Four Corners Materials is a part of Oldcastle Materials, which is one of the leading integrated suppliers of asphalt, aggregates and read-mixed concrete products the United States. Oldcastle Materials also offers construction and paving services and manages a staff of more than 20,000 employees in over 40 U.S. states. It supplies nearly 165 million tons of aggregates from approximately 640 facilities. The company also handles government-related projects at the federal, state and local levels. Additionally, it produces more than 50 million tons of asphalt at over 450 facilities. Oldcastle Materials is a division of CRH, an international building materials group.