NSR/PSD concerns noted at Big Brown and Martin Lake coal fired generating stations. On August 8, 2019, the parties entered into a dismissal agreement, with the United States and Sierra Club moving to dismiss their appeals, and all parties agreeing to bear their own costs and fees. Luminant agreed to withdraw its motion for fees and costs in the district court. On August 9, 2019, the Fifth Circuit dismissed the United States and Sierra Clubs appeals pursuant to the parties motion.