Northern Pacific Railway #3100


Wheel Arrangement: 2-6-6-2

Tank or tender type: Rectangular tender

Build date: 1910

Serial number: 34389

Driver diameter: 55 in.

Boiler pressure: 210 psi

Cylinder dimensions: 20 & 31x30 in

Grate area: 53 sq ft

Tractive effort:  58,000 lbs

Weight:  305,000 lbs

Fuel: 13 tons coal, later converted to oil

Water capacity: 8,000 gal

Service History:

1910-1940:  Northern Pacific Railway #3100. 

1940 1945:  Polson Logging Company #3100.  Railroad Camp, WA

1945 1959:  Rayonier Inc. #3100.  Railroad Camp, WA.

Disposition after logging service:



-Second sand dome added by Rayonier

-Unknown date:  Tender converted for use as a fire car.  Among other changes, the tender tank was narrowed and shortened.  It was later scrapped when Rayonier abandoned their railroad operations.


    Built for the Northern Pacific Railway, #3100 was the first locomotive of the Z-1 class 2-6-6-2s, of which six were built in 1910 (#3100-#3105).  The Z-1 class was generally similar in basic dimensions to Great Northern's L-2 class, except the Z-1s lacked the Belpaire firebox and had piston valves.  #3100 was used as a helper for NP freights traversing mountain passes in Idaho.  In the late 1930s, the Polson Logging Company of Grays Harbor, Washington was in the market for larger locomotive power for it's expanding railroad and purchased #3100 from NP in 1940.  #3100 spent the rest of her life working out of Railroad Camp on the Grays Harbor branch, both for Polson, and then Rayonier.  Retired in the late 1950s, #3100 was scrapped at Railroad Camp in 1959.  


Drawing:  #3100 with Rayonier - 1950s

Photo:  #3100 and other Polson locomotives in a 1940s publicity lineup - Warren W. Wing Collection

Photo:  #3100 at Railroad Camp in 1953 - Martin E. Hansen Collection

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