Set of 12: Boulder Dam (Hoover Dam) Views 1940's
Additional Details:
|
Includes original envelope
Lowering Loaded Box Car, Boulder Dam Lowering loaded box car of Power House Machinery by Government 150 ton cableway at Boulder Dam. Upstream Face & Intake Towers, Boulder Dam, Lake Mead View of the 395 ft. Nevada Intake Towers and the upstream face of Boulder Dam as seen from Lake Mead. Boulder Dam Power House Nevada Wing Turbine-Generators Already four of the huge 115,000 h. p. turbine-generators of Boulder Dam power house are in operation, furnishing electricity to various points in Nevada and California. From the visitors' inspection gallery can be seen the entire main floor of the Nevada wing, more than two city blocks in length. DOWNSTREAM FACE, BOULDER DAM Downstream face of Boulder Dam showing power house and water falling higher than Niagara from canyon wall outlet works. Diversion Tunnel outlet in foreground. Arizona Spillway and Highway Bridge, Boulder Dam Two giant Spillways which will be used during flood periods when it is deemed advisable to lower the surface of the reservoir, are known as the Arizona and Nevada Spillways. They have an approximate length of 650 feet, 150 ft. wide at the top and an average depth of 125 ft. The largest battleship could be floated in this structure, if the shaft at the end of Spillway were dammed at the portal. Highway Across Boulder Dam, Connecting Nevada and Arizona The curved crest of Boulder Dam forms a highway and footbridge across Black Canyon, wide enough for two lanes of moving traffic and two parking lanes, with sidewalks on each side of the roadway. The Dam is a connecting link in the highway between Boulder City, Nevada and Kingman, Arizona, which will soon be one of the heaviest-traveled transcontinental highways in the United States. Visitors' Gallery Inside Boulder Dam Glistening tiled passageway 350 feet long, 528 feet below roadway crest of Boulder Dam. Reached by express elevator operating at 500 feet per minute, capacity 5000 lbs. or about 24 persons. Boulder Dam Upstream Face & Intake Towers, Arizona Side The Colorado River's waters form Lake Mead, impounded behind Boulder Dam. The dam's sheer 600-foot upstream face is 120 feet above the water surface, with spillways draining into 50-foot tunnels. Black Canyon, Boulder Dam Site, Colorado River View looking upstream through Black Canyon on the Colorado River at the site of Boulder Dam, as it appeared in the Spring of 1931. Lake Mead from Observation Point near Boulder Dam Observation Point is 3/8 mile from the main highway, 1 1/2 miles from Boulder Dam on the Nevada side. Lake Mead is approximately 8 miles wide at this point and extends through Boulder Canyon and Grand Canyon 115 miles upstream. The island to the left is called Hill 13, with Horseshoe Island beyond. Boulder Dam - Downstream Face In contrast to former mighty floods that once churned the Colorado River into a muddy brown torrent through Black Canyon, the waters now flow in needed volume through tunnels within the canyon walls, and are discharged under water into the power house tail-race or through by-pass valves down-stream from Boulder Dam. Transcontinental Highway between Boulder Dam and Kingman, Arizona Easy grades and banked curves feature the modern surfaced trans-continental highway linking Boulder Dam with Kingman, Arizona. This fine new road eliminates entirely the serpentine trail that formerly followed the river and wound through the foothills, and now provides a convenient and direct entrance to the Boulder Dam Recreational Area. Boulder Dam, Colorado River & Lake Mead Daily hundreds of visitors marvel at Boulder Dam, the world's greatest engineering achievement, a mighty 727-foot concrete barrier that has forever tamed the turbulent Colorado river. Its slashing silt-laden floods have given way to the sparkling blue waters of Lake Mead. This, the world's largest man-made lake, forms the nucleus for a unique National Playground of rugged scenic beauty. |
