Northern Pacific 5136, a class Z-8, leads a westbound extra freight out of the yard at Laurel, Montana, on August 17, 1949. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, freight yard.

Northern Pacific 5136 prepares to leave Cle Elum, Washington, with an extra freight east circa 1949. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.

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

Northern Pacific 5135, a class Z-8, hauls an eastbound fruit extra between Missoula and Drummond, Montana, in August 1943. Note the parallel Milwaukee main line in the background. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, ice refrigerator car.

Northern Pacific steam locomotive 5134 at Missoula, Montana, on August 21, 1943. Number 5134 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 5134 parked next to the water sport at Missoula, Montana, circa 1949. Number 5134 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 5134 with a freight train at Garrison in Montana, circa 1952. Number 5134 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 5134 waits for its next train at Garrison, Montana, circa 1952. Number 5134 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 5133 at Missoula, Montana, on August 20, 1949. Number 5133 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 5133 waiting for its next train at Missoula, Montana, circa 1949. Number 5133 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 5133, a class Z-8, pushes on caboose 1012 to move a freight out of the yard at Helena, Montana, in 1953. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, helper locomotive, steel caboose.

Northern Pacific steam locomotive 5132 at Missoula, Montana, in August 1943. Number 5132 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 5131 at Tacoma, Washington, on October 05, 1955. Number 5131 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 5131 at Livingston, Montana, on May 23, 1952. Number 5131 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 5131 at Garrison, Montana, in 1952. Number 5131 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5131 at Garrison, Montana, circa 1952. Number 5131 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 5130 at Missoula, Montana, on August 25, 1943. Number 5130 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 5126 at Livingston, Montana, on August 23, 1943. Number 5126 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5125 at Livingston, Montana, on June 08, 1955. Number 5125 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5125 at Livingston, Montana, on June 08, 1955. Number 5125 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5125 park in the yard at Laurel, Montana, circa 1953. Number 5125 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5125 at Helena, Montana, on May 22, 1951. Number 5125 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5124 at Livingston, Montana, on May 23, 1954. Number 5124 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific 5124, a class Z-7, hauls a westbound extra freight out of the yard at Livingston, Montana, on May 23, 1952. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, stock car.

Northern Pacific steam locomotive 5123 at Missoula, Montana, in August 1943. Number 5123 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific 5123, a class Z-7, passes the depot at Missoula, Montana, with an eastbound extra freight in August 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.

Northern Pacific steam locomotive 5123 at Livingston, Montana, on June 07, 1955. Number 5123 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5123 at Livingston, Montana, in September 1953. Number 5123 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5123 missing drive rods at Livingston, Montana, circa 1955. Number 5123 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo