Thomas W. Hill

National Stone, Sand & Gravel Association is a non profit organization which advocates for the aggregates industry. It advances public policies that protect and expand the safe, environmentally responsible use of aggregates that build America’s infrastructure and economy. The company is headquartered in Alexandria, VA.

Continental Cement Co. LLC manufactures and markets cement. It produces and supplies cement for a variety of end uses in the construction industry, including private residential and non-residential construction and public infrastructure projects. The firm secures, processes, and blends hazardous and nonhazardous waste materials, which is primarily processed into alternative fuels in the cement manufacturing process. The company was founded in 1903 and is headquartered in Chesterfield, MO.

Part of Summit Materials LLC, Summit Materials Corporations I, Inc. is a leading vertically integrated materials-based company that supplies aggregates, cement, ready-mix concrete, and asphalt in various locations. The company is based in Denver, CO and offers customers a single-source provider of construction materials and related downstream products in the public infrastructure, residential, and non-residential end markets. The company believes in combining vertical integration with an interdependent company structure to provide increased efficiencies and economies of scale while empowering operating companies to make local, well-informed decisions. Summit Materials uses barges and railroads to conserve resources and reach more customers.