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  • Pumpcrete Machine
  • Concrete
  • A pumpcrete machine in action. Concrete is dumped into this machine which pumps it through pipelines to wherever desired. The pumpcrete method was used to backfill around the penstock pipes and to backfill the twist adjustment slots.
  • Frank A. Banks Collection
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  • Penstock X-Ray Machine
  • Penstocks--Washington (State)--Grand Coulee Dam; Equipment & personnel transportation; Spillways--Washington (State)--Grand Coulee Dam
  • A 200,000-volt X-ray machine photographing the circumferential welded seams of a main unit penstock section. One picture covers 16 inches of the seam; the penstock liner is rotated so that successive 16-inch sections of the seam are X-rayed. The...
  • Frank A. Banks Collection
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  • "Concore" Drilling Machine
  • Drilling & boring machinery
  • Core samples told inspectors, engineers, and project planners information regarding foundation strength, excavation levels, and even the best sites suited for construction of Grand Coulee Dam, Power plant, and related facilities.
  • Frank A. Banks Collection
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  • Fuller Kinyon Cement Unloading Machine
  • Concrete
  • Two workers use a cement pump to deliver cement into the new el. 1180 mixing facility.
  • Frank A. Banks Collection

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