Executives from the Port of Montreal and representatives of industries such as construction say they are already starting to see significant volumes of cargo being redirected to other ports as the clock ticks down on a seven-month truce between the longshoremen and their employer that expires on March 21. The two sides were scheduled to meet with mediators on Wednesday. The Canadian Union of Public Employees-led Syndicat des Débardeurs, which represents some 1,125 workers at the port, agreed on the truce with the Maritime Employers Association, which represents ship owners and operators, last summer to negotiate a new labour agreement.