A dragline beginning to remove clay from below the frozen barrier. Drainage well E-5, in which a heavy flow of quicksand was encountered, is shown in the upper left corner. Top of frozen barrier is at elev. 855 and the water surface in the pool below is at elev. 823. The frozen barrier is about 20 feet wide, 100 feet long and 45 feet deep. The bottom of the crevice is approximately 75 feet below the top of the barrier.; Scope and content: Photograph from Volume Two of a series of photo albums documenting the construction of the Grand Coulee Dam and related work on the Columbia Basin Project.

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Photo credit: © Tango Images / Alamy / Afripics
License: Licensed
Model Released: No

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