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 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

Northern Pacific steam locomotive 5136 on the turntable at Missoula, Montana, on August 20, 1949. Number 5136 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 5136 appoaching the turntable at Missoula, Montana, on August 20, 1949. Number 5136 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 5136 at Missoula, Montana, in August 1943. Number 5136 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 5135 at Missoula, Montana, in August 1943. Number 5135 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 5135 at Missoula, Montana, circa 1950. Number 5135, a class Z-8 built by Alco-Schenectady in 1943, is on the turntable at the roundhouse. Photo by Blackie Moser, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, turntable, roundhouse