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Night view of the gravel plant taken near the first scalping screen, 1932 February 26
Archival Collection
Archival Component
Gravel plant live storage of screened aggregate and sand, 1932 March 02
Archival Collection
Archival Component
Machine shop and warehouse group of buildings surrounded by material storage yards, 1932 March 11
Archival Collection
Archival Component
Interior of Six Companies machine shop showing equipment to handle heavy machine work, 1932 March 11
Archival Collection
Archival Component
Looking upstream at Black Canyon and foot bridges, 1932 March 12
Archival Collection
Archival Component
First 40-foot slab of concrete poured in lining of the diversion tunnels, 1932 March 18
Archival Collection
Archival Component
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