Armstrong
Armstrong County, Pennsylvania · EIA plant ID 55347 · Operator: IPA Operations Inc - Armstrong
Nameplate688MWSummer 671 MW
Generators4in service
Net generation1,243GWh12 mo to Aug 2026
Capacity factor21%gas/coal/oil units, summer MW
Heat rate10,746Btu/kWhfossil units, electric fuel, HHV
First online2002Runs as peaking
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
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.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2002 | 208.6 | 6.1% | 10,444 |
| 2003 | 272 | 5.3% | 10,677 |
| 2004 | 219.6 | 4.3% | 10,710 |
| 2005 | 190.9 | 3.7% | 10,764 |
| 2006 | 62.5 | 1.2% | 11,353 |
| 2007 | 69.5 | 1.4% | 10,723 |
| 2008 | 16.9 | 0.3% | 10,602 |
| 2009 | 34.1 | 0.7% | 11,346 |
| 2010 | 87.7 | 1.7% | 10,765 |
| 2011 | 150.2 | 2.9% | 10,788 |
| 2012 | 187.2 | 3.6% | 10,676 |
| 2013 | 261.7 | 5.0% | 10,503 |
| 2014 | 711.8 | 13.5% | 10,347 |
| 2015 | 1,206.5 | 22.8% | 10,410 |
| 2016 | 1,171.9 | 22.1% | 10,417 |
| 2017 | 1,372.5 | 26.0% | 10,765 |
| 2018 | 480.6 | 8.2% | 10,819 |
| 2019 | 826.2 | 14.1% | 10,531 |
| 2020 | 1,150.6 | 19.5% | 10,561 |
| 2021 | 1,089.6 | 18.5% | 10,614 |
| 2022 | 1,316.9 | 22.4% | 10,545 |
| 2023 | 1,114.1 | 19.0% | 10,641 |
| 2024 | 1,053.3 | 17.9% | 10,705 |
| 2025 | 1,286.2 | 21.9% | 10,660 |
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 mo300,906 MMBtu
Last month with liquid burnAug 2026
Switch while operatingYes
Net summer MW on gas669
Net summer MW on oil669
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 ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbine | GT | 172 | 168.4 | May 2002 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 172 | 163.6 | May 2002 | Operating | — | coming soon |
| 3 | Natural Gas Fired Combustion Turbine | GT | 172 | 169 | May 2002 | Operating | — | coming soon |
| 4 | Natural Gas Fired Combustion Turbine | GT | 172 | 169.7 | May 2002 | Operating | — | coming soon |
Owner / operator
Operator: IPA Operations Inc - Armstrong. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| IPA Operations Inc - Armstrong | 100.0% | 688 MW |
Nearby plants
Within 80 km.
| Keystone | 1,883 MW | 2.6 km |
| Burrell - PA 0396 (Copeland) | — | 7.7 km |
| Indiana University of Pennsylvania | 24 MW | 16.4 km |
| Homer City Generating Station | — | 19.1 km |
| Conemaugh Hydro Plant | 15 MW | 19.3 km |
| Kittanning - PA 0407 (Hoeter C) | — | 20.5 km |