Northern Pacific steam locomotive 4021 at Garrison, Montana, on September 08, 1946. Number 4021 is a class Z-3 built by Alco-Brooks in 1920. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

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

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

Helper Northern Pacific 4016 leads Northern Pacific 6003 out of tunnel number 4 and past the New Stampede, Washington, station on February 11, 1945. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, diesel locomotive, telegraph station.

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 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 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, 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.

Northern Pacific steam locomotive 4015 at Martin, Washington, in July 1944. Number 4015 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 4015 waits at Martin, Washington, for its turn to travel through the Stampede Tunnel number 3 in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.

Northern Pacific steam locomotive 4014, circa 1938. Number 4014 is a class Z-3 built by Alco-Schenectady in 1913. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Two class Z-3 helpers, including number 4014, sandwich a wood caboose on the rear of an extra freight west at Easton, Washington, in 1943. This is the normal "one-in, one-on" helper configuration referring to one helper in the train and one on the rear of the train used on Stampede Pass. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, wood caboose.

Northern Pacific steam locomotive 4013 running light to Auburn at Tacoma, Washington, on March 19, 1936. Number 4013 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4013 fresh out of the shops at South Tacoma, Washington, circa 1936. Number 4013 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4013 cupled to another Z-3 locomotive at Lester, Washington, circa 1915. Number 4013 is a class Z-3 built by Alco-Schenectady in 1913. Photo by L.B. Waters, J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4013 at Easton, Washington, in 1944. Number 4013 is a class Z-3 built by Alco-Schenectady in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo