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| Name: | DM & IR - Duluth, Missabe & Iron Range Railway |
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| Herkunftsland: | USA |
| Bemerkung: | The DM&IR was born in 1937 with the merger of the Duluth Missabe & Northern and the Spirit Lake Transfer Railway. The DM&N had leased the Duluth & Iron Range since 1930 and both were owned by United States Steel. The D&IR was absorbed by the DM&IR in 1938. The DM&IR ran from the twin ports of Duluth and Superior on the Minnesota-Wisconsin border at the tip of Lake Superior, and Two Harbors, Minnesota north and northwest into the Vermilion and Missabe Ranges of northeast Minnesota. Total mileage was 357. Several of the mainlines are double track and DM&IR operated them with left-hand running. The majority of DM&IR traffic over the decades has been iron ore. Because DM&IR has traditionally had the heaviest average trains in the nation, their steam fleet had some real monsters. 2- 8-8-4 Yellowstones were the biggest. Single Yellowstones were regularly assigned to pull 18,000 ton ore trains on some of the flatter districts. Their biggest yard switchers were 0-10-0’s. DM&IR was the last of the US Steel railroads to dieselize (in 1959) so as the other roads in the US Steel family dieselized, they sent the cream of their steam fleets to the DM&IR. Mikados came from EJ&E. Bessemer & Lake Erie sent their huge Texas-type 2-10-4’s and the Union Railroad sent their 0-10-2’s. That’s not a typo, they had 0-10-2’s. They were used to replace older mallets in pusher service then ended their careers switching the ore docks. DM&IR dieselized with SD9’s (running short hood forward), SD18’s and ultimately SD38’s. They were one of a handful of Class One railroads to get through the transition era without ever buying cab unit. The SD38 has just 2000 horsepower but has nearly the same tractive effort as an SD40 at low speeds. Many roads bought them to shove trains over the crest in hump yards, but three of the US Steel railroads used them for low speed road service. By the mid-70s, DM&IR had 98 diesels. Many years later, DM&IR was one of the roads to buy rebuilt former SP Tunnel Motors. Raw iron ore was hauled in 70 ton 24’ long ore cars. The same cars with extension boards are used to haul Taconite. Taconite is low grade ore that is crushed to dust, then combined with bentonite clay and rolled into little balls. It’s less dense than raw ore, doesn’t require further grading, and resists freezing to the cars. This allows all-rail movement of taconite to the steel mills when the Great Lakes freeze over. In the 70s, DM&IR began draw-barring sets of 4 ore cars together which saved on brake hose failure and lowered the tare weigh t somewhat. They referred to these sets as ´mini-quads.” US Steel transferred B&LE and DM&IR to a subsidiary called Transtar. In 2001, the Transtar roads were sold to Great Lakes Transportation. In 2004, DM&IR and B&LE were sold to Canadian National. |
| Mögliche Abkürzungen: | DM & IR, DM & IR - Duluth, Missabe & Iron Range Railway Co. |