Pipes lowered into a canyon and pipe sections installed inside tunnels at Boulder Dam site in the United States.
United States USA Date:1933 Duration:1 min 44 sec Sound:NO SOUND
Transportation and installation of steel pipes during the construction of Boulder Dam on the Colorado River in the United States. A pipe section is lowered into a canyon by cables. Cars carry the pipe sections into a tunnel. Workmen watch the procedure. Men at the entrance of the tunnel. The pipe sections are taken into the tunnel for installation. Work underway inside the tunnel. The workmen work on pipe sections. A man climbs up the section by a ladder. Other men at work on the section.
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