Northern Pacific steam locomotive 5112 at Pasco, Washington, in 1948. Number 5112 is a class Z-6 built by Alco-Schenectady in 1937. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5113 taking water at Pasco, Washington, on August 07, 1937. Number 5113, a class Z-6 built by Alco-Schenectady in 1937, is parked near the Pasco coal dock. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, coal dock

Northern Pacific steam locomotive 5114 building steam at Pasco, Washington, circa 1950. Number 5114 class is a Z-6 built by Alco-Schenectady in 1937. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5115 at Pasco, Washington, on August 07, 1937. Number 5115 is a class Z-6 built by Alco-Schenectady in 1937. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5119 at Pasco, Washington, on August 07, 1937. The smoke box front of Number 5119 is shown. Number 5119 is a class Z-6 built by Alco-Schenectady in 1937. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5120 at Pasco, Washington, on August 07, 1937. Number 5120, a class Z-6 built by Alco-Schenectady in 1937, is parked next to the coal dock ramp at Pasco. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, coal dock

Northern Pacific 5137, a class Z-8, leads an eastbound extra freight at Pasco, Washington, on August 05, 1953. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.

Northern Pacific steam locomotive 5138 at Pasco, Washington, on August 05, 1953. Number 5138 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 5138 at Pasco, Washington, on August 05, 1953. Number 5138 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 at Pasco, Washington, on August 05, 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