Question: what materials were used to build the hoover dam?
Answer: The principal materials, all ofwhich were purchased by the government, were: Reinforcement steel, 45,000,000 pounds Gates and valves, 21,670,000 pounds Plate steel and outlet pipes, 88,000,000 pounds Pipe and fittings, 6,700,000 pounds or 840 miles Structural steel, 18,000,000 pounds Miscellaneous metal work, 5,300,000 ...