AK Steel Holdings Corporation was an American steelmaking company headquartered in West Chester Township, Ohio.The company also provided carbon and stainless steel tubing products, die design and tooling, and hot- and cold-stamped components.[6] In 1914, the company began publishing the monthly ARMCO bulletin "to facilitate an interchange of thought and suggestion, and to create a better understanding of the activities and problems of the Operating Department employees.[11] In 1993, the company moved its headquarters to Pittsburgh, Pennsylvania and renamed itself AK Steel Holdings reflecting its Armco roots and sizable investment by Kawasaki.[14] In 1996, Graham made the decision to spend $1.1 billion to construct a new steel production facility in Rockport, Indiana.[21] In 2014, the company acquired steel-making assets, including a coke-making facility and interests in 3 joint ventures that process flat-rolled steel products in Dearborn, Michigan, from Severstal for $700 million.On June 27, 2000, the United States Environmental Protection Agency (EPA) issued an Emergency Order pursuant to the Safe Drinking Water Act, Clean Air Act and the Clean Water Act to AK Steel's Butler Works in Butler, Pennsylvania concerning the nitrate/nitrite compounds being released into the Connoquenessing Creek, an occasional water source for the Borough of Zelienople, alleging that AK Steel had failed to properly dispose of hexavalent chromium.[32] In 2006, AK Steel reached a settlement to compensate for polychlorinated biphenyl (PCB) contamination in Middletown, Ohio.[33] AK Steel was listed #1 on the Mother Jones Top 20 polluters of 2010; dumping over 12,000 tons of toxic chemicals into Ohio waterways.[34] Based on 2014 data, the Political Economy Research Institute ranked AK Steel 53rd among corporations emitting airborne pollutants in the United States.According to the EPA's Annual Toxics Release Inventory, of the 23 million pounds of chemicals discharged into the river in 2013, more than 70 percent came from AK Steel.However, U.S. District Court Judge Michael R. Barrett rejected PLS's contention and cleared Ryder and AK to proceed with the use of these carriers.