Project Description
- Stream: Snake River
- Location: Matthaw, 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
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Maximum historical peak discharge:
Unregulated = 409,000 cfs (1894)
Regulated = 295,000 cfs (1894) -
Lake Elevation (NGVD29)
Maximum pool = 548.3 ft
Normal pool = 540.0 ft
Minimum pool = 537.0 ft - Maximum rate of change per hour = 70,000 cfs
Powerhouse
- Number of units = 6
- Nameplate capacity = 810 MW
- Overload capacity = 930 MW
- Hydraulic capacity = 130,000 cfs
7 Day Project Status
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