John Day Dam, Hydroelectric power station and dam on Columbia River, Oregon and Washington, United States.
The John Day Dam extends 1719 meters across the Columbia River with 16 turbines generating 2160 megawatts of electrical power for the Pacific Northwest region.
The United States Army Corps of Engineers started construction of the John Day Dam in 1959, completing this substantial infrastructure project in 1971.
The power station received its name from a mountain man who participated in the Astor Expedition through the Columbia River territory.
The facility maintains a fish ladder system that enables salmon populations to navigate upstream and downstream through the Columbia River system.
Lake Umatilla, formed by the dam, stretches 123 kilometers along the Columbia River, supporting irrigation, flood control, and recreational activities.
Location: Washington
Location: Oregon
Inception: 1959
Length: 1,719 m
GPS coordinates: 45.71640,-120.69400
Latest update: May 27, 2025 13:19
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