Ice Harbor Dam and Lake Sacajawea

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
       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