Rinker Materials Hydro Conduit, a subsidiary of the Rinker Group of Australia, is a leader in the United States construction and building materials industry. It is one of the largest producers of concrete block and one of the largest producers of pipe, aggregate, ready-mixed concrete and cement in the United States. Its products and services include aggregate, asphalt, building materials, cement, drywall and acoustical materials, environmental and technical services, export services, masonry products, pipe, precast, ready-mix and transportation services. The company operates in approximately 30 states and maintains more than 380 locations worldwide. Rinker also partners with the March of Dimes as one of its primary corporate charitable recipients. Established in 1926, Rinker Materials Hydro Conduit maintains a facility in Henderson, Nev.