FIRSTENERGY ALLEGHENY ENERGY UNITS 8 & 9

How FIRSTENERGY ALLEGHENY ENERGY UNITS 8 & 9 compares

With 88 MW of capacity, FIRSTENERGY ALLEGHENY ENERGY UNITS 8 & 9 ranks 51st among the 170 operating power plants Bywatts maps in Pennsylvania and 16th of the 28 operating Natural Gas plants in the state. It accounts for about 0.8% of Pennsylvania's operating Natural Gas capacity and 0.2% of all operating capacity in the state. Nationally it is the 706th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2000, it is newer than 49% 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 Fayette County with 3 other operating plants, including FAYETTE ENERGY FACILITY and FIRSTENERGY LAKE LYNN POWER STATION.

EIA-860 lists 2 generators at the site with 88 MW of nameplate capacity, all natural gas fired combustion turbine technology. Net generation was 147 GWh in 2024 (a 19% capacity factor), up 10% from 2022.

Grid neighborhood

The nearest named substation is FORT MARTIN (500 kV), about 5.4 miles away; the closest transmission line found within 10 miles is a 138 kV line owned by WEST PENN POWER COMPANY, under 0.1 miles away. Another 7 operating power plants totaling 2,870 MW sit within 25 miles; the largest is FIRSTENERGY FORT MARTIN POWER STATION (1,152 MW, Coal). Within 50 miles are 2 mapped data centers; the nearest is Citynet Pittsburgh in Pittsburgh, about 49.1 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