Cofferdam (upper one), 1/4 - 1/2 mile upstream from Dam site. Dec. 25, 1932. Note on back: ""Electric Marion steam shovel on top of cofferdam. May have used shovel to lay down metal grating. - W. A. Davis.""

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."

Skip load of men being lowered into canyon by scaffolding.

Engineer's rendering of Hoover (Boulder) Dam.

A group of construction workers that made Boulder Dam get together to take a picture. The man in middle is boss of crew at Boulder Dam, Doc Lawson. All of the crew built/was in charge of center section of power house, machine shops, seismograph room, clock room & battery room. Merlin S. Murphy absent with injury. Taken the summer of 1935.

From the UNLV Libraries Single Item Accession Photograph Collection (PH-00171). Property of Walker R. Young, Construction Engineer; see documentation in Walker biography file.

From the UNLV Libraries Single Item Accession Photograph Collection (PH-00171). Work progresses on concrete portion of dam.