An image of Boulder Dam with open jet flow gates (outlet works). The name was officially changed to Hoover Dam in 1947. Bridge is visible in the foreground.

An image of General Electric power generators under construction at Hoover Dam. Boulder Dam was officially renamed Hoover Dam in 1947.

Close up of sand classifier in the gravel plant used for the construction of Boulder Dam, now called Hoover Dam. Site Name: Hoover Dam (dam)

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 Boulder Dam. Earl Brothers is also present in this photograph. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Black and white image of an aerial view looking upstream through the Nevada spillway. At the left are two panels of the overflow weir under construction. Note: Boulder Dam was officially renamed Hoover Dam in 1947.