From 1912 through 1924 the AT&SF continued to add 2-10-2s to its
roster and all were built by either Baldwin or its own shop forces. Its
most powerful designs were some of the last it acquired that could
produce tractive efforts of 85,000+ pounds, a weight exceeding 350 tons
(including tender), and a firebox that was more than 400 square feet in
size (among other features). The railroad's earlier units began to see
retirement in the late 1930s although its more powerful Santa Fes
remained in service until virtually all steam left the property in the
mid-1950s. Today, only one of its original 352 examples is preserved; Class 900 #940 is on display at the Bartlesville depot in Bartlesville, Oklahoma.
Aside from the AT&SF more than 50 other lines or their subsidiaries rostered Santa Fe types; of these the B&O, Burlington, Erie, Lehigh Valley, Pennsylvania, Southern Pacific, Southern, and Union Pacific featured a fleet that neared or exceeded 100 units. Interestingly, however, between the time the AT&SF took delivery of its first two classes of 2-10-2s few were built for nearly a decade when a major construction boom on the locomotive occurred. As mentioned above the B&O's 2-10-2s were one of the more successful, as the railroad was quite pleased with their performance that spanned nearly four decades. Needing a more powerful locomotive to lug heavy freights over Sand Patch and other stiff grades through the Alleghenies in 1914 the B&O took delivery of a single example, #6000 that was listed as Class S.
The railroad went on to roster 31 units in this class, #6000-6030, and then acquired 125 additional examples listed as Class S-1 and S-1a numbered 6100-6224. Despite the inherent issues with the Santa Fe type that drove away many lines from either operating them or owning very many (notably high maintenance costs) the B&O found its "Big Sixes" ideal in drag service applications where they would normally not be operating above 30 mph. Due to the imbalancing (which not only caused wear on the locomotive but also the track) that forced the 2-10-2 to only be useful in low-speed, drag service and by the 1920s many railroads, which had purchased it, began to dislike the design in favor of the 2-8-2 Mikado.
Still, many were built (around 2,200) and the United States Railroad
Administration, during takeover of the nation’s railroads during World
War I, used many light and heavy versions of the Santa Fe Type. In any
event, by the early 1930s the final 2-10-2s were outshopped although
some did survive in daily service until the early 1960s. Today, about a
half-dozen American-built 2-10-2s remain preserved although none are
operational (there are also two Canadian National units on display in
that country). Also of note, while not technically Santa Fe types since
they did not originate from this country, two operating 2-10-2s of the
QJ Class from China (for use in tourist service) can be found in Rock
Island, Illinois owned by the Railroad Development Corporation (Iowa
Interstate). Additionally, RJ Corman operates a QJ as well, #2008.
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2-10-2, Santa Fe