An artist's rendering of Hoover Dam. Printed text on front of card: "Hoover Dam, as it will look when completed, Boulder Canyon, Colorado River, near Las Vegas, Nevada."
An image of unidentified guests sitting and listening to speeches at Boulder Dam's decennial event. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
An image of unidentified guests sitting and listening to speeches at Boulder Dam's decennial event. Note: Boulder Dam was officially renamed Hoover Dam in 1947.