A view of operations at block 40. The railroad for delivery of concrete is shown to the right, on top of cofferdam, the partially completed conveyor to be used for filling cofferdam cells appears on the right, two stiffleg derricks used for handling concrete buckets are shown below and two Whirley cranes, mounted on traveling gentries to the left. The massive timber bracing across block 40 is shown below and cofferdam cells designed to tie in with the dam appear at both ends of block 40. The west tower of the suspended sand and gravel conveyor rises above the derrick booms.; Scope and content:
A view of operations at block 40. The railroad for delivery of concrete is shown to the right, on top of cofferdam, the partially completed conveyor to be used for filling cofferdam cells appears on the right, two stiffleg derricks used for handling concrete buckets are shown below and two Whirley cranes, mounted on traveling gentries to the left. The massive timber bracing across block 40 is shown below and cofferdam cells designed to tie in with the dam appear at both ends of block 40. The west tower of the suspended sand and gravel conveyor rises above the derrick booms.; 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.
Size: 3947px × 5065px
Photo credit: © Alpha Stock / Alamy / Afripics
License: Licensed
Model Released: No
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