President Franklin D. Roosevelt stands watch on the left as two trumpeteers start the dedication ceremony for the Boulder Dam Opening of the Spillways.
Illustration of Boulder Dam, later called Hoover Dam, construction. Caption reads: "A close-up, showing construction detail, Boulder Dam, Colorado River."
High scalers at Hoover Dam, with the Colorado River visible in the left side of the photo. Located on the back of the postcard is a handwritten description.