An image of Rotary Club members having lunch at Boulder Dam. Earl Brothers is also present in this photograph. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

An image of Rotary Club members having lunch at Boulder Dam while an unidentified man gives a speech. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

An image of Rotary Club members having lunch at the Boulder Dam. Earl Brothers is also present in this photo. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Pg.98 #3487 Boulder Dam and Powerhouse, looking upstream from lower cofferdam. Oct. 28, 1935. Pg.98 #3500 Boulder Dam Switchyard, showing excavation and construction. Note Boulder Dam Highway in background. Oct. 28, 1935. Pg.98 #3501 Looking upstream in No.2 downstream plug, showing water conduit being placed. Oct. 28, 1935. Pg.98 #3506 Looking upstream toward No.3 downstream plug. Note clean-up operations, getting ready for carpenters. Oct. 28, 1935.

Machinery for construction of Boulder Dam, 1931-1936

Machinery for construction of Boulder Dam, 1931-1936

Machinery for construction of Boulder Dam 1931-1936