| Originally built as CM&StP 2-8-2 #1877 (serial #51456), it was later renumbered CMStP&P 631 in 1938. Alco-Brooks delivered the loco in July of 1912 and it lasted on the roster until retirement in August of 1951 after nearly 39 years of service. Specs - 63" drivers, 200 psi boiler pressure, 26x30" cylinders, engine weight of 277,800 lb, tractive effort of 54,723 lb. Arthur B. Johnson photo |