(September 21, 2016, 3:28 PM EDT) -- BILLINGS, Mont. — ExxonMobil Pipeline Co. on Sept. 21 agreed to pay $12 million to the federal government and State of Montana to compensate for natural resources damages to the Yellowstone River that occurred following an oil spill in July 2011 (United States of America, et al. v. ExxonMobil Pipeline Company, No. 16-cv-143, D. Mont.)....