Minneapolis, Northfield & Southern #21 at the Illinois Railway Museum in 2004

MNS #21 is a DT-6-6-2000 built by Baldwin in 1948. It produces 2000 horsepower from two diesel engines. It is the only surviving DT-6-6-2000 of 42 built, of which the MNS owned five. The MNS was formed in 1918 and was absorbed in 1982 by the Soo Line, now part of Canadian Pacific.

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