p.21 #1506 Blast on Cableway bench excavation, on Arizona side, above dam site. Picture taken from lower portal of Railroad Tunnel No.1. Aug. 24, 1932. p.21 #1457 Picture of blast at same place shown above, taken from opposite, on Black Canyon Highway. Aug. 16, 1932. p.21 #1507 Huge billows of rock and dust pour over canyon rim and descend to river below. Aug. 24, 1932. p.21 #1456 Blast on Arizona intake tower excavation, which has filled canyon with smoke and dust. Upper steel suspension bridge shown in background. Aug. 16, 1932.

p.22 #1450 Looking across reservoir area, which will be submerged when Hoover Dam is completed. Flat-topped hill in center of picture will form a small island and ridge in foreground will be submerged. Aug. 15, 1932. p.22 #1446 Visitors to project are struck with multiplicity of dish pans used as reflectors, which are scattered all over project where night work is carried on. This is crew that installs them. Aug. 15, 1932. p.22 #1484 High scalers perched on bench 1000 ft. above river prepare anchorages from which workmen will be suspended by ropes in scaling canyon walls for penstock tunnel adits. Aug. 22, 1932.

Pg.30 #2638 Interior view of Poser House block A-7, showing reinforcing steel and pipe layout. April 25th, 1934. Pg.30 #2634 View of Poser House block No. A-7, from the lower Arizona construction unit, showing form work and pouring arrangement. April 25th, 1934. Pg.30 #2660 Looking upstream in Black Canyon, showing general view of the Power House layout, taken from the Nevada Valve House bench. April 28th, 1934. Pg.30 #2629 General view of Himix and Cement Blending Plants, with unloading track and aggregate bins above. April 17th, 1934.