View from the top of Boulder Dam (Hoover Dam), looking over construction, in the Black Canyon, Mohave County, Arizona, shows concrete forms, scaffolding and the power plant with mouldings for generators units. The 726 foot high, Bureau of...
Black Canyon (Ariz. and Nev.)--1930-1940.; Hoover Dam (Ariz. and Nev.)--1930-1940.; Mohave County (Ariz.)--1930-1940.; Dam construction--Arizona--Mohave County--1930-1940.; Dams--Arizona--Mohave County--1930-1940.
[between 1934 and 1936]
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