Autumn is slowly starting to take affect as southbound loaded coal drag UP CNAPW 21 works the small hills south of Akron, Illinois as it heads down Union Pacific's single-tracked Peoria Subdivision. This 18,000 ton coal train from the North Antelope Mine in Wyoming's Powder River Basin is headed straight for NRG Energy's Powerton Power Plant, a coal-fired generating station situated along the Illinois River south of Pekin, IL. Just like this one, these Powerton trains run with a mix of mostly CWEX (Commonwealth Edison Co.) and MILX (General Electric Rail Services Corp.) marked coal cars with a few TGNX (NRG Power Marketing LLC) ones thrown in.