Black and white photographic image of the view from the top of Hoover (Boulder) Dam. Automobiles can be seen parked along the curb and driving on the street. "On top of Boulder Dam" is written on the front of the postcard.

Illustration of a night view of Boulder Dam, now known as Hoover Dam. Caption reads: "Boulder Dam at night, Colorado River." "U.S. Bureau of Reclamation photo" is typed in the top left corner.

An image of people sitting at the head table at a Rotary Club luncheon at Boulder Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

An image of visitors going into the dam elevator during Boulder Dam's decennial event. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

An image showing a bird's eye view of cars driving on the crest of Hoover Dam. The text on the lower left corner of the image reads: Boulder Dam. Boulder Dam was officially renamed Hoover Dam in 1947.

Boulder City, panorama of houses, view from the water tank. The Boulder Theater building that contains the Boulder Dam Service Bureau and the Boulder Dam Hotel can both bee seen in the center of the picture.

Black and white image with the following printed description: "Boulder Canyon. Mr. and Mrs. Tyrone Power visit Boulder Dam. With them are Mr. Marion McKeen (Thompson Trophy Pilot) who flew the Powers to Boulder City, and R. B. Spearman who conducted the party through the powerhouse." Note: Mrs. Tyrone Power was the actress, Annabella. Also, Boulder Dam was officially renamed Hoover Dam in 1947.