A Six Companies freight barge at the lower portals. (9-26-31)

Marion electric shovel directly over the dam site during construction of the Government Highway (R. G. LeTourneau Co.) 9-26-31

Bucyrus Erie shovel excavation for Site No. 3 compressor plant (Nevada side). June 2, 1931- Black Canyon.

Shovel excavation of a blasted rock cut along the edge of Black Canyon for the Government Highway. (June 2, 1931)

Upper portal of the Six Companies railroad tunnel no. 1. (8-9-31)

Six Companies railroad grade above railroad tunnel No. 1 showing the proposed location of the "low-mix" concrete mixing plant. (8-9-31)

Beauties of the desert. Four desert postcards. "A few varieties of desert vegetation"; "Sand verbenas and primroses on the desert"; "In a desert of saguaros, giant cacti"; "Desert yuccas, or spanish bayonets"