 Materially, building the dam would have required 15,000,000 cubic yards (11,470,000 m3) of concrete aggregate, 2,900,000 cubic yards (2,220,000 m3) of rock fill, and another 1,700,000 cubic yards (1,300,000 m3) of various other types of fill. Engineers suggested that some of the material could be found at the site, but the remainder would have to be brought from outside sources.
