World Power Plants

Dam No. 4 Hydro Station1.9 MW Hydroelectric

HydroRenewableVerified: Jul 2026

Dam No. 4 Hydro Station is a 1.9 MW hydro power plant in the United States, operated by PE Hydro Generation LLC since 1947. Ranked #1233 of 1469 hydro plants in the United States. Its 1.9 MW represents 0.0016% of the United States' total hydro capacity of 117,947 MW. The largest hydro plant in the United States is Grand Coulee Dam at 6,809 MW, making Dam No. 4 3,579.9 times smaller. Nearby plants include Dickerson (933 MW, Coal), Stonewall (812 MW, Gas), and Dickerson Generating Station (326 MW, Gas). The facility is located in Maryland, approximately 50 km northwest of Washington, D.C.

Capacity
1.9 MW
Commissioning Year
1947

79 years old

Owner
PE Hydro Generation LLC
Location
39.4931°, -77.8269°

United States of America, North America

Context & rankings
  • 8,404. largest of 10,098 plants in United States of America
  • #34,809 worldwide by installed capacity
  • #7,565 of 8,493 Hydroelectric plants worldwide
Age & fleet comparison

79 years in operation

Hydroelectric fleet average: 42.1 years

Operator portfolio

PE Hydro Generation LLC operates 5 plants totalling 9 MW

Regional density

74 plants within 100 km, 6,548 MW combined

Nearest plant: Maryland Solar (12 km)

Location

Coordinates:: 39.493100, -77.826900
Open in Google Maps
Carbon Footprint

Zero Direct Emissions

Dam No. 4 Hydro Station is a hydro power plant producing approximately 7 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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