Seven Switchers.
Two Union Railroad (URR) trains with seven total MP15DC locomotives are seen on the trestles east of the US Steel Co. Edgar Thompson Works. On the upper level, no.s 23, 24, 27, and 31 wait for signal indication to proceed across the Monongahela River, while in the background no.s 11, 14, and 22 wait to shove their train down into the yard.
