Terminal employers in Canada estimate that an ongoing dockworker strike in British Columbia will cause a logjam of 250,000 containers at the major ports of Vancouver and Prince Rupert by the end of July.

Some 7,500 dockers representing the International Longshore & Warehouse Union (ILWU) of Canada have walked the picket line since 30 June in a fight for a new labour contract that offers higher wages and control over terminal upkeep.