Fall at Skagit Hydroelectric Project, Photo by Kevin Lidtka
Seattle City Light LARRY WEIS, General Manager and CEO
Boundary Hydroelectric Project
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Statistics

  • Year completed - 1967

  • River system - Pend Oreille River

  • Original investment - $94 million

  • Type of dam - double curvature, thin arch gravity dam

  • Height - 340 feet above bedrock

  • Length - 740 feet including spillways

  • Width - top, 8 feet; base, 32 feet

  • Average flow - 30,706 cubic feet/second

  • Drainage area - 25,200 square miles

  • Average Rainfall - 26.44 inches per year

  • Reservoir length - 17.5 miles

  • Reservoir storage - 5,500,000 acre-feet

  • Reservoir elevation - full, 1990 feet; max drawdown 40 feet

  • Average annual generation - 127 million kilowatt-hours

  • Equivalent number of NW homes served - 9,000

  • Number of generators - Six; four ~160 MW, and 2 ~200 MW

  • Installed capacity (nameplate rating) - 1040 MW


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    Suite 3200
    P.O. Box 34023
    Seattle, WA 98124-4023


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