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First "jumbo" for pouring concrete lining in top or arch section of tunnels was erected on "beach" in front of tunnel Number 2 and transported across river in sections by cableway: photographic print, 1932 May 20
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
View showing forms set for first side-wall pour in upper portal of tunnel Number 3. Form is 80-feet long and consists of four 20-foot sections bolted together. Note size of man in upper right: photographic print, 1932 April 29
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
Excavation for benches for movable cableway towers being carried on, near Lookout Point: photographic print, 1932 August 14
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
Workmen loading holes with dynamite, in preparation for blast on cableway bench excavation: photographic print, 1932 August 15
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
"Powder-monkeys" load dynamite cartridges with electric primers at isolated points: photographic print, 1932 August 15
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
Preparing for blast which demolished Lookout Point, to make way for cableway bench excavation: photographic print, 1932 August 14
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
One of four photographs, forming a panorama of operations being carried on at canyon rim, on Nevada side. Photo was taken from Arizona spillway site. To the left is shown Black Canyon Highway. High level mixing plant will be located behind fill on the road. To the right is shown highway extension road to Nevada spillway. Note shovel boom projecting at former site of Lookout Point: photographic print, 1932 August 12
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
One of four photographs, forming panorama of operations being carried on at canyon rim, on Nevada side. Photo was taken from Arizona spillway site. To the left is shown Black Canyon Highway. High level mixing plant will be located behind fill on the road. To the right is shown highway extension road to Nevada spillway. Note shovel boom projecting at former site of Lookout Point: photographic print, 1932 August 12
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
Looking upstream into Number 1 plug, showing the placing of the high pressure valves and method of pouring: photographic print, 1934 December 19
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
Form work on the Nevada valve house bench: photographic print, 1935 January 02
Level of Description
Item
Archival Collection
Six Companies, Inc. Hoover Dam Photograph Collection
Archival Component
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