CREW ARRIVED AT NORTH POLE MARATHON FACILITY TO SPOT 25 LOADS. UTILITY EMPLOYEE WAS INSTRUCTED TO BRING THE SPOTS INTO THE FACILITY. THE UE WAS PROVIDING PROTECTION OF THE POINT BY RIDING THE LEAD CAR. UPON ENTERING TRACK 3, THE UE HEARD METAL GRINDING AND STOPPED THE MOVEMENT. THE CARS IN TRACK 2 WERE FOULING TRACK 3