Diablo Dam (Wikipedia)Diablo Dam is one of three dams along the upper Skagit River in Whatcom County, Washington and part of the Skagit River Hydroelectric Project that supplies Seattle with some of its power needs. The dam was built in Diablo Canyon, a gorge of solid granite with vertical walls rising 160 feet (49 m) from the river bed, yet were less than 100 feet (30 m) apart. Construction began in 1927, and was completed in 1930. The dam began generating electricity in 1936.
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Washington Pass (Wikipedia)Washington Pass (el. 5477 ft./1669 m.) and Rainy Pass (el. 4875 ft./1486 m.) are two mountain passes on State Route 20 (North Cascades Highway) in the North Cascades mountains of Washington state. Rainy Pass is about 4 miles to the west of Washington Pass. The passes are typically closed between November and April due to heavy snowfall.