A labour dispute that's rolled on more than a year will be resolved this month if locked-out Teamsters agree to a new deal with Rocky Mountain Railtours.

Rod Blackburn, secretary-treasurer of Teamsters Local 31 said Thursday bargaining committees reached a tentative deal this week that must be ratified by members who work as on-board attendants.

Rocky Mountaineer has operated largely as usual since the lockout in June last year using replacement workers. It is federally regulated and not affected by provincial laws banning replacement workers in labour disputes.

Blackburn said he doesn't know how many on-board attendants will be willing to come back to the job, or how many to expect for the ratification vote in Vancouver Saturday.

"There's 108 members when we started and that's who's affected."

The union plans to unveil terms of the deal at the ratification meeting.

Company spokesman Ian Robertson called it a fair deal for all that come as the train plans expansion to the United States.

"It represents the state of the tourism industry. It's a deal that ensures Rocky Mountaineer will be successful for years to come."

The train that operates between Vancouver, the Rockies and Calgary overnights in Kamloops. It began its season in late April and typically wraps up in October.