ALLEGHENY ENERGY UNITS 3 4 & 5

How ALLEGHENY ENERGY UNITS 3 4 & 5 compares

With 556 MW of capacity, ALLEGHENY ENERGY UNITS 3 4 & 5 ranks 26th among the 170 operating power plants Bywatts maps in Pennsylvania and 11th of the 28 operating Natural Gas plants in the state. It accounts for about 5.2% of Pennsylvania's operating Natural Gas capacity and 1.4% of all operating capacity in the state. Nationally it is the 292nd-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2003, it is newer than 56% of the 168 operating Pennsylvania plants with a recorded commissioning year. Its operator, ALLEGHENY ENERGY SUPPLY CO LLC, runs 8 operating plants in Pennsylvania totaling 932 MW. It shares Allegheny County with 5 other operating plants, including BRUNOT ISLAND and FIRSTENERGY ALLEGHENY ENERGY UNITS 1 & 2.

EIA-860 lists 3 generators at the site with 556 MW of nameplate capacity, all natural gas fired combined cycle technology. Net generation was 4,050 GWh in 2024 (an 83% capacity factor), down 8% from 2022.

Grid neighborhood

The nearest named substation is CABOT (500 kV), about 17.8 miles away; the closest transmission line found within 10 miles is a 138 kV line owned by DUQUESNE LIGHT CO, under 0.1 miles away. Another 10 operating power plants totaling 3,194 MW sit within 25 miles; the largest is KEYSTONE (1,884 MW, Coal). Within 50 miles are 2 mapped data centers; the nearest is Crown Castle Pittsburgh (Allegheny Center Mall) in Pittsburgh, about 14.1 miles away.

Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860/923 survey data and PeeringDB data center locations; distances are straight-line. Sources and methodology