Allegheny Energy Units 3 4 & 5 is a natural gas-fired power facility with 556 MW of EIA-reported nameplate capacity in Allegheny County, Pennsylvania, registered as EIA Plant ID 55710. Its grid role is high-utilization combined-cycle generation; the permit states that Units 3, 4, and 5 operate more than 80% of the year.
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Primary generation technology.
Allegheny County · PJM
Allegheny Energy Units 3 4 & 5 is operating.
Natural Gas Fired Combined Cycle
Allegheny Energy Units 3 4 & 5 is operating.
PJM
PJM · Allegheny County
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| UNT3 | 184 MW 181.4 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 2003 | Operating |
| UNT4 | 184 MW 182.5 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 2003 | Operating |
| UNT5 | 188 MW 198.7 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CA | Jul 2003 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
EIA-860 lists generator UNT3, generator UNT4, generator UNT5 with this operating date.
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Allegheny Energy Units 3 4 & 5Current | 556 MW | PA | |
| Springdale 1 & 2 | 87.6 MW | PA |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioAllegheny County issued Springdale Energy, LLC Title V Operating Permit No. 0580-OP26, with an expiration date of May 13, 2031.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Allegheny Energy Units 3 4 & 5 has a reported capacity of 556 MW. Source: EIA Form 860.
Allegheny Energy Units 3 4 & 5 is a Natural Gas Fired Combined Cycle facility in Allegheny County, PA, participating in the PJM market.
Allegheny Energy Units 3 4 & 5 is in Allegheny County, PA, inside the PJM balancing area.
Allegheny Energy Units 3 4 & 5 is operated by Springdale Energy LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Allegheny Energy Units 3 4 & 5 reported 3,790.1 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.
By capacity, Allegheny Energy Units 3 4 & 5 ranks #283 of 538 operating plants of the same technology nationally. It ranks #20 of 26 in PA.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
