The construction of the Boulder Dam, later the Hoover dam, in Boulder City, Nevada. Construction of the Boulder Dam underway at the dam site in the Black Canyon of the Colorado River. Equipment at work at the site. A crane transports movable sections and place them on the side walls of the dam. An operator at the controls of the crane. Rocky side walls of the canyon. An officer watches the construction work. The tunnel on the dam through which water flows. Onlookers and officials beside the flowing water as the final gates of the dam are closed in the grand opening of the dam. The construction material at the site. Aerial views of the construction site.
Boulder City at the time of the construction of Boulder Dam (later Hoover Dam) on the Colorado River in the United States. A desert area with mountains in view. Houses and buildings in Boulder City. A park with many trees. A walkway in a park. A building at a distance. The Office of the Bureau of Reclamation. A lawn around the building. A stores building. A vehicle near the building. Arcades in front of houses provide protection from the sun. Workmen's houses and buildings in clusters. Dormitories for single workmen. Two men at work in a workmen's mess. Several workmen seated at tables in a mess hall. Passenger motor trucks in front of the workmen's houses. The workmen get into the trucks. The trucks drive on a path. The workmen get down from the trucks at the dam site.
Space research from the ground with a Scatter Radar. National Bureau of Standards laboratories in Boulder, Colorado. The Central Radio Propogation Laboratory. Cars parked outside. Hills in the background. Dr. Kenneth Bowles and a colleague work on a formula. Animation: Incoherent scatter of radio waves by electrons in the ionosphere. Transmission of powerful pulsed radio signal in a narrow beam. The beam penetrates the ionosphere and excites the free electrons. The scatter a weak signal which is detected by a sensitive antenna, and the signal comes back to Earth. Remaining portions of a sensitive antenna at the pioneering field site in Havana, Illinois. Dr. Ken Bowles and other scientists decide on a site. Animation: The magnetic equator and lines of the magnetic field. Pulsed radar signals and lines of force on the monitor. Animation: Chemical composition of the Earth's atmospheric gases. The scientists decide on Lima in Peru, due to its proximity to the magnetic equator and U.S. Lima, Peru: Buildings, guards, churches, plazas and boulevards in Lima including the Government Palace in Lima with guards in front, the Catedral de Lima (Catheral of Lima) and the Plaza Mayor de Lima . Construction work in Lima. Cars on a market street. People on the sidewalk. Shipping and port facilities in Callao, Peru. Workers unload goods. People board a Braniff International aircraft. Housing facility in the Lima suburb of Miraflores.
Documents the excavation and construction of the Boulder Dam (Later named Hoover Dam). Boat in a river at the Black Canyon. A man points to the map of United States. Water floods in agricultural district. River in a deep valley between cliffs. Map points out Black Canyon of the Colorado River, on the border between Arizona and Nevada. Deserts of South West. Excavating mountains by truck. Cargo train runs on track. Men work in factories. Industrial equipment. Engineers and surveyors at construction site. Small town (Boulder City) built to house employees. Various buildings of town. Building housing the officers of Pacific administration. Traffic on street and gardens outside houses. White cottages in town. Cooks prepare food in kitchen. Men served in large dining hall. Passenger trucks loaded with workers, moves for dam site. Workers leave trucks at dam site.
A streamlined passenger express train passes by at the Boulder Dam (later Hoover Dam) construction site at Boulder City near Las Vegas, Nevada. The train on a railway track. Interior of the train. Men stand in the train and watch outside. The Colorado River amidst the mountains. View of the countryside. People stand near the railway track. The train passes across a bridge and views of the dam construction underway in Black Canyon.
Mixing plants and transportation of materials around the dam site during the construction of Boulder Dam on the Colorado River in the United States. The mixing plants at the Boulder Dam site. Huge concrete mixers in the plant. A man near an automatic machinery which controls the mixing of ingredients as well as records every operation. An operator near the control deck directs the entire mixing cycle. A man sets the machinery. Different types of machinery in the mixing plant. Ingredients loaded from hoppers onto conveyor belts. The conveyor belts carry the material and unload it into rotary mixers. A man oversees the procedure. The rotary mixers in the plant. A man near the rotary mixers. Different types of containers used to transport concrete. Men at work on the truck carrying the containers. The concrete mixers and other fixtures in the plant.