Vulcan Materials Company is a supplier of construction aggregates (primarily crushed stone, sand and gravel) and a producer of asphalt mix and ready-mixed concrete. The Company operates through four segments: Aggregates, Asphalt Mix, Concrete and Calcium. The Aggregates segment produces and sells aggregates (crushed stone, sand and gravel, sand, and other aggregates) and related products and services. The Company produces and sells asphalt mix in Alabama, Arizona, California, New Mexico, Tennessee and Texas. The Company produces and sells ready-mixed concrete in California, Maryland, Texas and Virginia. The Calcium segment consists of a single calcium operation in Brooksville, Florida, which produces and sells calcium products for the animal feed, plastics and water treatment industries. The Company has approximately380 active aggregates facilities. The Company sells aggregates that are used as ballast for construction and maintenance of railroad tracks.