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

Northern Pacific steam locomotive 5140 at Missoula, Montana, on April 24, 1950. Number 5140 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5140 at Missoula, Montana, in August 1943. Number 5140 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5139 parked nex to the cinder pit at Missoula in Montana, circa 1953. Number 5139 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5137 at Missoula, Montana, in August 1943. Number 5137 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo