Producing 4,000 horses, the prime mover under the blue and gold paint of lead engine #5260, powers the 6 axles that begin the total of 318 that this stack train is composed of.
An eastbound mixed freight passes under the ex-Western Maryland's Keystone Viaduct at Keystone, Pa. The Great Allegheny Passage hiking/biking trail now utilizes the Viaduct.