This photograph depicts an aspect of the activity conducted by Southern Pacific employees and contractors after the derailment of a Southern Pacific train. The reopening of a mainline or branch mainline was paramount after such an event.
A Southern Pacific track construction crew is standing in the clear, waiting to resume work to replace the existing crossing diamond and to install other trackage which is a part of the project.
A photograph of an Amtrak train operating over newly installed crossing diamonds at Tower 105 in San Antonio, Texas. Southern Pacific's construction crew is waiting in the clear so it can return to work after the train has passed through the area. The photograph was taken by Mike McGinley.
Maintenance of the ballast layer directly below the ties is an essential part of a healthy track structure, as ballast degrades over time and becomes increasingly fouled reducing its ability to drain, provide adequate load bearing support, and withstand vertical, lateral, and longitudinal forces. Southern Pacific used specially trained crews who operated undercutter equipment to restore ballast that had become fouled.
The excavated material could either be fully discarded or screened and returned to the track, with only the finer parts of the ballast not being recycled.
Southern Pacific tie gang working with a scarifier inserter on the San Antonio Division. This mechanical device dramatically sped-up the removal of existing ties and insertion of new ties in their place.