As the concrete was poured, it was measured in cubic yards. Landmarks in Dworshak’s construction were marked every time a million cubic yards were poured. Contractors poured the first million cubic yards of concrete by May 28, 1969. By October 24, there were two million cubic yard of concrete poured. By the end of construction, in the summer of 1973, 6.6 million cubic yards of concrete had been poured.