Black and white aerial image of several high scalers at work at the Hoover Dam construction site, specifically in the location for the Arizona-side intake towers. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of President Herbert Hoover and official party during an inspection tour of the Boulder Canyon Project. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image with the following printed description: "View showing extension work on Nevada Spillway Tunnel #2 at Hoover Dam. Work performed by Guy F. Atkinson Company of San Francisco, California." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the following printed text: "First 8 cubic yard batch of concrete being placed in Boulder Dam proper." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the accompanying description: "Placing concrete in block at mid-section of Dam. Eight cu. yd. bucket handled by cableway is in use." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the following printed description: "Evaporation tower for dam precooling system located on downstream cofferdam. View from Nevada outlet house bench." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the following printed description: "Upstream face of the dam as seen from portal of construction tunnel on Nevada side of Black Canyon." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the following printed description: "View looking upstream in the Nevada turbine gallery. The runner for turbine N-2 has been placed and the wicket gates are about to be set." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the following printed description: "View of Memorial Day crowds waiting to visit the powerplant. Note persons holding tickets ready for guide to collect. Roof of cashier's booth may be seen beyond awning." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam with the following printed description: "View of 50-foot diameter tunnel below Arizona Tunnel Plug outlet works with Stoney Gate at end of tunnel lowered." Note: Boulder Dam was officially renamed Hoover Dam in 1947.