An historic, 1930s photograph showing the building of the Hoover Dam aka Boulder Dam , Black Canyon, Colorado River, on the border between the U.S. states of Nevada and Arizona. This view shows 'high fliers', construction men who worked on the rocks attached to ropes and safety lines. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/an-historic-1930s-photograph-showing-the-building-of-the-hoover-dam-aka-boulder-dam-black-canyon-colorado-river-on-the-border-between-the-us-states-of-nevada-and-arizona-this-view-shows-high-fliers-construction-men-who-worked-on-the-rocks-attached-to-ropes-and-safety-lines-image338017681.html
RM2AHX101–An historic, 1930s photograph showing the building of the Hoover Dam aka Boulder Dam , Black Canyon, Colorado River, on the border between the U.S. states of Nevada and Arizona. This view shows 'high fliers', construction men who worked on the rocks attached to ropes and safety lines.
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