PRLX #4834 is seen leading 36T to Allentown south on the Upper Lehigh Line recently after being painted into C&O #4834. Sadly this paint scheme only lasted a few weeks due to copyright infringements.
The EMD SD (special duty) series are a strong and reliable kind of locomotive which still serve America's rails today. They have proved themselves reliable by clocking in several million miles of freight service over several decades.