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
The Greatest Dam in the World": Building Hoover Dam (Teaching with Historic Places) (U.S. National Park Service)
Hoover Dam Construction History - Bechtel
Hoover Dam Construction History - Bechtel
Mega-dams, like Hoover, probably wouldn't be built today - Marketplace
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Building the Hoover Dam seen through rare photographs, 1931-1936 - Rare Historical Photos
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Water and Power Associates
43 Remarkable Photos Of Famous Things Being Built | Hoover dam construction, Dam construction, Hoover dam
PHOTOS Hoover Dam construction begins in 1930 | Las Vegas Review-Journal
Photos: Construction of Hoover Dam on the Colorado River in the 1930s
Construction on Hoover Dam Begins - HISTORY
Water and Power Associates
Hoover Dam - Wikipedia
Hoover Dam Construction History - Bechtel
The Greatest Dam in the World": Building Hoover Dam (Teaching with Historic Places) (U.S. National Park Service)