The reference for locomotives and railcars


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Northern Pacific class S-10
United States | 1905 | 20 produced
The preserved No. 328
The preserved No. 328

These 20 Ten-Wheelers were built by ALCO-Rogers for the Chicago Southern Railroad between 1905 and 1907. When this company went bankrupt, 14 locomotives had not yet been delivered. Ten of these were purchased by Northern Pacific and designated class S-10. The remaining four went to other customers.

Eight of the Southern Pacific were retired between 1928 and 1933. Only 321 and 328 remained in use on branch lines. While 321 was scrapped in 1946, 328 ran for the last time in 1948. After being restored by the Minnesota Transportation Museum, it was operational from 1981 to 2001. Today it can be found at the Jackson Street Roundhouse in St. Paul, Minnesota.

Axle config4-6-0 (Ten-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length58 ft 6 in
Wheelbase29 ft 1 in
Fixed wheelbase12 ft
Total wheelbase49 ft 10 1/2 in
Service weight153,000 lbs
Adhesive weight115,000 lbs
Total weight257,000 lbs
Axle load38,333 lbs
Water capacity5,000 us gal
Fuel capacity16,000 lbs (coal)
Power sourcesteam
Estimated power950 hp (708 kW)
Optimal speed23 mph
Starting effort26,594 lbf
Power Plant
Driver diameter57 in
Boiler pressure190 psi
Expansion typesimple
Cylinderstwo, 19 x 26 in
Grate area38.5 sq ft
Firebox area145 sq ft
Tube heating area2,010 sq ft
Evaporative heating area2,155 sq ft
Total heating area2,155 sq ft
Calculated Values
steam locomotive
last changed: 03/2024

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