Cleveland Cliffs to Acquire ArcelorMittal USASteelton PA EAF rail production facility with 1 million tons annual steelmaking capacity Riverdale IL Compact strip mill 1 million tons annual thin slab casting and rolling capacity Finishing Columbus OH Hot dip galvanizing facility with million tons annual finished capacity Conshohocken PA Steel plate finishing facility million tons annual capacity Double G Coatings MS Hot dip