Boundary Dam, hydroelectric dam in Washington State, United States
Boundary Dam is a concrete structure that spans the Pend Oreille River and measures about 226 meters (740 feet) long. It houses a hydroelectric power station with turbines that generate electricity for the region and features spillway gates to manage water flow.
Construction was completed in 1967 and the facility initially operated with four turbines to supply power to Seattle. Two additional turbines were added in the 1980s to increase capacity and boost overall electricity generation.
The area around the dam offers quiet paths where you can view the water and structure from different vantage points. Informational signs and occasional guided tours help you understand how it operates and why it matters.
Power generation began on September 1, 1967, a full month before the official opening ceremony by Seattle's mayor. The project faced significant local opposition from miners and competing utility companies before ultimately proceeding with construction.
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