Bonneville Lock and Dam

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The project’s first powerhouse, spillway and original navigation lock were completed in 1938 to improve navigation on Columbia River and provide hydropower to the Pacific Northwest. A second powerhouse was completed in 1981, and a larger navigation lock in 1993. A Public Works Administration project of President Franklin D. Roosevelt’s New Deal, portions of Bonneville Lock and Dam Project were declared a National Historic Landmark in 1987.