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Construction; CONSTRUCTION, BRIDGE AND DRAWBRIDGE (INCLUDES RECONSTRUCTION/REHABILITATION); VOCATIONAL TRAINING, ALL TYPES (INCLUDING VOCATIONAL REHABILITATION AND TECHNICAL EDUCATION); WATER AND SEWER LINE AND RELATED STRUCTURES CONSTRUCTION (SPECIFICALLY: UNDERGROUND UTILITIES (VDOT SUBCONTRACTOR ONLY)); OTHER HEAVY AND CIVIL ENGINEERING CONSTRUCTION (SPECIFICALLY: ROADSIDE DEVELOPMENT (VDOT SUBCONTRACTOR ONLY)); SITE PREPARATION CONTRACTORS (SPECIFICALLY: CLEARING AND GRUBBING (VDOT SUBCONTRACTOR ONLY)); FABRICATED PIPE AND PIPE FITTING MANUFACTURING; BRICK, STONE, AND RELATED CONSTRUCTION MATERIAL MERCHANT WHOLESALERS (SPECIFICALLY: CONDUIT AND PIPE, CONCRETE, MERCHANT WHOLESALERS CULVERT PIPE, CONCRETE, MERCHANT WHOLESALERS GRAVEL, CONSTRUCTION, MERCHANT WHOLESALERS SEWER PIPE, CLAY (EXCEPT REFRACTORY) MERCHANT WHOLESALERS ONLY); OTHER CONSTRUCTION MATERIAL MERCHANT WHOLESALERS (SPECIFICALLY: CULVERT PIPE, METAL AND PLASTICS MERCHANT WHOLESALERS ONLY); WHOLESALE TRADE AGENTS AND B