The heaviest train to ever cross Mullan Pass is stopped on the hill as the helper crew tries to get SD70ACe 4300 to load. After several failed attempts, the train moves up to Austin where it will cut in two additional units brining the total power for this 18,917 ton train to four head-end units, six mid-train units (5 working), and two rear-end DPU's. That's a lot of power!