Ross Dam, Hydroelectric arch dam in Whatcom County, United States.
Ross Dam is an arch dam that spans the Skagit River and holds back a large reservoir. The structure generates electricity and sits within a protected recreation area in the Cascade Mountains.
Construction began in 1937 under the original name Ruby Dam and was completed in 1949. The project was part of developing hydroelectric power in the region.
The dam operates within Ross Lake National Recreation Area, forming part of North Cascades National Park Complex while providing power for Seattle residents.
A hiking trail leads to the dam with moderate elevation gain and offers views of the structure and reservoir. Visitors should wear sturdy shoes and be prepared for mountain weather conditions.
The reservoir water extends across the border and reaches areas in Canada. This cross-border extent makes it a remarkable piece of infrastructure in the boundary region.
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