- Bridge, Tunnel, and Elevated Highway Construction
– sic code 1622 / 75 companies - Heavy Construction, NEC
– sic code 1629 / 201 companies - Highway and Street Construction, Except Elevated Highways
– sic code 1611 / 435 companies - Water, Sewer, Pipeline, and Communications and Power Line Construction
– sic code 1623 / 440 companies