BNSF 6312 was built by EMD in March 1966 as ATSF 1713 and was renumbered
to ATSF 5013 in early 1970. It was rebuilt to SD40u in April 1981 and in
May 1998 became BNSF 6312.
SD40u BNSF 6312 was part of the 7 unit power for train 434 on Monday December 27th, 2004 passing Lynden Road. It is trailing the trains 3rd unit Dash-8 BNSF 507 and ahead of SD75I CN 5701.