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United States › Power plants › Hydroelectric plants › Washington

HYDROELECTRIC PLANTS

Alder

Alder is a 51.0 MW operating hydroelectric plant in Pierce County, Washington, operated by City of Tacoma - (WA).

Plant statusOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. OperatingDec 1945 (current stage)
  5. Closed (not yet reached)

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Generators

Each generating unit EIA lists at this plant.

UnitTechnologyCapacityStatusOnlineRetired / planned retirement
11Conventional Hydroelectric26 MW OperatingMay 1947
12Conventional Hydroelectric25 MW OperatingDec 1945

Plant details

Operator
City of Tacoma - (WA)
Location
Pierce County, Washington
Balancing authority
TPWR
Sector
Electric Utility
Capacity
Operating: 51.0 MW
First unit online
Dec 1945
EIA plant ID
3913

Location

46.8016, -122.3102

Nearby power plants

Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem