dworshak dam
Instead of trucking the tons the rock to a crushing plant, an innovative method was devised to simplify the process. Contractors tunneled into the mountain, creating a vertical chute and carving out a cave. Inside this cave, which was about 87 feet long, 34 feet wide and 102 feet high, they installed the crushing plant.

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Photo by: hannah mitchell |  VIRIN: 230717-A-QM295-0005.JPG