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A service of Arizona State Library, Archives and Public Records, a division of the Secretary of State. Arizona Memory Project

Glen Canyon Dam and Powerhouse, Ariz. This key structure on the upper Colorado River is 580 ft. above the river level and created 186 mile-long Lake Powell. The Diversion Tunnel and 4 Butterfly Valves discharge water for testing purposes only. Glen Canyon Bridge, highest steel Arch in the world, is 700 ft. above the river. (Caption given by Josef Muench)

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