Colorado, Wyoming & Eastern 2-8-2 "Mikado" Locomotives in the USA

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The Laramie, Hahns Peak and Pacific Railway began in 1901. In 1914, the railway was unable to pay its mortgage so the Colorado, Wyoming and Eastern Railroad took control of the line. In April 1924 the line was sold to new owners that renamed it the Northern Colorado and Eastern Railroad Company. The citizens in Laramie requested the name of the town be in the line, so in June it was renamed again as Laramie, North Park and Western Railroad.

The line continued to struggle and the Interstate Commerce Commission urged the Union Pacific to take it over. In 1935 the UP acquired the LNP&W, and ran it until 1951 when it merged, the line becoming the Coalmont Branch of the UP, and the LNP&W depot in Laramie was closed. Shortline Wyoming Colorado Railroad bought the line in 1987, and subsequently abandoned it.

The Baldwin Locomotive Works received and order from the Colorado, Wyoming & Eastern in 1917 for the line's one and only "Mikado" type locomotive. It was delivered in 1917 and given road number 8. This locomotive had 48" diameter drivers, 20" x 28" cylinders, a 180 psi boiler pressure, it exerted 35,700 pounds of tractive effort and it weighed 187,600 pounds. The fire box was 178 square feet and the evaporative heating surface was 2,500 square feet. In 1917, Baldwin superheated the locomotive with a 536 superheater making the combined heating surface 3,036 square feet.

There are no surviving CW&E 2-8-2 "Mikado" type locomotives.


Roster by Richard Duley

Qty.Road NumbersYear BuiltBuilderNotes
181917BaldwinScrapped by 1950

Class Details by Steve Llanso of Sweat House Media

Class 8 (Locobase 6581)

Data from 1914 St J & G I diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 62, pp. 25+. Works number was 47486 in December 1917.

The LNP&W was merged with the St Joseph and Grand Island sometime in 1914, perhaps.

Baldwin took the earlier Mike design delivered in 1911 to the Laramie, Hahn's Peak & Pacific (Locobase 6580) and superheated it for delivery in 1917. (By now the LHP&P had gone into receivership and emerged as the CW&E.)

This was the result. An altered firebox disposed of the arch tubes, reducing the area. As usual the superheater contributed more than its nominal area to the engine's power. In this case, the relatively rare Southern valve gear distributed the steam through 10" (254 mm) piston valves.

Specifications by Steve Llanso of Sweat House Media
Class8
Locobase ID6581
RailroadColorado, Wyoming & Eastern
CountryUSA
Whyte2-8-2
Number in Class1
Road Numbers8
GaugeStd
Number Built1
BuilderBaldwin
Year1917
Valve GearSouthern
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.08 / 3.99
Engine Wheelbase (ft / m)28.17 / 8.59
Ratio of driving wheelbase to overall engine wheebase 0.46
Overall Wheelbase (engine & tender) (ft / m)59.12 / 18.02
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)141,300 / 64,093
Engine Weight (lbs / kg)187,600 / 85,094
Tender Loaded Weight (lbs / kg)130,000 / 58,967
Total Engine and Tender Weight (lbs / kg)317,600 / 144,061
Tender Water Capacity (gals / ML)7000 / 26.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)12 / 10.90
Minimum weight of rail (calculated) (lb/yd / kg/m)59 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)20" x 28" / 508x711
Tractive Effort (lbs / kg)35,700 / 16193.27
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.96
Heating Ability
Firebox Area (sq ft / m2)178 / 16.54
Grate Area (sq ft / m2)54 / 5.02
Evaporative Heating Surface (sq ft / m2)2500 / 232.34
Superheating Surface (sq ft / m2)536 / 49.81
Combined Heating Surface (sq ft / m2)3036 / 282.15
Evaporative Heating Surface/Cylinder Volume245.55
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation9720
Same as above plus superheater percentage11,470
Same as above but substitute firebox area for grate area37,807
Power L111,618
Power MT725.08