Northern Pacific Railroad rotary snow plow number 10 stopped after a run at Upham, Washington, on January 25, 1943. Photo by J.M. Fredrickson. Other Subject Classes: rotary snow plow, steam locomotive maintenance of way

Northern Pacific Railroad rotary snow plow number 10 clearing the westbound mainline at Martin, Washington in February, 1945. Photo by J.M. Fredrickson. Other Subject Classes: rotary snow plow, steam locomotive, maintenance of way

Northern Pacific Railroad rotary snow plow number 10 clearing the westbound mainline at Martin, Washington in February 1945. Photo by J.M. Fredrickson. Other Subject Classes: rotary snow plow, steam locomotive, maintenance of way

Northern Pacific Railroad rotary snow plow number 10 clearing the westbound mainline at Martin, Washington in February 1945. Photo by J.M. Fredrickson. Other Subject Classes: rotary snow plow, maintenance of way

Northern Pacific Railroad rotary snowplow at Easton, Washington, circa 1950. A Northern Pacific rotary snowplow clears the Easton yard near the covered turntable and cinder pit. Photo by Albert Farrow, J.M. Fredrickson Collection. Other Subject Classes: rotary snow plow, maintenance of way.

Northern Pacific Railroad rotary snow plow number 10 parked at Auburn, Washington in May 1968. Photo by J.M. Fredrickson. Other Subject Classes: rotary snow plow, maintenance of way

Northern Pacific Railroad inspection car, number B-67 on the rails at Easton, Washington, circa 1945. Photo by J.M. Fredrickson. Other Subject Classes: company equipment, motor car, track inspection.

Northern Pacific Railroad wrecker, number 17 picking up locomotive number 338 at South Bend, Washington, circa 1910. Photo from J.M. Fredrickson Collection. Other Subject Classes: company equipment, wrecking crane, steam locomotive.

Northern Pacific Railroad rotary snow plow number 10 parked at Auburn, Washington in May 1968. Photo by J.M. Fredrickson. Other Subject Classes: snow rotary plow, maintenance of way

Northern Pacific Railroad inspection car parked at the freight yard at Tacoma, Washington in 1915. Fredrickson Collection. Other Subject Classes: motor car, freight yard, track inspection