An historic, 1930s photograph showing the building of the Hoover Dam aka Boulder Dam, Black Canyon, Colorado River, on the border between the states of Nevada and Arizona. This view shows men preparing explosives in front of a giant diversion tunnel used to allow the river to flow whilst construction takes place.

---

Size: 5906px × 3930px
Photo credit: © Colin Waters / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1930s, 6, 93, arch, arch-gravity, arizona, black, bor, border, boulder, building, bureau, bypass, canyon, city, colorado, companies, concrete, dam, diversion, electric, electricity, engineering, explosives, giant, gravity, hoover, hydroelectric, incorporated, irrigation, men, nevada, power, preparing, project, reclamation, river, route, service, tunnel, tunnels, water, workmen