US Army Corps of Engineers

John Day Dam and Lake Umatilla

Provisional Data Warning
Hydrologic Data: [Hourly] [8 Days Hourly] [Daily] [Prior Month] [Graph] [Query]
Water Quality Data: [High 12-hour Avg TDG] [% Spill] [Total Spill] [TDG graphs] [TDG csv] [Spillbays] [Forebay] [Tailwater]
Power: [Monthly Power Report]
John Day Fish Ladder John Day Spillway

Project Description

  • Sub-basin: Lower Columbia
  • Stream: Columbia River
  • Location: Rufus, Oregon
  • Owner: Corps of Engineers, Portland District
  • Type of Project: Storage
  • Authorized Purpose: Flood Control, Power, Navigation
  • Other Uses: Fishery, Recreation, Irrigation, Water Quality

Hydrologic Data

  • Drainage area = 226,000 sq mi
  • Maximum historical peak discharge = 1,240,000 cfs (1894)
  • Maximum change per hour = 200,000 cfs
  • Lake Elevation (NGVD29)
    Maximum pool = 276.5 ft
    Full pool = 268.0 ft
    Minimum pool = 257.0 ft
  • Usable Storage (257.0 to 268.0) = 534,000 AF

Powerhouse

  • Number of units = 16
  • Nameplate capacity = 2,160 MW
  • Overload capacity = 2,485 MW
  • Hydraulic capacity = 322,000 cfs

7 Day Project Status

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BUILDING STRONG®
U.S. Army Corps of Engineers, Columbia Basin Water Management Division
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