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A short time later train 823 comes into Williams Jct. on the south main. The train has engines 5137, 5138, 2304, and 2773.
The train crew on train 823 was getting close to the maximum hours it could work. So a relief crew was sent out and the train swapped crews at Williams Jct. You can see the crew van at the far end of the old passenger platform. Disk 72