Vulcan Materials Company is one of the leading producers of construction aggregates in the United States. It specializes in sand, gravel and crushed stones. The company also manufactures construction materials, such as asphalt, ready-mix concrete and cement. Founded in 1909, Vulcan Materials Company is a publicly traded corporation with annual sales revenue of more than $2 billion and a work force of over 11,000 employees. It operates nearly 330 aggregate production and related facilities in approximately 22 U.S. states, the District of Columbia, Mexico and the Bahamas. In addition, the Vulcan Materials Company Foundation makes charitable contributions for educational and environmental stewardship projects.