An image of the plaque beneath the American flag at Hoover Dam with an inscription which reads, "It is fitting that the flag of our country should fly here in honor of those men who, inspired by a vision of lonely land made fruitful, conceived this great work and of those others whose genius and labor made that vision a reality." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of the construction phase of the Boulder Canyon Project, also known as Hoover Dam. Excavation for the Hoover Dam construction substation by the Nevada-California Power Company is visible. Note: Boulder Dam was officially renamed Hoover Dam in 1947.