(January 14, 2016, 2:45 PM EST) -- CHARLOTTE, N.C. — The energy company sued by an environmental group that contends that it is liable for contamination of groundwater in connection with its operation of a steam power station on Jan. 7 filed a brief supporting certification for an interlocutory appeal (Yadkin Riverkeeper, et al. v. Duke Energy Carolinas LLC, No. 14-00753, M.D. N.C.)....