This Day in History: 07/07/1930 - Building of Hoover Dam

In a This Day in History video, learn that on July 7, 1930, construction began on the Hoover Dam. Twenty-thousand unemployed laborers happily took on the job, but it was a grueling and dangerous task between the scorching desert heat and constant dynamite blasts. When finished, Hoover was the largest dam in the world, standing 726 feet high.

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