An image of the Boulder Dam. The name was officially changed to Hoover Dam in 1947. Text from postcard: "Upstream face of Boulder Dam. Note roadway which connects Kingman, Arizona, and Boulder City, Nevada. Six Companies Inc. Photo."
Black and white image of Hoover Dam under construction in Black Canyon. Arizona and Nevada can be seen on either side of the dam in this picture. Note: Boulder Dam was officially renamed Hoover Dam in 1947.