Cascade Timber Company 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 107 (Locobase 15232)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 71, pp. 336+. See also "Baldwin 'Prairie' 2-6-2", Orange Empire Railway Museum website at, last accessed 4 June 2013. Works number was 55415 in May 1922.

Among the holdings of the Pacific States Lumber Company of Tacoma, Wash was the Cascade Timber Company of North Yakima. It was founded in 1902 and operated independently until 1957, when it merged with Boise-Payette to form Boise-Cascade.

A coal-burning saddle-tank logging Prairie locomotive was in the minority of such engines in the Pacific Northwest-most were oil-burners. But otherwise the superheated 107 fell right into line on moderate curves of 16 to 20 degrees and up short grades of 3% and a half-mile (0.8 km) grade of 2 1/2%. The hotter steam meant 8" (203 mm) piston valves.

The 107 operated for Cascade Timber until it was sold $16,865 in 1942 to Ventura County Railway in Oxnard, Calif as their #2. 21 years later, the 2 wsa sold to W E Standish of Port Hueneme, Calif in February 1964. Sold again in 1970 to Terry Durkin for his Orange Empire Trolley (later Railway) Museum, where it went on display in November 1973, then into tourist railroad service. The 2 was extensively overhauled from 2001-2006, then placed back in operation.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15232
RailroadCascade Timber Company
Number in Class2
Road Numbers107
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase11'
Engine Wheelbase26.58'
Ratio of driving wheelbase to overall engine wheebase 0.41
Overall Wheelbase (engine & tender)48.54'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers108000 lbs
Engine Weight137000 lbs
Tender Light Weight60000 lbs
Total Engine and Tender Weight197000 lbs
Tender Water Capacity3000 gals
Tender Fuel Capacity (oil/coal)7 tons
Minimum weight of rail (calculated)60 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter44"
Boiler Pressure180 psi
Cylinders (dia x stroke)18" x 24"
Tractive Effort27039 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.99
Heating Ability
Firebox Area150 sq. ft
Grate Area26.20 sq. ft
Evaporative Heating Surface1456 sq. ft
Superheating Surface332 sq. ft
Combined Heating Surface1788 sq. ft
Evaporative Heating Surface/Cylinder Volume205.98
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4716
Same as above plus superheater percentage5612
Same as above but substitute firebox area for grate area32130
Power L19699
Power MT593.96

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.