A WB ATSF intermodal descends around the top end of Tehachapi Loop lead by an SD45-2u that was delivered as #5642 and rblt 12-1986. The MKM initials on the lead unit mean it has been assigned to Morrison-Knudsen for maintenance on 4-1994. Trailing units are ATSF SD40-2 #5143 and an ATSF GP60.