On January 1, 2012, Rio Tinto’s aluminium subsidiary Alcan locked out 780 members of United Steelworkers at its smelter and refinery in Alma, Qu├ębec. The company refuses to negotiate limits on contract work.
See http://www.minesandcommunities.org/article.php?a=11463&l=1.
See also Rio Tinto’s lockout of Alma workers looks set to drag on,
http://www.mineweb.com/mineweb/view/mineweb/en/page504?oid=144916&sn=Detail&pid=92730.