A view of the gravel plant, showing the live storage of screened aggregate and sand in the foreground. Strange pile for raw aggregate in the background. Site Name: Hoover Dam (dam)
Before completion of cofferdam on Colorado River. Canyon showing start of fill for cofferdam. Oct 3, 1932. Note on back: ""Crowding river over prior to installation of Coffer Dam. Then diverted river through diversion tunnels. - W. A. Davis.""