Led by Rio Grande’s first Tunnel Motor, SD40T-2 No. 5341, an eastbound Rio Grande freight climbs the steep 3-percent grade of Tennessee Pass at Mitchell on a July 1984 morning. A total of 20,850 horsepower of EMD locomotives is powering the head end of this train; behind No. 5341 is a SD45, two GP40s, a GP40-2, a GP30 and lastly, another SD40T-2. Combined with the 18,600 h.p. worth of manned helpers cut in mid-train, this freight required almost 40,000 h.p. to climb the pass!