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 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 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 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 GP40 Number 3029, former Burlington Number 629; Southern Pacific U33C Number unknown; Union Pacific SD40-2 Number unknown; Union Pacific SD40-2 Number unknown; in Saint Paul, Minnesota with detour piggyback freight on February 16, 1980. Photo by Al Christianson.

Burlington Northern GP10 Number 1408, former Great Northern Number 608; passing Hoffman Avenue interlocking in Daytons Bluff, Minnesota pulling Soo Line covered hoppers on April 14, 1981. Photo by Al Christianson.

A Northern Pacific steam locomotive at Stampede, Washington, as seen from the Borup Loop, circa 1925. A doubleheaded passenger train makes its way over Stampede Pass. Photo by J.A. Turner. Other Subject Classes: steam locomotive, passenger train