Illustration on postcard of men overlooking the reservoir site and automobiles including a Union Pacific truck on the road. "Overlooking Resevoir Site" is typed on the top left hand corner.

Postcard with an illustration of men working by the entrance a diversion tunnel. The caption reads: "Entrance to of one of the four 56 foot diversion tunnels."

Bridge to gravel pit from Nevada to Arizona about 10 miles up from dam. Note on back: "Railroad went across bridge, not completed in this photo. - W.A. Davis."

Portion of railroad leading to Hoover [Boulder] Dam. Workers can be seen in the background, with wheelbarrows and various materials in the foreground.

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.