Northern Pacific 4025, a class Z-3, on the Milwaukee mainline bridge over the Clark Fork River at Saint Regis, Montana, on May 28, 1952. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, truss bridge.

Northern Pacific steam locomotive 979 at Brainerd, Minnesota, on June 07, 1916. Number 979 is a class L built by Baldwin in 1883. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 783 with a passenger train, circa 1890. Number 783 is a class C-6 built by Portland in 1883. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 692 at Parkwater, Washington, on September 30, 1916. Number 692 is a class B-3 built by Grant in 1888. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5149 at Laurel, Montana, on May 21, 1954. Number 5149, a class Z-8 built by Alco-Schenectady in 1944, is parked near the roundhouse. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5147 at Livingston, Montana, on May 23, 1952. Number 5147, a class Z-8 built by Alco-Schenectady in 1944, passes with a freight train. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in freight train

Northern Pacific steam locomotive 5147 at Livingston, Montana, on May 23, 1952. Number 5147, a class Z-8 built by Alco-Schenectady in 1944, passes with a freight train. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in freight train

Northern Pacific steam locomotive 5146 at Laurel, Montana, on September 04, 1953. Number 5146, a class Z-8 built by Alco-Schenectady in 1944, is shown in the yard. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5144 at Missoula, Montana, in September 1953. Number 5144, a class Z-8 built by Alco-Schenectady in 1944, is parked at the engine facility. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5141 at Laurel, Montana, on May 21, 1954. Number 5141 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo