US Army Corps of Engineers

Ice Harbor Dam and Lake Sacajawea

Provisional Data Warning
Hydrologic Data: [Hourly] [Tailwater] [8 Days Hourly] [Daily] [Prior Month] [Query]
Water Quality Data: [High 12-hour Avg TDG] [% Spill] [Total Spill] [TDG graphs] [TDG csv] [Temperature String] [Spillbays] [Forebay] [Tailwater]
Power: [Monthly Power Report]
Ice Harbor Dam 2 Ice Harbor Dam 1

Project Description

  • Stream: Snake River
  • Location: Pasco, Washington
  • Type of Project: Run-of-river
  • Authorized Purpose: Power, Navigation
  • Other Uses: Fishery, Recreation, Irrigation, Water Quality

Hydrologic Data

  • Drainage area = 103,200 sq mi
  • Maximum historical peak discharge:
    Unregulated = 409,000 cfs (1894)
    Regulated = 295,000 cfs (1894)
  • Lake Elevation (NGVD29)
    Maximum pool = 446.0 ft
    Full pool = 440.0 ft
    Minimum pool = 437.0 ft
  • Maximum rate of change per hour = 20,000 cfs

Powerhouse

  • Number of units = 6
  • Nameplate capacity = 603 MW
  • Overload capacity = 693 MW
  • Hydraulic capacity = 106,000 cfs

7 Day Project Status

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