Poured Concrete Foundation and Structure Contractors Highway, Street, and Bridge Construction Concrete Approach Slabs Bridge Railing and Barriers Reinforcement Bedding Materials Right-of-Way Monuments Curbs and Gutters Structural Concrete-Cast in Place Box Culverts Structural Concrete-Precast Box Culverts and Headwalls Drainage Structures and Other Incidental Construction Other Activities Related to Real Estate Water and Sewer Line and Related Structures Construction