Northern Pacific steam locomotive 5120 at Logan, Montana, circa 1950. Number 5120, a class Z-6 built by Alco-Schenectady in 1937, is making a light move. Photo by Blackie Moser, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, railroad crew

Northern Pacific steam locomotive 1594 at Logan, Montana, on August 22, 1943. Number 1594 is a class W built by Alco-Brooks in 1906. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Burlington Northern Railroad freight train 121 with full-dome passenger car, AT 540, and freight cars at Logan, Montana, on August 3, 1987. Photo by J.M. Fredrickson. Other Subject Classes: freight train, passenger car

Burlington Northern Railroad freight train 121 at between Logan and Helena, Montana, on August 3, 1987, shot from the head-end. Photo by J.M. Fredrickson. Other Subject Classes: freight train