The construction of Boulder Dam under way and rocks blasted in the Black Canyon of the Colorado River in the United States.
United States USA Date:1936 Duration:2 min 1 sec Sound:NO SOUND
Boulder Dam under construction over the Colorado River in the United States. The Colorado River and work under way in the Black Canyon. Rocks on both sides of the river. Men in a boat bring supplies to the site. The site of work. Men cross the river on a bridge. Rocks of the canyon being blasted for providing foothold for roads and rail lines to the dam site.
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