SP M-6 #1727 near the Botanical Gardens, Dunsmuir, CA

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SP M-6 #1727, Dunsmuir, CA

Nestled under trees on Dunsmuir Ave at the entrance to the Botanical Gardens, Southern Pacific Mogul type
(2-6-0) #1727 is a bit of a challenge to photograph.

Sixty-nine of these M-6 Class (#1725-#1769 & #1780-#1803) were built for the SP in 1901 by Burnham, Williams & Co., an early incarnation of the Baldwin Locomotive Works. Delivered as Vauclain compounds with 15½” x 28” high pressure and 26” x 28” low pressure cylinders, they were simpled in 1912 with 22” x 28” cylinders. In 1919, they were superheated, raising their weight from 174,000 lbs (150,400 lbs on their drivers) to 184,700 lbs (159,000 lbs on their drivers). Tractive effort also rose from 26,785 lbs to 33,320 lbs.

An oil burner operating at a boiler pressure of 200 psi, #1727 has a 49.5 sq ft grate, 170 sq ft firebox and total heating surface of 2,380 sq ft, including 373 sq ft superheating. It has 63” drivers, a 15’ 2” driver wheelbase, 23’ 10” engine wheelbase and Stephenson valve gear. It was retired in 1957 and donated to the City of Dunsmuir. After cleaning and repainting at the Dunsmuir roundhouse, it went on display. It has been cosmetically restored at least three times since then.

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SP M-6 #1727, DunsmuirSP M-6 #1727, Dunsmuir
SP M-6 #1727, Dunsmuir

Left, a semaphore signal has been added to the display by the Friends of the 1727, a small organisation dedicated to trying to keep #1727 restorable.

You can see two other
surviving M-6 locomotives on the SP #1765 and SP #1785 pages of this website.

SP M-6 #1727, Dunsmuir
SP M-6 #1727, DunsmuirSP M-6 #1727, DunsmuirSP M-6 #1727, Dunsmuir
SP M-6 #1727, DunsmuirSP M-6 #1727, DunsmuirSP M-6 #1727, Dunsmuir
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