An SD40 and GP9 hold back a westbound freight as they descend Sand Patch Grade a couple of miles west of Sand Patch, Pa., on the former Baltimore & Ohio. The bridge overhead carried the Western Maryland main line, which was rendered redundant when B&O and WM came under common Chessie System control.
David Dudjak photo
Chessie System freight at Keystone Viaduct
| Last updated on January 6, 2021