by Baldwin Locomotive Works in spring 1941. As well as the Yellowstones, the DM&IR had heavy 2-8-8-2 articulated's (also Class M), 2-8-2 Mikados, 2-10-2 Santa Fe's and eventually 2-10-4 Texas types from B&LE. Ore movement was nearly in 1942 and the War Production Board allowed the Missabe to order ten more Yellowstones, delivered in 1943. The 2-8-8-4's were slowly retired in the latter half of the '50s and the last remaining served until around 1960. Dieselization and post-war growth After World War II, the DM&IR hauled increasing tonnage to the ore docks along Lake Superior, reaching a record of over 49 million tons in 1953. That year the first diesel locomotives, EMD SW9s, arrived on the railway. In 1954, a set of Baldwin DR-4-4-1500 "Sharknose" diesels arrived from the Elgin, Joliet and Eastern (a fellow U.S. Steel railroad), though they were returned to Baldwin Locomotive Works when the EJ&E contract expired in 1955. Dieselization continued with the purchase of several EMD SD9 road switchers the following year, while the last revenue steam run occurred in 1961. Passenger service on the Missabe division ended in 1957 and completely ceased system-wide in 1961. As the supply of high-quality iron ore dwindled, mines and pits were closing across Minnesota's iron ranges. The DM&IR's ore docks in Two Harbors closed in 1963 and did not reopen until 1966. The Missabe Road was saved by the passage on November 3, 1963, of the Taconite Amendment to the Minnesota State Constitution. (The amendment restricted the state's ability to tax a taconite industry for 25 years.) The passage of the amendment accelerated the creation of the taconite mining industry in Northern Minnesota. The Eveleth Taconite Company was formed in 1964 and on April 8, 1966, the took on the first load of Eveleth taconite pellets, about . The taconite era on the Missabe had begun. Ownership and CN merger In 1988, U.S. Steel, now USX, spun off the DM&IR and their other ore railroads and shipping companies into the subsidiary Transtar, then sold majority control to the Blackstone Group and USX. In 2001, the DM&IR and other holdings were spun off from Transtar into the company Great Lakes Transportation (GLT), which was fully owned by the Blackstone Group. For the first time in more than 100 years DM&IR was no longer associated with U.S. Steel. In late 2003, the Blackstone Group agreed to sell GLT to Canadian