(September 26, 2016, 9:27 AM EDT) -- RALEIGH, N.C. — The North Carolina Department of Environmental Quality (DEQ) on Sept. 23 announced that it reached a settlement with Duke Energy Carolinas LLC under which the company will pay $6 million to the state for violations associated with a coal ash spill at its power plant on the Dan River that resulted in groundwater contamination (In the matter of: Duke Energy Carolinas LLC, No. DV-2016-0017, NCDEQ, Rockingham Co.)....