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1/22/2026
 
 
 
 
 
By:Gary Everhart
Dates:8/1/1904 - 8/1/1904
Album Info:Fairly nice photo of the historic first Baltimore & Ohio 0-6-6-0 Mallet type #2400 built in 1904. The date is approximate.
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BO 0-6-6-0 #2400 - Baltimore & Ohio
Title:  BO 0-6-6-0 #2400 - Baltimore & Ohio
Description:  Baltimore & Ohio 0-6-6-0 #2400 is an historic locomotive for many reasons starting with it being the first Mallet built in the US. Nicknamed "Old Maude" after a comic-strip mule, it was built to be a pusher loco for long strings of coal cars up steep grades on the B&O system. As a promotional item for the B&O, it went on display at the 1904 St Louis World's Fair. Alco-Schenectady built this unique loco in May of 1904 as B&O 0-6-6-0 #2400 (serial #27478, class O) in May of 1904 jointly designed by the B&O's James E Muhlfield and Alco's Carl J. Mellin. The success of this loco led to additional 30 revised 0-8-8-0 locos being built. In 1916, it was renumbered BO #7000. After its impact on railroading, it was still scrapped at Cumberland, MD in January of 1938. Specs - 56" drivers, impressive 235 psi boilter pressure, 20x32" high pressure cylinders, 32x32" low pressure cylinders, engine wt of 334,500 lb and tractive force of 71,500 lb. No photographer was listed for this historic photo from 1904.
Photo Date:  8/1/1904  Upload Date: 1/8/2026 6:28:22 AM
Location:  St Louis, MO
Author:  Gary Everhart
Categories:  Roster,Scenic,Steam
Locomotives:  BO 2400(Unknown)
Views:  88   Comments: 1


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