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United States › Power plants › Hydroelectric plants › Oregon

HYDROELECTRIC PLANTS

The Dalles

The Dalles is a 1,648 MW operating hydroelectric plant in Wasco County, Oregon, operated by USACE Northwestern Division.

Plant statusOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. OperatingJun 1957 (current stage)
  5. Closed (not yet reached)

This plant has generators at more than one stage; see the table below.

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Generators

Each generating unit EIA lists at this plant.

UnitTechnologyCapacityStatusOnlineRetired / planned retirement
5Conventional Hydroelectric90 MW OperatingOct 1958
15Conventional Hydroelectric86 MW Out of service, expected to returnFeb 1973
16Conventional Hydroelectric86 MW OperatingFeb 1973
17Conventional Hydroelectric86 MW OperatingMar 1973
18Conventional Hydroelectric86 MW OperatingMar 1973
19Conventional Hydroelectric86 MW Out of service long-termMay 1973
20Conventional Hydroelectric86 MW Out of service long-termJun 1973
21Conventional Hydroelectric86 MW Out of service, expected to returnNov 1973
22Conventional Hydroelectric86 MW Out of service, expected to returnDec 1973
1Conventional Hydroelectric78 MW OperatingOct 1957
2Conventional Hydroelectric78 MW OperatingNov 1957
3Conventional Hydroelectric78 MW OperatingFeb 1958
4Conventional Hydroelectric78 MW OperatingMay 1958
6Conventional Hydroelectric78 MW OperatingNov 1958
7Conventional Hydroelectric78 MW OperatingFeb 1959
8Conventional Hydroelectric78 MW OperatingMay 1959
9Conventional Hydroelectric78 MW Out of service, expected to returnNov 1959
10Conventional Hydroelectric78 MW OperatingNov 1959
11Conventional Hydroelectric78 MW OperatingFeb 1960
12Conventional Hydroelectric78 MW OperatingMay 1960
13Conventional Hydroelectric78 MW OperatingAug 1960
14Conventional Hydroelectric78 MW Out of service, expected to returnNov 1960
F1Conventional Hydroelectric14 MW Out of service, expected to returnJun 1957
F2Conventional Hydroelectric14 MW Out of service, expected to returnJul 1957

Plant details

Operator
USACE Northwestern Division
Location
Wasco County, Oregon
Balancing authority
BPAT
Sector
Electric Utility
Capacity
Operating: 1,648 MW
Out of service: 172 MW
First unit online
Jun 1957
EIA plant ID
3895

Location

45.6140, -121.1346

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