Black and white image of the completed Hoover Dam with water seen spilling through the Arizona penstock outlets. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

A view of open valves at Hoover Dam outlet works.

Spillway on Arizona side of the Boulder Dam (now called Hoover Dam) construction site, showing steel gates in position. Site Name: Hoover Dam (dam)

Black and white image of President Franklin D. Roosevelt delivering the dedication address at Hoover Dam. The sign underneath him reads: "Franklin D. Roosevelt; President of the United States; Dedicating the Boulder Dam - Sept. 30, 1935." Handwritten text on the image reads: "Photographed by Walter J. Lubken, Six Com. Inc." Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Pg.96 #3549 Looking south toward Boulder Dam Switchyard, showing construction and excavation. Nov. 26, 1935. Pg.96 #3531 Looking upstream in lower No.3 Plug. Note one of pipe sections in place. Nov. 25, 1935. Pg.96 #3551 Looking upstream along Nevada approach to Boulder Dam. Note rubble wall being built and excavation for tower footings. Nov. 26, 1935. Pg.96 #3534 Looking upstream in lower No.2 plug, showing pipe in place. Nov 25, 1935.

Pg.65 #3118 Looking down on top of Boulder Dam. Note the bucket pouring the roadway on "R" block at elev. 1232. Feb. 25th, 1935. Pg.65 #3126 Telephoto view of the Arizona Valve House, from the Nevada side. Feb. 25th, 1935. Pg.65 #3141 A view of Boulder Dam Lake and reservoir area from Observation Point. March 4th, 1935. Pg.65 #3127 Telephoto view of the Nevada Valve House, from the Arizona side. Feb. 25th, 1935.

An artist's color rendering of Hoover (Boulder) Dam construction midway through progress. Printed text on front of postcard: "Looking upstream, Colorado River, Boulder Dam."