Burlington Northern snow plow number 972503 at Dale Street facility in Minneapolis, Minnesota, on June 21, 1973. Photo by J.M. Fredrickson. Other Subject Classes: snow plow, maintenance of way.

Burlington Northern heater car number 19 at Minneapolis, Minnesota, on June 21, 1973. This unit was rebuilt from an ex-Great Northern Electro-Motive Division F unit shown at Dale Street, Minnesota. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 826, formerly Northern Pacific 7006D, at Minneapolis, Minnesota, on June 21, 1973. Number 826 is an F9A built by General Motors Electro Motive Division (EMD), builder's number 19747. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 820, formerly Northern Pacific 7005A, at Minneapolis, Minnesota, on August 24, 1972. Number 820 is an F9A built by General Motors Electro Motive Division (EMD), builder's number 19744. The locomotive is painted in an experimental simplified Northern Pacific paint scheme. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 760, formerly Northern Pacific 6006A/6051A, at Minneapolis, Minnesota, on June 21, 1973. Number 760 is an F5A built by General Motors Electro Motive Division (EMD), builder's number 6658. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 741, formerly Northern Pacific 6016B, at Minneapolis, Minnesota, on June 21, 1973. Number 741 is an F7B built by General Motors Electro Motive Division (EMD), builder's number 14270. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 733, formerly Northern Pacific 6014B, at Minneapolis Jct., Minnesota, on June 19, 1973. Number 733 is an F7B built by General Motors Electro Motive Division (EMD), builder's number 14266. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 730, formerly Northern Pacific 6013D, at Minneapolis, Minnesota in August 1972. Number 730 is an F7A built by General Motors Electro Motive Division (EMD), builder's number 14253. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, structure.

Burlington Northern diesel locomotive 730, formerly Northern Pacific 6013D, at Minneapolis, Minnesota, on August 24, 1972. Number 730 is an F7A built by General Motors Electro Motive Division (EMD), builder's number 14253. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, structure.

Burlington Northern diesel locomotive 6633 at Minneapolis, Minnesota, on June 19, 1973. Number 6633 is an F45 built by General Motors Electro Motive Division (EMD), builder's number 37173. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, roundhouse.