221310 Water Supply and Irrigation Systems

236210 Industrial Building Construction (Primary)

236220 Commercial and Institutional Building Construction

237110 Water and Sewer Line and Related Structures Construction

237120 Oil and Gas Pipeline and Related Structures Construction

237310 Highway, Street, and Bridge Construction

237990 Other Heavy and Civil Engineering Construction

238110  Poured Concrete Foundation and Structure Contractors

238120  Structural Steel and Precast Concrete Contractors

238130  Framing Contractors

238190  Other Foundation, Structure, & Building Exterior Contractors

238390  Other Building Finishing Contractors

238910  Site Preparation Contractors

238990  All Other Specialty Trade Contractors

424710  Petroleum Bulk Stations & Terminals

447110  Gasoline Stations with Convenience Stores

447190 Other Gasoline Stations