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Glen Canyon Dam and Powerhouse, Arizona. Completed in 1964, this 580 ft. high concrete arch dam is backing up the waters of the Colorado River in Lake Powell. Glen Canyon Bridge, highest steel arch bridge in the world is 700 ft. above the river and is 1,2

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Glen Canyon Dam and Powerhouse, Arizona. Completed in 1964, this 580 ft. high concrete arch dam is backing up the waters of the Colorado River in Lake Powell. Glen Canyon Bridge, highest steel arch bridge in the world is 700 ft. above the river and is 1,2