Excavation of North American Aerospace Defense Command (NORAD) combat operation center (COC) on Cheyenne Mountain in Colorado. Inspection party examines sheared rock on ground level. They examine crack in a wall from platform on a crane boom. Cribbed section of a tunnel. Tunnel connecting passageway and chamber area.
Work men at work during the construction of Boulder Dam over the Colorado River in the United States. Rocks blasted in the Black Canyon for the end support of the dam. The work site of the dam. Men at the site. An aerial cable way carries workmen. Men in the cable way taken to their positions on cliffs. A man on a cliff prepares ropes. The workmen descend the cliffs with the help of the ropes.
In a 1970 television program, host Lee Marvin talks about Hoover Dam in the Black Canyon on the Colorado River, in between Arizona and Nevada in the United States. Historical scenes from construction of the dam in the early 1930s. Crane lifts a number of workers on a raised platform. Worker comes down the mountain with the help of rope. Workers walk across bridge. Dynamite explosion dislodges rock for dam construction. The Hoover dam under construction. Rock blasting in the dam's diversion tunnels. Construction workers eat food in Anderson's Mess hall. Views of workers dining in the mess hall and the kitchen during food preparation. Includes interviews with workers Joe Kine, Tommy Nelson, and Doug Moore who participated in construction. Later aerial views of the Hoover Dam around 1970.
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.
Scenic views in the early 1900s of the Rocky Mountains in the United States. Tourists go up and down a flight of stairs on the side of the South Cheyenne canyon wall near Colorado Springs, Colorado. The Seven Springs waterfall of the South Cheyenne Creek is seen, with tourists and a burro at the bottom of the canyon. (Now known as the Broadmoor Seven Falls.) View of the deep gorge cut by Seven Falls. A 1000 feet high granite gorge. A man walks over a deeply eroded rock formation over snow and ice (has appearance of glacier) west of the foothills as the mountains become steeper. Steel beams over a railroad track in a canyon beside a river at the mouth of a mountain tunnel.
Monuments ruins of native American Indian civilizations in Arizona, United States. People sit at the side of a waterway near a ruin. They view the ruined monuments. Canyons, ridges, rock formations and water streams in Oak Creek Canyon. A 1930s car on a road in Oak Creek Canyon. Tourists look at the ruins prehistoric trees turned to stone in the Petrified Forest National Park. Close-up views of trees in the petrified forest, and of various cross-sections cut and polished. Elevated view of colorful ridges in the Painted Desert on the Little Colorado River. View of Sunset Crater and dried rock of old lava flows from the volcano. Scenes of the Grand Canyon and a man and woman looking out over the Grand Canyon. Montage of scenes of farmers, American Indians, prospectors, and miners in Arizona. Mining operations and smoke rises from the chimney of a smelting factory. Saguaro cactus plants with the setting sun behind at dusk.
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