The view of cars parked along a street in front of a building containing multiple shops, including the Boulder Dam Service Bureau and the Theatre Candy Shop. Transcribed onto the large sign plastered across the top of the building: "Free Boulder Dam Motion Pictures. Visitors Welcome. Boulder Dam Service Bureau." Transcribed across the three smaller signs on the building, reading from left to right- First: "Boulder Dam Service Bureau. Souvenirs, Post Cards, Official Booklets, Rest Rooms." Second: "Double Feature - George O'Bien in "Wind Jammer," and Tex Ritter in "The Mystery of the Hooded Horsemen." " Third: "Theatre Candy Shop. Cold Drinks & Sandwiches."

Black and white image of a mud deposit at Hoover Dam. This site can be seen at mile 257, and a member of the survey crew displays a representative sample of one of the mud cubes formed to show the depth of the crevices. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Photograph of a catwalk during the Hoover (Boulder) Dam construction period.

An image of the Boulder Dam intake towers in the newly impounded Lake Mead, as seen from the Arizona side. Boulder Dam was officially renamed Hoover Dam in 1947.

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.

Pg.97 #3512 Looking upstream in Arizona Valve House. Note three gates and needle valves have been installed. Oct. 29, 1935. Pg.97 #3497 View from top of Boulder Dam, looking toward Power House, Valve Houses and lower portals of Diversion Tunnels. Oct. 28, 1935.

An image showing aerial view of Hoover Dam. Parts of the plane from which the image was taken are visible. Note: Boulder Dam was officially renamed Hoover Dam in 1947.