The Boulder Dam / Hoover Dam, a concrete arch-gravity dam in the Black Canyon of the Colorado River on the border between the Nevada and Arizona 1930s.

The Children's New Illustrated Encyclopedia 1941.

Size: 3987px × 5474px
Photo credit: © Michelle Bridges / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: 1930s, arizona, black, boulder, canyon, colorado, dam, hoover, neveda, reservior, river, water