By the conclusion of the 19th century, a multitude of seaside resorts had been established along the shores of the
English Channel and the
North Sea, in response to the growing practice of sea
bathing and the expansion of summer and weekend tourism. The coastline between the estuaries of the
Authie and the
Canche rivers, situated on the southern part of the
Opal Coast, is characterized by a series of sandy beaches and vacation spots of varying importance, extending from south to north. The coastal resorts of
Berck-Plage,
Merlimont, and
Le Touquet-Paris-Plage are located in the region between the estuaries of the Authie and the Canche rivers, on the southern part of the Opal Coast. In this context, in 1891, Mr. Lambert, an entrepreneur and founder of the
Société des Dunes, sought to develop this coastal area by establishing a
railway line connecting Berck-Plage to Paris-Plage, following the coastline. The route was designed to connect with the
Aire-sur-la-Lys - Berck-Plage line in the south and the in the north, both of which were planned for implementation shortly. The request was denied, but the company was granted permission to construct a short narrow-gauge railway between Berck-Plage and the Dunes beach, to transport construction materials for real estate developments that were already underway. However, it only operated for freight transport, and no detailed information is available regarding its operations. A new request was made in the early 20th century by Paul Berger and
Charles Roy, who were responsible for establishing the
Société du Chemin de Fer de Berck-Plage à Paris-Plage (B.P.). The
declaration of public utility was signed on 27 April 1906, and work commenced. The existing line was reinforced, and the remainder of the route was opened in successive sections: • The route traversed on 7 August 1909, commenced at Berck-Plage, a shared station connecting with the
Aire-sur-la-Lys to Berck-Plage line, and concluded at Merlimont. • From Merlimont to (at the entrance to Paris-Plage), on 19 June 1910; • From Daloz to Paris-Plage (a shared station connecting with the ), on 28 July 1912. == Route and technical features ==