"The Phoenix Cement Company, headquartered in Phoenix, operates a cement plant in Clarkdale in the U.S. state of Arizona. Built in 1959 by the American Cement Company to make cement for construction of the Glen Canyon Dam on the Colorado River, the Clarkdale plant produces Portland cement, fly ash, and gypsum for a regional market.The first load of cement for the dam left Clarkdale by truck in October 1959, and shipments continued for nearly five years."@en . "1959Z"^^ . . . . . . . . . "Phoenix Cement Company"@en . . .