Black and white image of men standing next to"cover wagons" in Boulder City. Nine cover wagons, each having a capacity of 48 men, were used to transport workmen from Boulder City to Black Canyon for the construction of the Hoover Dam. These buses were canvas-covered with side curtains that could be raised during hot weather. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Retouched photo of the recently constructed Hoover (Boulder) Dam and surroundings.

The caption on the back of the image reads, " "Like grandfather, like father, like son" is an appropriate title for this photograph of Ray Lyman Wilbur II and Ray Lyman Wilbur III, reading the name of Ray Lyman Wilbur I on a bronze plaque at the Hoover Dam. As noted on the plaque, Ray Lyman Wilbur I was secretary of the Interior during President Hoover's administration and played a major role in administrative matters pertaining to the construction of Hoover Dam. His son and grandson, shown here, were visitors to the dam recently and were given a specially-conducted tour by the Bureau of Reclamation's guide service. The father and son reside at 1808 Indiana Street, Vallejo, California. The plaque is on the left hand side of the entrance to the Hoover Dam's Arizona elevator tower through which a third of a million visitors leave the dam and power plant each year following guided tours of this mammoth structure on the Colorado River between Nevada and Arizona. Guided tours of the dam and power plant, starting at the elevator tower on the Nevada side, are available daily to the public between the hours of 8 a.m. to 5 p.m. Ca. 1950's (Bureau of Reclamation photo)."

This series of photographs documents the historic water overflow at Hoover Dam as seen from the Arizona side of the dam. Taken in August of 1983, this overflow marked the first time the spillways were used during a flood. After initially being filled, the spillways were tested once in August of 1941.

This series of photographs documents the historic water overflow at Hoover Dam as seen from the Arizona side of the dam. Taken in August of 1983, this overflow marked the first time the spillways were used during a flood. After initially being filled, the spillways were tested once in August of 1941.

This series of photographs documents the historic water overflow at Hoover Dam as seen from the Arizona side of the dam. Taken in August of 1983, this overflow marked the first time the spillways were used during a flood. After initially being filled, the spillways were tested once in August of 1941.