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United States › Power plants › Hydroelectric plants › Oregon

HYDROELECTRIC PLANTS

John Day

John Day is a 2,025 MW operating hydroelectric plant in Sherman County, Oregon, operated by USACE Northwestern Division.

Plant statusOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. OperatingAug 1968 (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
1Conventional Hydroelectric135 MW Out of service, expected to returnAug 1968
2Conventional Hydroelectric135 MW OperatingSep 1968
3Conventional Hydroelectric135 MW Out of service, expected to returnNov 1968
4Conventional Hydroelectric135 MW OperatingDec 1968
5Conventional Hydroelectric135 MW OperatingFeb 1969
6Conventional Hydroelectric135 MW OperatingMar 1969
7Conventional Hydroelectric135 MW OperatingApr 1969
8Conventional Hydroelectric135 MW Out of service, expected to returnJun 1969
9Conventional Hydroelectric135 MW OperatingAug 1969
10Conventional Hydroelectric135 MW Out of service long-termSep 1969
11Conventional Hydroelectric135 MW OperatingMar 1970
12Conventional Hydroelectric135 MW OperatingMay 1970
13Conventional Hydroelectric135 MW OperatingDec 1970
14Conventional Hydroelectric135 MW Out of service, expected to returnJan 1971
15Conventional Hydroelectric135 MW OperatingOct 1971
16Conventional Hydroelectric135 MW OperatingDec 1971

Plant details

Operator
USACE Northwestern Division
Location
Sherman County, Oregon
Balancing authority
BPAT
Sector
Electric Utility
Capacity
Operating: 2,025 MW
Out of service: 135 MW
First unit online
Aug 1968
EIA plant ID
3082

Location

45.7164, -120.6941

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