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 Class F-1 Consolidation-type steam locomotive number 81, built by Baldwin Locomotive Works in 1888, stands coupled to two 1880s-vintage wooden passenger cars at South Tacoma, Washington, on May 4, 1940. Equipment is being switched to Northwest Railroad History Society lots after donation by the railroad. The cars were used by the group for meetings, locomotive was lost to World War II scrap drive. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger car

Northern Pacific Class Z-3 steam locomotive number 4024 leads a westbound freight train toward Stampede Tunnel at Martin, Washington, circa 1925. Photo by J.A. Turner. Other Subject Classes: steam locomotive, freight train

Northern Pacific Class Z-3 steam locomotive number 4019 clears its cylinder cocks as it starts a freight train in the yard at Auburn, Washington, circa 1928. Photo by J.A. Turner. Other Subject Classes: steam locomotive, freight yard

Northern Pacific Class Z-3 steam locomotive number 4014 awaits its next assignment at Easton, Washington, circa 1928. Photo by J.A. Turner. Other Subject Classes: steam locomotive, locomotive facility

Northern Pacific Class Z-3 steam locomotive number 4014 backs to connect to a freight train in the yard at Auburn, Washington, circa 1928. Photo by J.A. Turner. Other Subject Classes: steam locomotive,

Northern Pacific Class Z-3 steam locomotive number 4014 moves forward through the yard at Auburn, Washington, circa 1928. Photo by J.A. Turner. Other Subject Classes: steam locomotive, freight yard

Northern Pacific Class Z-3 steam locomotive number 4011 leads a westbound freight train near Martin, Washington, circa 1925. Photo by J.A. Turner. Other Subject Classes: steam locomotive, freight train

Northern Pacific Class Z-3 steam locomotive number 4006 leads an eastbound freight train toward the station at New Stampede, Washington, circa 1928. Photo by J.A. Turner. Other Subject Classes: steam locomotive, freight train

Northern Pacific Class Z-3 steam locomotive number 4006 leads an eastbound freight train toward the station at New Stampede, Washington, circa 1928. Photo by J.A. Turner. Other Subject Classes: steam locomotive, freight train