Working at Hoover (Boulder) Dam. The machinery shown include a water pump and power shovel. Note on back: "Not taken by W. A. Davis. That day the river came up and flooded tunnel on Arizona side. This shot shows pumpking the water out with a large sump pump. - James J. Hester, W. A. Davis' son-in-law, 1992."
Aerial view of bedrock base of canyon and first forms poured for Dam. Note on back: ""Keywest being put in place on bedrock. Lowest point of construction on the dam. - W. A. Davis.""
Man riding cable hook to Colorado River basin, above No. 3 and 4 tunnels. May 9, 1933. Note on back: ""Man riding on the cable hook was a violation of mining laws. - W. A. Davis.""
Welding/Blacksmith shop on Arizona side of Hoover Dam. Note on back: "Men sharpening steel tools; pieces 4 to 20 ft. long. Were mostly all star bits. No welding done here. Ingersollrand (Ingersoll-Rand?) equipment sharpening station. - W. A. Davis."