World Power Plants

Allegheny Hydro No 917.8 MW Hydroelectric

HydroRenewableVerified: Jul 2026

Allegheny Hydro No 9 is a 17.8 MW hydro power plant in the United States, operated by Allegheny Hydro LP since 1991. Ranked #519 of 1,469 hydro plants in the United States, this facility accounts for 0.02% of the country's total hydro capacity of 117,947 MW. The largest hydro plant in the United States is Grand Coulee Dam at 6,809 MW, making Allegheny Hydro No 9 382 times smaller. Nearby plants include Homer City Generating Station (2,012 MW, Coal), Keystone (1,883.2 MW, Coal), and Keystone Generating Station (1,883.2 MW, Coal). The plant is located in Pennsylvania, approximately 60 km from Pittsburgh.

Capacity
17.8 MW
Commissioning Year
1991

35 years old

Owner
Allegheny Hydro LP
Location
40.9560°, -79.5507°

United States of America, North America

Context & rankings
  • 4,177. largest of 10,098 plants in United States of America
  • #20,545 worldwide by installed capacity
  • #4,697 of 8,493 Hydroelectric plants worldwide
Age & fleet comparison

35 years in operation

Hydroelectric fleet average: 42.1 years

Operator portfolio

Allegheny Hydro LP operates 2 plants totalling 31 MW

Regional density

40 plants within 100 km, 20,924 MW combined

Nearest plant: Allegheny Hydro No 8 (8.9 km)

Location

Coordinates:: 40.956000, -79.550700
Open in Google Maps
Carbon Footprint

Zero Direct Emissions

Allegheny Hydro No 9 is a hydro power plant producing approximately 62 GWh of clean electricity per year with zero direct CO₂ emissions during operation.

Lifecycle emissions: ~24 g CO₂/kWh (manufacturing, transport, decommissioning)

Technical Details

Primary Fuel Type
Hydro
Energy Source
Renewable
Country
United States of America
Continent
North America
Data Source
Global Power Plant Database

United States of AmericaEnergy Profile

10,098
Total Plants
1420.7 GW
Total Capacity
GasCoalNuclearWind
Top Fuels

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