McNary Dam, Hydroelectric power station and dam on Columbia River, Oregon and Washington, United States
McNary Dam extends 2245 meters across the Columbia River, connecting Umatilla County in Oregon with Benton County in Washington State.
Construction of the dam began in 1947 under the U.S. Army Corps of Engineers, with final completion of all generating units in 1957.
The structure received its name in honor of Senator Charles L. McNary of Oregon through the Flood Control Act of 1945.
The dam maintains two fish ladders for salmon migration, a navigation lock system, and generates 980 megawatts of hydroelectric power.
During large-scale electrical failures, McNary Dam provides black start capability to restore power to other regional generation facilities.
Location: Umatilla County
Location: Benton County
Inception: 1947
Length: 2,245 m
GPS coordinates: 45.93556,-119.29806
Latest update: May 14, 2025 19:25
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