I had an hour to kill in Middlesboro, KY and drove out towards one of the tipples hoping to find a train. I was in luck. I got to watch the crew back half their train of mtys up to the tipple and get ready for loading. Some slightly older power pushing the cars. It made me wonder if they use these locos for loading then shuttling the loads up to Corbin where they put newer AC power on for the trip south to Georgia.