Black and white photograph of penstock pipe section during Hoover Dam construction at Black Canyon.

An image of two small children looking up at the Winged Figures of the Republic sculptures at the Hoover Dam on the day of the dam's dedication. Artist Oskar J. Hansen created the bronze sculptures.

An image of unidentified men in a boat on Lake Mead during the Boulder Dam decennial event. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

A shot of an unidentified man in a suit lying against a tree, presumed to be somewhere near Hoover Dam; the man is possibly a member of the Boulder City Rotary Club.

p.20 #1411 - p.20 #1412 These pictures together with two on opposite page, form panorama of operations being carried on at canyon rim, on Nevada side. Photo was taken from Arizona Spillway site. To the left is shown Black Canyon Highway. High level mixing plant will be located behind fill on the road. To the right is shown highway extension road to Nevada Spillway. Note shovel boom projecting at former site of Lookout Point. Aug. 12, 1932. p.20 #1451 Three hundred boxes of dynamite were used in spectacular blast which demolished Lookout Point. Picture taken from new Look Point, on Black Canyon Highway. Aug. 16, 1932. p.20 #1452 Blasting usually scheduled for 11:30 a.m., and billowing dust dislodged from canyon rim completely fills the canyon. Aug. 16, 1932.

Pg.28 #2653 View of Boulder Dam and the Nevada Intake Towers, taken from the Arizona side. "Monkey Slide" down Nevada abutment of Dam shown in center. April 28th, 1934. Pg.29 #2630 Looking upstream in Black Canyon, from the Nevada side, showing Boulder Dam and the Arizona Intake Towers in center. Arizona Spillway shown at upper right. Himix Plant at lower left, and Government Head Tower at lower right. April 17th, 1934 Pg.29 #2643 Unloading 81/2 ft. I.D. Valve House outlet pipe, with the Government Cableway. View taken on the Nevada Side, looking upstream. April 24th, 1934. Pg.28 #2625 Track layout above Himix and Cement Blending Plants, showing bins where rock and sand are dumped. April 17th, 1934.

Six Companies' scrip retrieved from a metal box which had been dumped into the Colorado River after the use of the scrip was discontinued.