The Dalles Dam and Lake Celilo

Project Description

• Sub-basin: Lower Columbia
• Stream: Columbia River
• Location: The Dalles, Oregon
• Owner: Corps of Engineers, Portland District
• Type of Project: Run-of-river
• Authorized Purpose: Power, Navigation
• Other Uses: Fishery, Recreation, Irrigation, Water Quality

Hydrologic Data

• Drainage area = 237,000 sq mi
• Maximum inflow (unregulated) = 1,240,000 cfs (1894)
• Maximum change per hour = 150,000 cfs
• Lake Elevation (NGVD29)
  Maximum pool = 182.3 ft
  Full pool = 160.0 ft
  Minimum pool = 155.0 ft

Powerhouse

• Number of main units = 22
• Nameplate capacity = 1,780 MW
• Overload capacity = 2,052 MW
• Fishwater units = 28 MW
• Station service units = 6 MW
• Hydraulic capacity = 375,000 cfs

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