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The Boundary Hydroelectric Project, located on the Pend Oreille River in Northeastern Washington, supplies more than one-third of Seattle City Light's power. Discover the Boundary Hydroelectric Project nestled in the foothills of the Selkirk Mountains and positioned along the banks of the scenic Pend Oreille (pronounced "pond-ah-ray") River.

Our 299,000 horsepower turbines and electrical generating facilities produce clean, renewable energy. Schedule a guided tour to experience the Visitors' Gallery located deep inside a massive limestone cavern and enjoy expansive views at the Vista House and observation deck.