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The SD70MAC is no longer produced due to EPA regulations, and was replaced by the SD70ACe in 2004. In total, 1,109 SD70MACs were produced, purchased by Burlington Northern (and its successor, BNSF), Conrail, CSX, Transportación Ferroviaria Mexicana (TFM; units now owned by Kansas City Southern Railway (KCS)), and the Alaska Railroad.
BNSF Railway (reporting mark BNSF) is the largest freight railroad in the United States. One of six North American Class I railroads , BNSF has 36,000 employees, [ 1 ] 33,400 miles (53,800 km) of track in 28 states, and over 8,000 locomotives. [ 2 ]
BNSF has eliminated this practice with the construction of new facilities like the Hauser Refueling Facility in Rathdrum, Idaho. [10] The Burlington Northern traversed the most northerly routes of any railroad in the western United States. These routes started at Chicago, Illinois and ran west-northwest to La Crosse, Wisconsin.
A nickname given to EMD's SD70MAC, SD80MAC, and SD90MAC locomotive models [46] Big Orange A nickname given to BNSF, named after their orange livery Billboard Atchison, Topeka and Santa Fe Railway locomotive in the pre-1972 blue and yellow scheme [16] Black Widow A Southern Pacific locomotive (all black with some silver) [16] Bloody Nose
While the SD70ACe uses the TA17 that was used in the SD70MAC. The computer systems are largely the same, FIRE for the operator screens was used on SD70MAC's since 1997 at least. They still have the EM2000/EMDEC system. The heavy electical switch gear is largely the same on the DC units, however the layout has been changed (again)
Another broad gauge variant also came in 2012 only, that is, the EMD GT50AC, also known as the Indian locomotive class WDG-5, a smaller and lighter 135-ton variant, with an up-tweaked EMD 20N-710G3B-EC engine, capable of producing 5,500 HP (4.1MW) @ 910 RPM, to serve the Indian Railways, whose current tracks are weak to handle very heavy ...
Conrail had a different paint scheme for these locomotives and also the SD70MAC, with a large white, cone-shaped line on the front, bearing "Conrail Quality" lettering. The SD70MACs were not fitted with marker lights, [ 38 ] as they were ordered after the Conrail breakup was agreed upon, and neither NS or CSX wanted 'their' locomotives to be ...
These locomotives were built as a response to General Electric's Dash 9-44CW, where as their cousins, the SD70MAC, were built in response to General Electric's AC4400CW. By increasing the output of the 16-710-G3 engine from 4,000 to 4,300 horsepower (3,000 to 3,200 kW), the SD75 was a reality.