An image of Parker Dam on the Colorado River at the California-Arizona border, 155 miles downstream from Hoover Dam. Parker Dam is commonly referred to as "the deepest dam in the world" because 73% of the dam's structural height is positioned below the original river bed. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

A view from the Arizona side railroad tracks of open valves at Hoover Dam outlet works.

Lowering box car of power house machinery via govenment 150-ton cableway, Boulder Dam

A painted photo depicting Lake Mead and Hoover (Boulder) Dam. Text on front of post card: "Lake Mead in Black Canyon, Boulder Dam", "Boulder Canyon Project of the Business of Reclamation"; Text on back of post card: "Lake Mead is quite narrow, just above Boulder Dam, yet more than 500 feet deep, where it is confined between the somber cliffs of Black Canyon gorge. Beyond the gorge the waters spread extensively over the desert valleys to form a vast lake 115 miles in length, with a shoreline of more than 550 miles - the largest man-made lake in the world. Comfortable cruisers make regular scheduled excursions on Lake Mead."

An artist's color rendering of Lookout Point at Hoover Dam. Text printed on back of postcard: "Lookout Point has been the popular vantage point where thousands of sightseers have viewed with amaxed and intense interest, the progress and development in the building of this spectacular and enormous project. The view from the Nevada side, shows the downstream face of the Dam, the rugged cliffs in Arizona, and Fortification Mountain in the distance."

Downstream face of Boulder Dam at night

Photographic postcard showing the newly completed Hoover Dam and intake towers. Description given on bottom of photograph: "Boulder Dam upstream face and intake towers. Note newly constructed Highway which connects Kingman, Arizona with Boulder City, Nevada."