Arizona Spillway, Boulder Dam, Arizona/Nevada, USA, 1940. Postcard. View showing the surrounding steep cliffs. Also known as the Hoover Dam, the Boulder Dam was built in the Black Canyon of the Colorado River on the border between Nevada and Arizona between 1931 and 1936. The dam provides hydroelectic power to Arizona, Nevada and California.
World North and Central America United States Arizona
World North and Central America United States Nevada
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