Brookhaven & Pearl River 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 12772)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 27, p. 233. See also "Engage in Huge Reforestry Plan--Perpetual Timber Supply Until Eternity at Great Southern Co.'s Tract at Bogalusa - A Local Reforestation Project", McKean County Democrat (12 February 1925), as archived at [], last accessed 15 December 2016'; and a series of short biographies on lumber companies and reforestation programs at, last accessed 15 December 2016. Works numbers were 25739 in May 1905 and 26055 in July.

Included in the order for the three East Louisiana logging Prairies described in Locobase 12771 were two other identical engines for the Pearl River area. The 10-mile B&PR opened in 1904; these were the only rod-driven locomotives built new for the line.

When Illinois Central bought the B & PR in 1910, it sold both engines to the Great Southern Lumber Company in 1910. The EL/NOGN engines would join the GSLC in 1916.

Although operating primarily in Louisiana, this firm was headquartered in Buffalo, NY. [See Courtenay de Kalb, "Perpetual Timber Supply Through Reforestation as Basis For Industrial Permanency", Timberman (July 1921), pp. 32A-32H, archived online at [], last accessed 25 June 2011. Describes founding of Bogalusa as well as then-new idea of managed timber harvesting.]

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,772
RailroadBrookhaven & Pearl River
Number in Class2
Road Numbers7-8
Number Built2
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.33 / 2.54
Engine Wheelbase (ft / m)23.83 / 7.26
Ratio of driving wheelbase to overall engine wheebase 0.35
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)84,000 / 38,102
Engine Weight (lbs / kg)110,000 / 49,895
Tender Loaded Weight (lbs / kg)80,000 / 36,287
Total Engine and Tender Weight (lbs / kg)190,000 / 86,182
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)47 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)45 / 1143
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)26,203 / 11885.50
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.21
Heating Ability
Firebox Area (sq ft / m2)116 / 10.78
Grate Area (sq ft / m2)16 / 1.49
Evaporative Heating Surface (sq ft / m2)1556 / 144.61
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1556 / 144.61
Evaporative Heating Surface/Cylinder Volume246.79
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3200
Same as above plus superheater percentage3200
Same as above but substitute firebox area for grate area23,200
Power L15082
Power MT400.14

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Wes Barris