Northern Pacific steam locomotive 4017 at Auburn, Washington, on May 12, 1934. Number 4017, a class Z-3 built by Alco-Brooks in 1917, is parked at the Auburn coal dock. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, coal dock

Northern Pacific steam locomotive 4017 at Tacoma, Washington, fresh out of the South Tacoma shops on August 29, 1934. Number 4017 is a class Z-3 built by Alco-Brooks in 1917 J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4016 at Tacoma, Washington, on February 29, 1944. Number 4016 is a class Z-3 built by Alco-Brooks in 1917. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific 4016 on a local freight at Lester, Washington, circa 1949. Photo by Vormsberg, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, freight train.

Northern Pacific 4016 on a local freight at Lester, Washington, circa 1949. Photo by Vormsberg, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, freight train.

Northern Pacific 4016 and two sister Class Z-3s wait for their next assignment at Easton, Washington, in 1944. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, locomotive facility.

Northern Pacific steam locomotive 4016 at Easton, Washington, in 1944. Number 4016 is a class Z-3 built by Alco-Brooks in 1917. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4016 at Easton, Washington, on September 08, 1943. Number 4016 is a class Z-3 built by Alco-Brooks in 1917. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4015 at Yakima, Washington, on June 27, 1937. Number 4015, a class Z-3 built by Alco-Brooks in 1917, is parked next to the Yakima roundhouse. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roundhouse

Westbound Class Z-3, Northern Pacific 4015, passes the depot at Wymer, Washington, on June 14, 1944. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.