Arcelormittal Dofasco will shut down its “number one” coke plant in Hamilton by march 2015.

The plant is 62 years old. The steel maker will maintain it at a cost of about $10 million a year until it’s phased out. It will move permanent employees into other positions.

Arcelormittal Dofasco faces 13 charges from the Ministry of Environment for exceeding standards for visible emissions last year. The emissions came from the company’s coke ovens. The company says it will continue to operate its number two and three coke making facilities.

Editor’s Note: A previous version of this post used an incorrect image. This has been removed.