Armstrong — Plant Summary
- EIA Plant ID
- 55347
- Capacity
- 688 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combustion Turbine
- Status
- Operating
- Location
- Armstrong, PA
- Operating Since
- 2002
- Generators
- 4
- Operator
- Armstrong Power LLC
- Parent Company
- LS Power Development
- Annual Generation
- 1,286,226 MWh
- Capacity Factor
- 21.4%
- Balancing Authority
- PJM Interconnection, LLC
- ISO/RTO
- PJM
- NERC Region
- RFC
Armstrong
OperatingNatural Gas
Ranked #22 of 70 Natural Gas plants in PA#325 of 2009 nationally
688 MW Natural Gas operating in Armstrong, PA — PJM Interconnection, LLC
EIAWD
688 MW
Nameplate Capacity
4
Generators
units
Natural Gas Fired Combustion Turbine
Technology
2002
Operating Since
Location
Coordinates
40.6380, -79.3517
County
Armstrong, PA
Nearby Plants
- KeystoneDistillate Oil1883.2 MW · 2.6 km
- Indiana University of PennsylvaniaNatural Gas24.4 MW · 16.4 km
- Homer City Generating StationNatural Gas4396 MW · 19.1 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Armstrong Power LLC | Armstrong Power | — |
| Owner(s) | Armstrong Power LLC | LS Power Development | — |
| Status | Operating | — | — |
Ownership Chain
About
The Armstrong power plant is a 688 MW natural gas-fired facility located in Armstrong County, Pennsylvania. It began operating in 2002 and consists of four natural gas fired combustion turbine generators. The plant is owned by LS Power Development and operated by Armstrong Power LLC. It is interconnected to the PJM Interconnection, LLC balancing authority within the RFC NERC region.
In the most recent year of reported data, Armstrong generated 1,286,226 MWh of electricity, achieving a capacity factor of 21.4%. The plant ranks 20th out of 35 power plants in Pennsylvania and 328th out of 945 plants nationally.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
RFC
Balancing Authority
PJM Interconnection, LLC
Grid Voltage
526 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
99.5K MWh
Latest Month
1.3M MWh
Annual Generation
21.4%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
South Bend Generation Station · 500 kV
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
PJM
LMP Node
SBEND 18kv-ct1
Pricing Hub
WESTERN HUB
Node Source
EIA-860 direct report
News & Articles (10)Beta
Regulatory·state puc
Pennsylvania must act to limit greenhouse gases, lawyers argue
Citing the state's environmental rights amendment, they contend the government has an obligation to fight climate change.
Pennsylvania Capital-Star·4 weeks ago
Regulatory·permitting
DEP Invites Comments On Proposed Consent Decree Covering Wastewater Discharges To Continue Operation Of The Keystone And Conemaugh Coal-Fired Power Plants In Indiana And Armstrong Counties
The Department of Environmental Protection published notice in the January 10 PA Bulletin inviting comments on a proposed Consent Decree...
Department of Environmental Protection (regulator)
PA Environment Digest Blog·2 months ago
Regulatory·ferc order
Pa. electric customers will pay to keep an old power plant running under federal orders
Constellation Energy had planned to retire the Eddystone Generating Station in Delaware County at the end of May.
Constellation Energy (operator)
Pennsylvania Capital-Star·6 months ago
Regulatory·permitting
Army Corps of Engineers holds public meeting on nuclear waste dump cleanup in Western Pa.
The Army Corps of Engineers held a public information session to update residents on remediation efforts in Parks Township, Armstrong...
Army Corps of Engineers (regulator)
WTAE·9 months ago
Last updated 2026-03-14
View all 10 articles