Oversized postcard with three scenes from Hoover Dam: people standing in front of the downstream face of the dam; automobile traffic on the dam crest, showing the tops of two of the intake towers; the downstream face of the dam and the power houses. Caption: "Greetings from the world's highest dam, Hoover Dam." On back: "P29348. Plastichrome by Colourpicture Publishers, Inc., Boston, Mass."

Black and white image of Hoover Dam under construction. This view is looking down into the upper cofferdam area from the rim of the Arizona side of Black Canyon. Also visible are a temporary earth diversion dam and steel sheet piling extending out from the Nevada abutment and marking the upstream toe of the cofferdam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Duplicate images of visitors standing in line to board the visitors' elevator at Hoover Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Black and white image of diversion tunnel #2 on the Nevada side of Hoover Dam. This image shows the groundwork for the tunnel. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

An image of visitors boarding an elevator leading to Hoover Dam's powerhouse. Boulder Dam was officially renamed Hoover Dam in 1947.

An image of visitors boarding an elevator leading to Hoover Dam's powerhouse. Boulder Dam was officially renamed Hoover Dam in 1947.

Label at the bottom of the photo: "Dusk view of Hoover Dam from Arizona side."