Black and white image of Hoover Dam with the following printed description: "Upstream face of the dam as seen from portal of construction tunnel on Nevada side of Black Canyon." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
An image of a burro standing on a cliff in Black Canyon overlooking part of Hoover Dam and Lake Mead. The intake towers and traffic on the the road over the dam are visible in the background. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image showing the completed construction of Diversion Tunnel No. 4, one of four 50-foot diversion tunnels at Hoover Dam. Construction men can be seen at the base of the tunnel. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Ray Lyman Wilbur, Secretary of the Interior, at a ceremony which inaugurated construction on the Boulder City branch of the Los Angeles and Salt Lake Railroad, signaling the beginning of the Boulder Canyon Project, later known as Hoover Dam. From left to right, the men pictured include: Senator Key Pittman of Nevada; Governor Fred Balzar of Nevada; Carl Gray, President of Union Pacific Railroad system; Secretary Wilbur holding the Nevada silver spike; and Senator Tasker L. Oddie of Nevada. Note: Boulder Dam was officially renamed Hoover Dam in 1947.