Burlington Northern Type U33C Number 5704, former Great Northern Number 2534; leads two unidentified General Electric engines and a westbound freight at Wishram, Washington in 1974. Burlington Northern GP30 in background. Photo by Keith Ardinger.

Burlington Northern Class SD7 Number 6022 with an unidentified business car at Minneapolis, Minnesota on August 14, 1980. Photo by Al Christianson. Number 6022 was built by Electro-Motive Division in April, 1953 as Great Northern Number 572, Builder Number 17903. It was retired in July, 1983. Other subject categories: Business Cars

Burlington Northern Class SD7 Number 6022 with freight cars at Saint Paul, Minnesota on April 7, 1981. Photo by Al Christianson. Number 6022 was built by Electro-Motive Division in April, 1953 as Great Northern Number 572, Builder Number 17903. It was retired in July, 1983.

Burlington Northern Class SD24 Number 6252, (former Burlington Number 512); a leased Precision SD18m Number 1809; and a leased Precision SD18m Number 184* at Dayton's Bluff, Minnesota with Conrail covered gondola in 1979. Photo by Al Christianson.

Burlington Northern Class SD40 Number 6342, (former Colorado and Southern Number 882); a U33C, number unknown, (former Chicago, Burlington and Quincy, number unknown); and an SD40-2, number unknown; passing Coon Creek train order office at Minneapolis, Minnesota with a westbound freight on February 7, 1981. Photo by Al Christianson.

Burlington Northern Class SD45 Number 6537, built August 1971; SD45 Number 657*, (former Colorado and Southern), built October 1971; and an unknown engine; with a freight at an unidentified location on September 19, 1980. Photo by Al Christianson.

Burlington Northern Class F45 Number 6613, (former Great Northern Number 440); at Northtown, Minnesota on February 24, 1981. Maintenance base "Havre". Photo by Al Christianson.

Burlington Northern Class F45 Number 6615, built July 1970; an SD40-2, number unknown; an SD45, number unknown; and an SDP45, number unknown; at an unidentified location on March 22, 1981. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6729, built March 1976; two SD40-2 numbers unknown; moving under the 7th Street overpass in Saint Paul, Minnesota with westbound empty coal hoppers on October 5, 1980. Photo by Al Christianson.

Burlington Northern SD40-2 Number 6729, built March 1976; two SD40-2 numbers unknown; at Saint Paul, Minnesota with westbound empty coal hoppers on October 5, 1980. Photo by Al Christianson.