Minneapolis, St. Paul & Sault Ste. Marie Mountains

The Minneapolis, St. Paul & Sault Ste. Marie Railway received ten updated versions of the USRA light (344,500 lbs) 4-8-2 locomotives from the American Locomotive Company in 1926. They were designated as Class N-20 and given road numbers 4000 through 4009. Eight more Class N-20 "Mountains", road numbers 4010 through 4017, came from ALCO in 1928.

Three more Class N-20 "Mountains", road numbers 4018 through 4020, were built by the MStP&SSM (Soo Line) in its Shoreham Shops in Minneapolis, MN.

All twenty-one of these Class N-20 "Mountains" had 27 x 30 cylinders, 69" drivers, and a boiler pressure of 200 psi which resulted in a tractive effort of 53,900 pounds.

There are no surviving Soo Line "Mountains".

Class	Qty	Road Numbers	Locomotive Weight	Year Built	Builder
N-20	10	4000-4009	344,500 lbs	1926	ALCO
N-20	8	4010-4017	342,000 lbs	1928	ALCO
N-20	3	4018-4020	338,700 lbs	1930	Soo

Specifications for Class N-20 (Nos. 4018 - 4020)
Wheel Arrangement:	4-8-2
Length:	88' - 4.5"
Drivers:	69" dia.
Weight on Drivers:	226,900 lbs
Total Locomotive Weight:	338,700 lbs
Locomotive & Tender Weight:	549,100 lbs
Grate Area:	63 sq ft
Cylinders:	(2) 27" dia. x 30" stroke
Boiler Pressure:	200 psi
Tractive Effort:	53,900 lbs
Tender Capacity:	12,000 gals. of water and 17.5 tons of coal.

Minneapolis, St. Paul & Sault Ste. Marie Mountains

Photos

References