A Northern Pacific heavy switch engine pulls open-end gondola cars at an open-pit iron ore mine on the Lake Superior division circa 1920. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, gondola car, open pit mine.

Great Northern Railway Refrigerator car 67336, Western Fruit Express at Minneapolis, Minnesota in 1970. Other subject classes: Refrigerator car

Great Northern Railway Refrigerator car 63057, Western Fruit Express at Minneapolis, Minnesota in 1967. Other subject classes: Refrigerator car

Great Northern Railway local freight Train Number 405 with 4 F-units crossing West Channel bridge at Minneapolis, Minnesota in 1967. Other subject classes: Bridge,

Great Northern Railway 186 at Waconia, Minnesota in 1968. General Motors Electro Motive Division NW-5 number 186 on local train near Waconia, Minnesota. Other subject classes: RS-2, Locomotive

Great Northern covered sand hopper 973004, at Saint Paul, Minnesota, April 26, 1981. Photo by John Riddell from the Bill Grandin Collection.

Burlington Northern westbound intermodal train Number 23 crossing the Stone Arch Bridge over the Mississippi River at Saint Anthony Falls in Minniapolis, Minnesota on October 14, 1980. Photo by AL Christianson

Burlington Northern Train Number 560 leaving westbound at Willmar, Minnesota on July 26, 1971. Photo by Howard Patrick.

Burlington Northern eastbound local train near Willmar, Minnesota on July 25, 1972. Photo by Howard Patrick.

Burlington Northern Type U25C Number 5627, former Northern Pacific Number 2527; U25C Number 5637, former Burlington Number 557; U28C Number 5673, former Northern Pacific Number 2807; passing Hoffman Avenue interlocking in Daytons Bluff, Minnesota with two Great Northern ballast hoppers, including Number 78264, on April 15, 1980. Photo by Al Christianson.

Burlington Northern F9A Number 774, F9B Number 833; F9A Number 784, F9A Number 790, all former Northern Pacific; in Minneapolis, Minnesota on August 14, 1980. Photo by Al Christianson.

Burlington Northern Class SD40-2 Number 6708, built February 1976; SD40-2 Number 6754, built December 1976; and SD40-2 Number 6726, built February 1976; at Newport, Minnesota with eastbound loaded ore jennies, including Northern Pacific hopper Number 78455, Great Northern hopper Number 92*83, and Great Northern hopper Number 91867, on May 30, 1980. Photo by Al Christianson.

Burlington Northern Class SD40-2 Number 6708, built February 1976; SD40-2 Number 6754, built December 1976; SD40-2 Number 6726, built February 1976; at Newport, Minnesota with eastbound loaded ore jennies on May 30, 1980. Photo by Al Christianson.

Burlington Northern Class SD9 Number 6108 and SD7 Number 6016 with freight cars at Minneapolis, Minnesota on February 9, 1982. Photo by Al Christianson. Number 6108 was built by Electro-Motive Division in May, 1956 as Great Northern Number 581, Builder Number 21249. Number 6016 was built by Electro-Motive Division in May 53 as Great Northern Number 566, Builder Number 17897. It was retired in September, 1983.

Burlington Northern Class SD9 Number 6108 and SD7 Number 6016 passing under a signal bridge with freight cars at Minneapolis, Minnesota on February 9, 1982. Photo by Al Christianson. Number 6108 was built by Electro-Motive Division in May, 1956 as Great Northern Number 581, Builder Number 21249. Number 6016 was built by Electro-Motive Division in May 53 as Great Northern Number 566, Builder Number 17897. It was retired in September, 1983.

Burlington Northern Class U28B Number 5450, GP40 Number 3003 and GP30 Number 2242 with a manifest at Daytons Bluff in Saint Paul, Minnesota on April 14, 1981. Photo by Al Christianson. Number 5450 was built by General Electric in October 66 as Chicago, Burlington and Quincy Railroad Number 106:2, Builder Number 36101. It was retired in August, 1986. Number 3003 was built by Electro-Motive Division in December 66 as Chicago, Burlington and Quincy Railroad Number 173, Builder Number 32569. It was retired in August, 1986. Number 2242 was built by Electro-Motive Division in June 62 as Chicago, Burlington and Quincy Railroad Number, 19965, Builder Number 27176. Rebuilt as GP39E 2758 in August, 1989.

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 SD7 Number 6022 and an unidentified Burlington Northern Class SD7 with a manifest at Daytons Bluff, Minnesota on January 3, 1982. 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 diesel locomotive 5481 leading a train at Dayton's Bluff in Saint Paul, Minnesota on June 8, 1974. Number 5481 is a U30B built by General Electric (GE), builder's number 36521. Photo by Howard Patrick.

Burlington Northern caboose 10365 brings up the rear of an eastbound, 56-car frieght train at Raymond, Minnesota on June 23, 1974.