The Chemin de fer Arnaud (reporting mark ARMD) (in English, the Arnaud Railway) is a Canadian short line railway operating in the province of Quebec.
Opened in 1965, the railway operates a line running around Sept-Îles Harbour from Arnaud Junction, on the Quebec North Shore and Labrador Railway to ship loading facilities at Pointe-Noire.
The railway is owned by the Wabush Mining Company, which mines iron ore in Wabush, NL. The ore is transported from the mine to a connection with QNSL at Wabush, NL by Arnaud's sister railway, the Wabush Lake Railway. QNSL transports the ore between Wabush, NL and Arnaud Jct., QC. At Arnaud Jct., the ore is transferred to Chemin de fer Arnaud for the final journey to Pointe-Noire, QC.
Formerly Cleveland Cliffs, Cliffs owns appx. 25percent of railway.
Currently, this railway (along with the Tshiuetin Rail Transportation line, QNSL, and Wabush Lake Railway) form an isolated railroad network, as it does not interchange with any other rail lines on the North American network at this time.