Eel River & Eureka 4-4-0 "American" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Iaqua (Locobase 11819)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 11, p. 255 Works numbers were 7013 in November 1883 and 7400 in August 1884

The ER & E operated in northern California, running up the canyons carved by its namesake river as that stream headed northwest toward Humboldt Bay. It was a lightly built road for the standard gauge and required these small Eight-wheelers (and a Mogul) to run on it.

The ER & E remained independent for almost 20 years before being merged with two other railroads into the San Francisco & Northwestern in 1903. The SF & NW in turn was merged into the Northwestern Pacific in 1907. The two 4-4-0s continued in service until they were srcrapped in July 1920 and December 1916, respectively.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID11819
RailroadEel River & Eureka
Number in Class2
Road Numbers1-2
Number Built2
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.50 / 1.98
Engine Wheelbase (ft / m)19.08 / 5.82
Ratio of driving wheelbase to overall engine wheelbase 0.34
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)30,000 / 13,608
Engine Weight (lbs / kg)46,000 / 20,865
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1400 / 5.30
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)25 / 12.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)12" x 22" / 305x559
Tractive Effort (lbs / kg)7293 / 3308.05
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.11
Heating Ability
Tubes (number - dia) (in / mm)94 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.37 / 2.86
Firebox Area (sq ft / m2)63.40 / 5.89
Grate Area (sq ft / m2)12.10 / 1.12
Evaporative Heating Surface (sq ft / m2)521 / 48.42
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)521 / 48.42
Evaporative Heating Surface/Cylinder Volume180.90
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1573
Same as above plus superheater percentage1573
Same as above but substitute firebox area for grate area8242
Power L13026
Power MT444.75

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Wes Barris