Compagnie de l'Ouest algérien
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The Compagnie de l'Ouest algérien (OA) was a railway company created in 1881 to build and operate a network in the Department of Oran.[1]


In 1913, the total length of the network was 449 km.
The lines are of standard gauge, except for the Blida to Djelfa line, which is of narrow gauge, built at a gauge of 1055 mm.
The Compagnie de l'Ouest algérien was integrated into the Compagnie des chemins de fer de Paris à Lyon et à la Méditerranée by decree of 31 December 1920.[2]