World Power Plants

Twin Reservoirs is a 2.2 MW hydroelectric power plant in the United States, operated by Walla Walla City of since 1988. Ranked #1177 of 1469 hydro plants in the United States. Its 2.2 MW represents 0.002% 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 Twin Reservoirs 3,095 times smaller. Nearby plants within 50 km include Lower Snake River Wind Energy Project (342.7 MW, Wind), Tucannon River Wind Farm (266.8 MW, Wind), and Hopkins Ridge Wind (156.6 MW, Wind). The facility is located in Washington State, approximately 300 km southeast of Seattle.

Capacity
2.2 MW
Commissioning Year
1988

38 years old

Owner
Walla Walla City of
Location
46.0883°, -118.2547°

United States of America, North America

Context & rankings
  • 7,811. largest of 10,098 plants in United States of America
  • #33,568 worldwide by installed capacity
  • #7,366 of 8,493 Hydroelectric plants worldwide
Age & fleet comparison

38 years in operation

Hydroelectric fleet average: 42.1 years

Operator portfolio

Walla Walla City of operates 1 plants totalling 2 MW

Regional density

28 plants within 100 km, 8,205 MW combined

Nearest plant: Chopin Wind LLC (28.2 km)

Location

Coordinates:: 46.088300, -118.254700
Open in Google Maps
Carbon Footprint

Zero Direct Emissions

Twin Reservoirs is a hydro power plant producing approximately 8 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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