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Water and Power Associates
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Hoover Dam - Wikipedia
Hoover Dam - Wikipedia
PHOTOS Hoover Dam construction begins in 1930 | Las Vegas Review-Journal
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Hoover Dam - Wikipedia
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The Greatest Dam in the World": Building Hoover Dam (Teaching with Historic Places) (U.S. National Park Service)
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Hoover Dam - HISTORY
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HISTORY - On #ThisDayinHistory 1930, construction of the Hoover Dam began. It would take 21,000 men a tireless five years to build what was the largest dam of its time, as well
1,111 Hoover Dam Construction Photos and Premium High Res Pictures - Getty Images