An image of men on the Arizona side of Boulder Dam watching as water discharges from the Nevada side jet flow gates (outlet works). The name was officially changed to Hoover Dam in 1947.
Painted postcard showing Lake Mead and Hoover (Boulder) Dam. Text on front of post card: "Lake Mead Flowing over Spillway Gates, Boulder Dam." Text on back of post card: "The thundering roar of falling tons of water shakes the Black Canyon when Lake Mead flood waters hurtle over the spillway and down the great 50-food tunnels to the river bed below."