Armstrong
Natural gas power plant in Armstrong County, Pennsylvania. 688 MW of nameplate capacity across 4 generators, operated by Armstrong Power LLC.
Also known as Armstrong Power Plant · EIA plant 55347
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Key facts
- Capacity
- 688 MWNameplate
- Generators
- 4 operatingEIA-860M, August 2026
- Operating since
- May 2002First generator online
- Operator
- Armstrong Power LLCEIA operator ID 56412
- Grid
- PJMBalancing authority PJM
- Price nodes
- 4 PJM nodesResource nodes with prices
- Location
- Armstrong County, PA40.6380, −79.3517
- EIA plant ID
- 55347EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Armstrong produces
Free · EIA-923Net generation, 2025
1.29 TWh
1,286,226 MWh, final
Capacity factor, 2025
21.3%
2024: 17.4%
January to July 2026
584 GWh
Provisional
Range, 2015 to 2025
0.5–1.4
TWh a year. Low 2018, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | 208,617 | Not reported | 7 of 12 |
| 2003 | 271,981 | Not reported | 12 of 12 |
| 2004 | 219,640 | Not reported | 12 of 12 |
| 2005 | 190,869 | Not reported | 12 of 12 |
| 2006 | 62,469 | Not reported | 12 of 12 |
| 2007 | 69,527 | Not reported | 12 of 12 |
| 2008 | 16,940 | Not reported | 12 of 12 |
| 2009 | 34,080 | Not reported | 12 of 12 |
| 2010 | 87,695 | 1.5% | 12 of 12 |
| 2011 | 150,152 | 2.5% | 12 of 12 |
| 2012 | 187,215 | 3.1% | 12 of 12 |
| 2013 | 261,706 | 4.3% | 12 of 12 |
| 2014 | 711,764 | 11.8% | 12 of 12 |
| 2015 | 1,206,459 | 20.0% | 12 of 12 |
| 2016 | 1,171,910 | 19.4% | 12 of 12 |
| 2017 | 1,372,482 | 22.8% | 12 of 12 |
| 2018 | 480,570 | 8.0% | 12 of 12 |
| 2019 | 826,177 | 13.7% | 12 of 12 |
| 2020 | 1,150,560 | 19.0% | 12 of 12 |
| 2021 | 1,089,577 | 18.1% | 12 of 12 |
| 2022 | 1,316,902 | 21.9% | 12 of 12 |
| 2023 | 1,114,133 | 18.5% | 12 of 12 |
| 2024 | 1,053,255 | 17.4% | 12 of 12 |
| 2025 | 1,286,226 | 21.3% | 12 of 12 |
| 2026 (provisional, partial year) | 583,859 | 16.7% | 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 · PJMEmissions
Free · EPA CAMPDCO₂, 2025
797,523
US short tons. 2024: 653,912
SO₂, 2025
4
US short tons
NOx, 2025
217
US short tons
CO₂ per MWh, calculated
0.62 t
About 1,240 lb per MWh
4 of 4 EPA units reported CO₂ in 2025 (1, 2, 3, 4), matched to EIA plant 55347 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, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbine | 172.0 | May 2002 |
| 2 | Natural Gas Fired Combustion Turbine | 172.0 | May 2002 |
| 3 | Natural Gas Fired Combustion Turbine | 172.0 | May 2002 |
| 4 | Natural Gas Fired Combustion Turbine | 172.0 | May 2002 |
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 Armstrong Power LLC 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 Armstrong
Questions about Armstrong
How much power does Armstrong produce?
Armstrong reported 1,286,226 MWh (1.29 TWh) of net generation in 2025, a 21.3% capacity factor on 688 MW of nameplate capacity. From January to July 2026 it reported 584 GWh, which is provisional.
Where is Armstrong?
Armstrong is in Armstrong County, Pennsylvania, at 40.6380, −79.3517. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Armstrong?
EIA-860M for August 2026 lists Armstrong Power LLC as the operator (EIA operator ID 56412). The operator is not always the owner.
When did Armstrong start operating?
Its first generator began operating in May 2002, according to EIA-860M.
Does InfraMap have power prices for Armstrong?
Yes. InfraMap has PJM day-ahead and real-time prices at 4 price nodes linked to Armstrong, 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
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page