Great Northern Railway 593 at Minot, North Dakota. The locomotive is a General Motors Electro Motive Division Model SD9. Other subject classes: Locomotive, SD-9

Great Northern Railway 593 at Minot, North Dakota. The locomotive is a General Motors Electro Motive Division Model SD9. Other subject classes: Locomotive, SD-9

Great Northern Railway 550 at Minot, North Dakota. The locomotive is a General Motors Electro Motive Division Model SD7. Other subject classes: Locomotive, SD-7

Great Northern Railway 401 at Minot, North Dakota. The locomotive is a General Motors Electro Motive Division Model SD45. Other subject classes: Locomotive, SD-45

Great Northern Railway 30 at Minot, North Dakota in 1969. The locomotive is an General Motors Electro Motive Division SW1200. Other subject classes: Locomotive, SW-9

Great Northern Railway 29 at Minot, North Dakota in 1969. The locomotive is an General Motors Electro Motive Division SW1200. Other subject classes: Locomotive, SW-9

Great Northern ground level and car bottom inspection station at Gavin Yard. Other subject categories: Yards

Great Northern interior of Gavin Yard tower at Minot, North Dakota. Other subject categories: Yards

Great Northern Gavin Yard hump at Minot, North Dakota. Other subject categories: Yards

Great Northern interior of Gavin Yard tower at Minot, North Dakota. Other subject categories: Yards