This GP35 (builder #30055) was acquired new in 1965.  It was the lead locomotive in a fiery train-truck collision on a rail crossing at Mile 57 of the Anchorage-Fairbanks Highway on August 5, 1972.  Thirty-six derailed freight cars burned creating twin mile-high plumes of black smoke.  Number 2503 was wrecked again on December 2, 1976 and was rebuilt as GP35u #3051 in 1977. (Anchorage, June 1972)

 

Note: 2503 acquired a solid sill stripe after the wreck that destroyed #1830
 

Photo courtesy of Phillip Faudi