The line ran 10.2 kilometres (6.3 mi) in a roughly north-northwesterly direction, beginning in Montérolier-Buchy station (which is located in the commune of Montérolier and is a part of the Amiens–Rouen railway) and terminating in the small town of Saint-Saëns.

When the Amiens-Rouen railway was commissioned on April 8, 1867 by the Compagnie des chemins de fer du Nord, the town of Saint-Saëns was excluded from its route.

[1] It was a distance of some 10 kilometres (6.2 mi) to the nearest station, the Gare de Montérolier-Buchy, and a lack of local public transport made it difficult for residents of the municipality to access the railway.

[2] This lack of access affected the local economy, particularly in the manufacturing sector, with the industries of cotton spinning and leather tanning suffering from import and export of both raw materials and produce.

[4] This route, which extended 1.7 kilometres (1.1 mi) further east to meet the demands of the town council, met with the opposition of the railway company operating the Amiens-Roun line.