(January 26, 2021, 1:56 PM EST) -- RALEIGH, N.C. — Duke Energy Progress LLC and Duke Energy Carolinas LLC on Jan. 22 entered into an agreement with North Carolina Attorney General Josh Stein, the public staff of the North Carolina Utilities Commission and the Sierra Club in which the energy companies agreed to not pass on to customers the $1.1 billion the companies will spend to remediate contamination from coal ash....