The Duluth, Missabe and Iron Range Railway (DM&IR) is a railroad operating in northern Minnesota

Minnesota

Minnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...

 and Wisconsin

Wisconsin

Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...

 that hauls iron ore and later taconite

Taconite

Taconite is a variety of iron formation, an iron-bearing sedimentary rock, in which the iron minerals are interlayered with quartz, chert, or carbonate...

 to the Great Lakes

Great Lakes

The Great Lakes are a collection of freshwater lakes located in northeastern North America, on the Canada – United States border. Consisting of Lakes Superior, Michigan, Huron, Erie, and Ontario, they form the largest group of freshwater lakes on Earth by total surface, coming in second by volume...

 ports of Duluth

Duluth, Minnesota

Duluth is a port city in the U.S. state of Minnesota and is the county seat of Saint Louis County. The fourth largest city in Minnesota, Duluth had a total population of 86,265 in the 2010 census. Duluth is also the second largest city that is located on Lake Superior after Thunder Bay, Ontario,...

 and Two Harbors, Minnesota

Two Harbors, Minnesota

As of the census of 2000, there were 3,613 people, 1,636 households, and 953 families residing in the city. The population density was 1,120.7 people per square mile . There were 1,631 housing units at an average density of 505.9 per square mile...

. Control of the railway was acquired on May 10, 2004 by the Canadian National Railway

Canadian National Railway

The Canadian National Railway Company is a Canadian Class I railway headquartered in Montreal, Quebec. CN's slogan is "North America's Railroad"....

 (CN) when it purchased the assets of Great Lakes Transportation

Great Lakes Transportation

Great Lakes Transportation LLC is a group of transportation related companies primarily consisting of rail and water carriers catering to the needs of the steel making industry centered around the Great Lakes of North America...

.
The DM&IR was formed by the 1937 merger of the Duluth, Missabe and Northern Railway (DM&N) and the Spirit Lake Transfer Railway; the Duluth and Iron Range Rail Road (D&IR) and Interstate Transfer Railway were added in 1938.