Chief Joseph Dam and Rufus Woods Lake

Project Description

• Sub-basin: Middle Columbia
• Stream: Columbia River
• Location: Bridgeport, Washington
• Owner: Corps of Engineers, Seattle District: Chief Joseph
• Type of Project: Run-of-river
• Authorized Purpose: Power
• Other Uses: Irrigation, Recreation, Water Quality

Hydrologic Data

• Drainage area = 75,000 sq mi
• Maximum historical peak discharge = 725,000 cfs (1894)
• Maximum rate of change = No limit
• Lake Elevation
       Maximum pool = 958.8 ft
       Full pool = 956.0 ft
       Minimum pool = 930.0 ft
• Reservoir gross capacity (Elev. 946.0) = 518,000 AF

Powerhouse

• Number of main units..............................27
• Nameplate capacity................................2,069 MW
• Overload capacity..................................2,614 MW
• Station service units.......................................6 MW
• Hydraulic capacity.................................219,000 cfs