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.

Northern Pacific steam locomotive number 2223 leads a passenger train at St. Paul, Minnesota, circa 1935. Class Q-4 Pacific-type was built by Baldwin Locomotive Works in 1910, passes Great Northern roundhouse near St. Paul Union Station. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train, roundhouse, railroad yard

Northern Pacific steam locomotive 975 at Seattle, Washington, circa 1890. Number 975 is a class K-1 built by Baldwin in 1882. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 972, circa 1920. Number 972 is a class K-1 built by Baldwin in 1882. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 924 at South Tacoma, Washington, circa 1915. Number 924 is a class L-5 built by Rogers in 1899. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 83 at Brainerd, Minnesota, on June 14, 1916. Number 83 is a class F-3 built by Baldwin in 1888. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 75 at St. Paul, Minnesota, on July 29, 1934. Number 75, a class F-1 built by Baldwin in 1888, is in storage at St. Paul. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 700, circa 1890. Number 700 is a class C-3 built by Baldwin in 1883. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 659 at St. Paul, Minnesota, on July 29, 1934. Number 659, a class B built by Baldwin in 1887, is in storage. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 635 at Duluth, Minnesota, on July 11, 1916. Number 635 is a class C-20 built by Dickson in 1887. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo