World Power Plants

Alder is a 50 MW hydro power plant in the United States of America, operated by the City of Tacoma since 1946. Ranked #308 of 1469 hydro plants in the United States. Its 50 MW represents 0.04% of the country's total hydro capacity of 117,947 MW. The largest hydro plant in the United States is the Grand Coulee Dam at 6,809 MW, making Alder 136.2 times smaller. Within 50 km, the nearest plants are Frederickson Power LP (318.3 MW, Gas), Mossyrock (300 MW, Hydro), and Frederickson (177.8 MW, Gas). The facility is located in Washington State, approximately 50 km south of Seattle.

Capacity
50 MW
Commissioning Year
1946

80 years old

Owner
City of Tacoma - (WA)
Location
46.8016°, -122.3102°

United States of America, North America

Context & rankings
  • 2,933. largest of 10,098 plants in United States of America
  • #13,085 worldwide by installed capacity
  • #3,166 of 8,493 Hydroelectric plants worldwide
Age & fleet comparison

80 years in operation

Hydroelectric fleet average: 42.1 years

Operator portfolio

City of Tacoma - (WA) operates 7 plants totalling 717 MW

Regional density

44 plants within 100 km, 6,697 MW combined

Nearest plant: LaGrande (3.5 km)

Location

Coordinates:: 46.801600, -122.310200
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Carbon Footprint

Zero Direct Emissions

Alder is a hydro power plant producing approximately 175 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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