Titles read: "Cliff Climbers of Industry. Boulder Dam U.S.A. where the builders of this mighty work defy sudden death - ".
Boulder Dam, Colorado, United States of America (USA).
Various shots of men arriving at Boulder Dam (formerly known as Hoover Dam) and working on the construction of the massive dam. The men are carried across the canyon in a skip and work on the side of the canyon with just a rope around their waists for safety. Good shots of Boulder Dam under construction.