BNSF 3878 (ET44C4) waits for service at the Denver engine servicing facility.

A variety of light and heavy power waits for service or assignments at the BNSF engine facility in Denver, Colorado.

BNSF 3878, a relatively new ET44C4, catches the evening light with a follow GE as the two rest on the rear of a southbound manifest in the siding at Guernsey.

BNSF Tier 4 No.3878 with a hot Stack and TOFC. After rounding the horseshoe curve at Caliente it begins the 2% grade of the western slope of Tehachapi Mountains.