I've heard of Corman, never seen them in action, just Hulchers. We own 1/2 mile of frontage on the CN mainline going to the tunnel at Port Huron. Shrit happens, never been on our property, but close.
Watching Hulchers work is organized chaos.....unreal how fast they can clear cars out and rebuild track. CN has everything in place, local companies drop what they are doing, head to Pontiac for ballast and rail sections.....it gets on site asap. Then, hurry up and wait.
Since it's the railroad, nothing matters. Hulchers moves without permits, everything is taken care of after the fact. Springtime weight restrictions.....lmao, they don't exist for railroad infrastructure.
Ed