The union representing three-thousand C-N Rail conductors, train and yard workers is still in negotiations with management after threatening job action.
Without giving details, the Teamsters union says C-N plans to make changes to the current collective agreement that would ``permanently and irreparably impact workers.''
C-N would only say that both parties are working to avoid a walkout.
The union issued 72-hour strike notice on Saturday, putting it in a legal strike position early Tuesday.