The national Mine Mill organization eventually merged into the Steelworkers in 1967 -- most of the Mine Mill locals remaining in Sudbury followed .
Local 598 voted against the merger and remained an independent autonomous local until becoming part of the Canadian Auto Workers in 1993 .
The national Mine Mill organization eventually merged into the Steelworkers in 1967 -- most of the Mine Mill locals remaining in Sudbury followed , although Local 598 voted against the merger and remained an independent autonomous local until becoming part of the Canadian Auto Workers in 1993 .