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Drilling jumbos mounted on the back of a truck for lower portal Number 4. This first wood-frame jumbo was experimental, later they were steel pipe: photographic print, 1931 September 26

Level of Description

Item

Date

1931-09-26

Container

Folder 01,
To request this item in person:
Collection Number: PH-00267
Collection Name: Six Companies, Inc. Hoover Dam Photograph Collection
Box/Folder: Folder 01
English