Powered by a pair of Union Pacific EMD SD90MAC-H 6,000 hp locomotives, a long southbound UP freight grinds upgrade out of Walong, California, climbing Tehachapi Pass on March 28, 2001. This area is a bit different now, as a second track goes through a cut just to the right of the Tunnel, essentially making it double track from the east end of Marcel to the west end of Walong.
The EMD SD (special duty) series are a strong and reliable kind of locomotive which still serve America's rails today. They have proved themselves reliable by clocking in several million miles of freight service over several decades.
