Initial processes in the construction of Boulder Dam in the Black Canyon of the Colorado River in the United States.
United States USA Date:1936 Duration:4 min 29 sec Sound:NO SOUND
The beginning of the construction of Boulder Dam (later the Hoover Dam) on the Colorado River in the United States. Rocks on the side of the river. A boat in the river. A map shows the course of the Colorado River through different states of the country. The river causes floods in towns and farming districts of California. The dam site in the Black Canyon, where the river forms a boundary between Nevada and Arizona. A map shows the dam site. Materials at the dam site. Trains bring supplies. Power lines to the dam site. Men assemble materials for construction work. Men at a survey. Workmen come to the dam site in trucks from other states.
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