The roar of struggling locomotives in notch 8 pierce the mid-morning silence as southbound loaded coal drag UP CATJO9 23 muscles up the 1.1% grade known as Logan Hill north Bill, Wyoming. Topped off with a fresh load of black diamonds at Cloud Peak Energy's Antelope Mine just to the north, this train is headed for the Joppa Steam Plant, a coal-fired power station owned and operated by Ameren near the town of Joppa, Illinois.