Hanson Pipe & Products is descended from the Gifford-Hill Pipe Company, which was formed in 1931 for the purpose of manufacturing concrete pipe for sewer and culvert construction and other associated uses. The company is a diversified manufacturer of concrete pipe and a variety of supporting products, such as manholes, drainage structures, box culverts, bridge components, retaining walls and concrete block. Maintaining offices in cities such as Grand Prairie, Texas. Hanson Pipe s plant locations in Texas, California, Arizona, Oklahoma, Louisiana, Florida, Virginia, Maryland, Minnesota, South Dakota and Ohio enables the company to serve customers throughout the United States. Among Hanson Pipe & Products clients are the State Departments of Transportation, major cities and counties, public authorities, the Army Corps of Engineers, major airports and numerous private entities.