DM&IR began with the discovery of iron ore in N.E. Minnesota in the 1880's, assuming it's present name in 1937. DM&IR hauls millions of tons of taconite pellets annually over its 212 miles of track from the Missabe Range to Duluth and Two Harbors, MN.
The DM&IR was owned for many years by Great Lakes Transportation, owner of 2 other RR's and 8 ore boats. In May 2004 Canadian National purchased Great Lakes Transportation.  CN officially retired the DM&IR name at the end of 2011.

DMIR 212 at Kelsey, MN, 9/27/02

DMIR 221 at Proctor, MN, 7/25/01