This unit group includes excavating, grading, paving, drilling and blasting contractors who own and operate their own business. This unit group also includes supervisors who supervise and co-ordinate the activities of workers classified in the following unit groups: Crane Operators (7371), Drillers and Blasters – Surface Mining, Quarrying and Construction (7372), Water Well Drillers (7373), Longshore Workers (7451), Material Handlers (7452), Heavy Equipment Operators (Except Crane) (7521), Public Works Maintenance Equipment Operators and Related Workers (7522), Railway Yard and Track Maintenance Workers (7531), and Public Works and Maintenance Labourers (7621). They are employed in a wide range of establishments; places of employment are indicated in the above unit group descriptions.
