No. 14-5305 07-19-2016 Mingo Logan Coal Company, Appellant, v. Environmental Protection Agency, Appellee. Paul D. Clement, Washington, DC, argued the cause for the appellant. Jeffrey M. Harris, Nathan A. Sales, Robert M. Rolfe, George P. Sibley III, Richmond, VA, Virginia S. Albrecht and Deidre G. Duncan, Washington, DC, were with him on brief. Matthew Littleton, Attorney, United States Department of Justice, argued the cause for the appellee. John C. Cruden, Assistant Attorney General, Aaron P.