IT IS APPROXIMATELY 5 P.M. on a hot June day outside of the city of Wilkes-Barre, Pa. Milepost 164 marks the location, an unassuming place, lined by dual track, once of the Lehigh Valley Railroad (LVRR, or “the Valley”), surrounded by the Pocono Mountains. Birds chirping and a slight breeze from the southeast fills the air, a quiet rustle from the forest’s trackside edge and out walks a black bear with, thankfully, no cubs in tow. While some might confuse this for a scene out of Snow White, faintly in the distance a resonant, machine-gun-paced thunderous roar builds. A few minutes later, the roar comes to a crescendo, filling each surrounding valley like the world’s largest surround sound system. Its source is a Reading T-1 4-8-4 locomotive, a 1945 product of…