QCM's railroad is operating under the juridiction of Transport Quebec and is not submited to the Canadian railway operating rules.
The Cartier Railway Company, a Québec Cartier Mining subsidiary, links the mine to the port with 260 miles of track from Northeastern Québec interior to tidewater. Its southern terminal is in Port-Cartier on the North coast of the St-Lawrence river. With 20 locomotives and some 1200 cars, the railway is able to haul up to 146,000 carloads of ore year round.
QCM's mainline was constructed in 1960. In the beginning, the railroad was hauling its ore trains with EMD's GP9. A couple of ALCO's were also on the roster. Later, more ALCO's were purchased to replace the GP9's. Cartier Railway's last ALCO powered ore train finished its run at 03:30 on October 16th, 2002.
GE AC's are now leading everything except the passenger and EP brake trains.