Northern Pacific steam locomotive 402 at Butte, Montana, circa 1902. A crew member poses on Number 402, a class D-6 built by Rogers in 1899, at the engine facility. She was formerly St. Paul & Duluth Railroad No. 65. Photo by R.C. Lean, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4019 at Yakima, Washington, on June 02, 1934. Number 4019, 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

Northern Pacific steam locomotive 4019 post-shopping break-in run at Tacoma, Washington, May 29, 1937. Number 4019 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 4019 at Brainerd, Minnesota, on May 02, 1950. Number 4019 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 4018 awaits its next train at Martin, Washington, in 1944. Number 4018 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 4018 at Easton, Washington, on September 18, 1938. Number 4018 is a class Z-3 built by Alco-Brooks in 1917. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4017 on March 14 in 1933. Number 4017 is a class Z-3 built by Alco-Brooks in 1917. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4017 at Yakima, Washington, on May 31, 1936. Number 4017, 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

Northern Pacific steam locomotive 4017 at South Tacoma, Washington, on September 17, 1938. Number 4017, a class Z-3 built by Alco-Brooks in 1917, is parked at South Tacoma. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4017 at Garrison, Montana, on September 08, 1946. Number 4017 is a class Z-3 built by Alco-Brooks in 1917. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo