2-6-6-2 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 locomotives in the USA (data provided by Steve Llanso of Sweat House Media)

Surviving Examples of 2-6-6-2 Locomotives in the USA

No.ClassF.M. WhyteGaugeRailroad LineLocationStatusBuilder InfoNotes
122-6-6-24'-8½"SW Forest Ind Pioneer Historical Museum, 2340 N Ft Valley Rd (US 180), Flagstaff, AZdisplayBaldwin #60870, 1929
46 (110)2-6-6-24'-8½"CWR (Weyerhaeuser) Pacific Southwest Railway Museum, Campo, CAdisplayBaldwin #62064, 1937
42-6-6-2T4'-8½"Clover Valley Niles Canyon Railway, Sunol, CAoperationalBaldwin #57684, 03/1924Ran test runs in summer of 2012.
1309H-62-6-6-24'-8½"C&OWestern MD Scenic, Cumberland, MDrestorationBaldwin #74278, 1949Restoration From B&O Museum
382-6-6-24'-8½"Weyerhaeuser Modoc Northern Siding, Merrill, ORdismantledfrom fenced-in lot a mile from Great Western Railroad Museum, McCloud, CA, Fred Kepner collection
1102-6-6-2T4'-8½"Rayonier (Weyerhaeuser) Black Hills Central Railroad, Hill City, SDoperationalBaldwin, 1928
82-6-6-2T4'-8½"Rayonier Chehalis-Centralia Railroad, Chehalis, WArestorationBaldwin #58064, 1924 from Shelton, WA, sold to Roots of Motive Power, Willits, CA
1082-6-6-2T4'-8½"Weyerhaeuser Northwest Railway Museum, Snoqualmie, WAdisplayBaldwin #59087, 1926
62-6-6-24'-8½"Weyerhaeuser Northwest Railway Museum, Snoqualmie, WAdisplayBaldwin #60412, 1928
11110t2-6-6-24'-8½"US Plywood Northwest Railway Museum, Snoqualmie, WAdisplayBaldwin #59701, 1926
1308H-62-6-6-24'-8½"C&O C.P. Huntington RR Hist Soc, Huntington, WVdisplayBaldwin #74277, 1949 Placed on the National Register of Historical Places on Jan 31, 2003

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.