Holcim's cement plant in Ste. Genevieve County, Mo., opened in August while cement demand in the U.S. remains weak. Capacity of the plant 30 miles south of St. Louis is 4 million metric tons per year. Holcim has closed plants in Clarksville, Mo., and Dundee, Mich., and has mothballed plants in Mason City, Iowa, and Artesia, Miss. Visit www.holcim.com/us.