This photograph has three images. The first one (0272_0049) shows the No.2 diversion tunnel with floor and side walls concreted during the Hoover Dam Project (Taken by Oakes). The inscription reads "Trucking mud to short hoist above that transfers the mud further in, reinforcing with re-bar where spillway 'intersects' diversion tunnel." The second one (0272_0050) reads, "Big Gamble - using 8 yd. Bucket, dumping mud in small face pour. Notice all that rebar. This is where the dam takes off from the powerhouse. Did this once too often - at a much higher elevation. Cable broke at tail tower, bucket no longer under control. Knocked out the panel and slide down the face of the dam and slowly came to a halt. The doors came open and dumped the mud. Lot of excitement at the pour. Someone noticed a small light down by the bucket. Investigating, they found a bell boy striking matches. He had ridden the bucket all the way down." The third image (0272_0051) reads "View of powerhouse. (x) shows where turbines will be installed." (Bureau of Reclamation photo)

Black and white image showing an upstream view of Black Canyon from the Hoover Dam construction site. In the distance, Fortification Hill can be seen along with tunnel lining forms near the inlet portals of the Nevada diversion tunnels. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Pg.92 #3450 President Roosevelt dedicating Boulder Dam. Sept. 30, 1935. Pg.92 #3479 View taken from adit, showing No.1 pour in downstream No.2 diversion tunnel plug. Cribbing for use as temporary pipe supports. Sept. 27, 1935. Pg.92 #3475 Nevada Intake Tower roofs. Note concrete shingle arrangement. Sept. 27, 1935. Pg.92 #3472 View of Switchyard, showing control house, foundations and general excavation. Sept. 27, 1935.