2-6-6-2 "Mallet Mogul" Locomotives in the USA

The first Mallet was an 0-6-6-0. Around 1905 the Great Northern Railroad was interested in one but wanted a locomotive that was better suited to main line operation. Baldwin built five "0-6-6-0"s with leading and trailing two-wheel trucks. This configuration suited the GN's curving main line of the Cascades.

It wasn't until 1910 that 2-6-6-2s were built with their firebox behind the drivers and supported by the trailing truck which is normally why one would have a trailing truck. Subsequent 2-6-6-2s were built following this design.

The 2-6-6-2 was primarily a low-speed locomotive. This wheel arrangement was also commonly used on the logging railroads in the Western USA. However, the C&O (Chesapeake & Ohio) continued developing the 2-6-6-2. Their versions evolved into very large road locomotives. With their smokebox-mounted air pumps, they looked quite impressive. Fortunately, two of these class H-6 C&O locomotives survive today.

This wheel arrangement was also used by the Southern Pacific in their development of the Cab Forward locomotive. On the SP this wheel arrangement was called a "Mallet Mogul".


Railroads that used 2-6-6-2 "Mallet Mogul" Locomotives in the USA (data provided by Steve Llanso of Sweat House Media)

Surviving Examples of 2-6-6-2 "Mallet Mogul" Locomotives in the USA

No.ClassF.M. WhyteGaugeRailroad LineLocationStatusBuilder InfoNotes
46 (110)2-6-6-24'-8½"CWR (Weyerhaeuser) Pacific Southwest Railway Museum, Campo, CAdisplayBaldwin #62064, 1937 Appeared in There Goes A Train.
122-6-6-24'-8½"SW Forest Ind Pioneer Historical Museum, 2340 N Ft Valley Rd (US 180), Flagstaff, AZdisplayBaldwin #60870, 1929
1102-6-6-2T4'-8½"Rayonier (Weyerhaeuser) Black Hills Central Railroad, Hill City, SDoperationalBaldwin #60561, 1928
1082-6-6-2T4'-8½"Weyerhaeuser Black Hills Central Railroad, Hill City, SDoperationalBaldwin #59087, 1926Restoration From Snoqualmie, WA.
1308H-62-6-6-24'-8½"C&O C.P. Huntington RR Hist Soc, Huntington, WVdisplayBaldwin #74277, 1949 One of only two surviving C&O 2-6-6-2s, the other one being C&O (WMSR) 1309. Placed on the National Register of Historical Places on January 31, 2003.
382-6-6-24'-8½"Weyerhaeuser Modoc Northern Siding, Merrill, ORdismantledOperated by Rayonier INC. until 1968, making her the last Baldwin logging mallet to be retired from commercial use. From a lot a mile from Great Western Railroad Museum, McCloud, CA, Fred Kepner collection. Being kept by the Oregon Coast Scenic.
1309H-62-6-6-24'-8½"WM (C&O) Western MD Scenic Shops, Ridgeley, WVout of serviceBaldwin #74278, 1949Restoration Named Maryland Thunder. From the B&O Railroad Museum. Last steam locomotive built by Baldwin. Test fired and moved under its own power on December 31, 2020. Debuted in excursion service on December 17, 2021. Taken out of service in December 2023.
62-6-6-24'-8½"Weyerhaeuser Northwest Railway Museum, Snoqualmie, WAdisplayBaldwin #60412, 1928Operated from 1969 to 1974.
11110 ton2-6-6-24'-8½"US Plywood Northwest Railway Museum, Snoqualmie, WAdisplayBaldwin #59701, 1926 Operated from 1974 to 1990.
42-6-6-2T4'-8½"Clover Valley Niles Canyon Railway, Sunol, CAoperationalBaldwin #57684, 03/1924Ran test runs in the summer of 2012.
82-6-6-2T4'-8½"Rayonier Roots of Motive Power, Willits, CArestorationBaldwin #58064, 1924 From Shelton, then Chehalis, WA.
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