 | Natural Gas Steam Turbine | NG | 100 MW | 1961 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 7 | Natural Gas Steam Turbine | NG | 463 MW | 1973 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| BAT1 | Batteries | MWH | 20 MW | 2016 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| GT1 | Petroleum Liquids | DFO | 26 MW | 1973 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| GT2 | Petroleum Liquids | DFO | 26 MW | 1973 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| GT4 | Natural Gas Fired Combustion Turbine | NG | 83 MW | 1994 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| GT5 | Natural Gas Fired Combustion Turbine | NG | 83 MW | 1995 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| GT6 | Natural Gas Fired Combustion Turbine | NG | 161 MW | 2002 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| IC1 | Petroleum Liquids | DFO | 2.7 MW | 1967 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
U.S. Energy Information Administration · Monthly Update to the Annual Electric Generator Report (Form EIA-860M) · data for 2026-09 · as of Oct 23, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Nov 23, 2026. Last checked for an update: Oct 31, 2026.