On the Laguna Indian Reservation and crossing over the Rio San Jose, #4 is on Santa Fe's north track passing over the black iron trestle at 62.7 eastbound.
P32BWH's 511 and 507 are assisted by a GP40 as they speed west with train #3, the Southwest Chief, at MP 66.5 at Laguna, NM on ATSF Gallup Subdivision on August 8, 1992.