Northern Pacific 4011 waits in the siding at Thrall, Washington, with an extra freight west circa 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.

Northern Pacific steam locomotive 4011, circa 1919. Number 4011 is a class Z-3 built by Alco-Schenectady in 1913. J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4011, circa 1919. Number 4011 is a class Z-3 built by Alco-Schenectady in 1913. J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4012 takes water at Easton, Washington, on April 08, 1943. Number 4012 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 4012 waits for its next train at Leater, Washington, circa 1919. Number 4012 is a class Z-3 built by Alco-Schenectady in 1913. J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4012 parked in front of the Boiler Shop at South Tacoma, Washington, circa 1938. Number 4012, a class Z-3 built by Alco-Schenectady in 1913, is parked in front of the South Tacoma Boiler shop. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, shop building

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

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 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 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