Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Construction of Hoover dam on Colorado River on the border of Arizona and Nevada.

Babcock & Wilcox Company at Hoover Dam construction site.

Angus standing under giant yucca near Prescott, Arizona.

Cars lined up at the shore of lower Lake Mead waiting for the carferry.