0-4-2 Steam Locomotives in Mexico

Hacienda Pardo


Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 12622)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 25, p. 33. Works number was 20968 in October 1902

The broker for this skinny-gauge saddle tank was Valentin Elcoro & Co. for Don Manuel Hernandez Acevedo.

Locobase know little about Hacienda Pardo, but he found a Facebook post that he can't resist posting about a "forgotten bridge" posted 19 July 2026 on the Que Bonito San Luis in Villa de Reyes, SLP [San Luis Potosí] thread ([]):

As Google translated his remarks, note the role Hernancez Acevedo's Hacienda Pardo played in building this railway bridge::

"You likely aren't familiar with this architectural treasure, which sits in silence as the world forgets it.

The La Asunción Bridge is a masterpiece by Antonio Prieto, completed in 1904; until 1920, it served as a crucial link in the [27 mile; 43.5 km] Villa de Reyes railway line between Jesús María and Ojo Caliente. Built using cement, masonry, and compressed bricks from the Hacienda de Pardo, it boasts impressive dimensions: a 70-meter embankment, a height of 13 meters, and a width of 1.80 meters.

Seems likely that this tiny engine crossed this bridge from time to time.

He added: "We combined a motorcycle ride with hiking to visit the site and took the opportunity to explore the area further-staying out until nightfall. Along the way, we encountered a chapel, other ruined buildings, and a wide variety of wildlife-mostly venomous species. Yet, the sad reality we cannot ignore is that this living testament to the engineers and artisans who tamed the desert is dying in silence, left in perpetual solitude"

Principal Dimensions by Steve Llanso of Middle Run Media
Class1
Locobase ID12622
RailroadHacienda Pardo
CountryMexico
Whyte0-4-2ST
Number in Class1
Road Numbers1
Gauge60 cm
Number Built1
BuilderBurnham, Williams & Co
Year1902
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 3.67 / 1.12
Engine Wheelbase (ft / m) 8.50 / 2.59
Ratio of driving wheelbase to overall engine wheelbase 0.43
Overall Wheelbase (engine & tender) (ft / m) 8.50 / 2.59
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)10,500 / 4763
Engine Weight (lbs / kg)15,500 / 7031
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)150 / 0.57
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)9 / 4.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)24 / 610
Boiler Pressure (psi / kPa)150 / 1030
High Pressure Cylinders (dia x stroke) (in / mm)7" x 12" / 178x305
Tractive Effort (lbs / kg)3124 / 1417.02
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.36
Heating Ability
Tubes (number - dia) (in / mm)46 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 6.26 / 1.91
Firebox Area (sq ft / m2)19.50 / 1.81
Grate Area (sq ft / m2) 4.53 / 0.42
Evaporative Heating Surface (sq ft / m2)132 / 12.27
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)132 / 12.27
Evaporative Heating Surface/Cylinder Volume249.06
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation680
Same as above plus superheater percentage680
Same as above but substitute firebox area for grate area2925
Power L12598
Power MT1090.97

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