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Stay up to date: SNCF Réseau is replacing the hydraulic structure at Saint-Etienne-au-Mont

Stay up to date: SNCF Réseau is replacing the hydraulic structure at Saint-Etienne-au-Mont
photo: Archive/Stay up to date: SNCF Réseau is replacing the hydraulic structure at Saint-Etienne-au-Mont
14 / 06 / 2022

At Saint-Etienne-au-Mont, on the Longueau-Boulogne-sur-Mer railway line, SNCF Réseau is replacing the hydraulic structure on rue Paul Doumer. This structure, built more than 70 years ago, is used to drain rainwater and flood water from the Liane. The work aims to replace the post-war structure with a new one, which will provide greater safety for residents and better performance for the line. The work will take place from June 13 to July 22, 2022, and will involve 55 people.


The hydraulic structure of Saint-Etienne-au-Mont, which dates from the post-war period, allows the evacuation of water in case of heavy rains and floods of the Liane. From June 13, the work will begin to replace the current structure.

To maintain passenger traffic during the day, the work will be carried out on weeknights (Mon-Wed-Thu-Fri), when the line is not in use. Only the weekend of 2-3 July requires continuous work.


From July 1 at 10 pm to July 4 at 5 am, the installation of the new structure will require 55 hours of continuous work. Once it is completed, finishing and site restoration work will take place until July 22, 2022.

The worksite is being organized in such a way as to minimize the inconvenience to residents. SNCF Réseau is working closely with the Saint-Etienne-au-Mont town hall and is distributing information to residents.


In addition to the safety of residents, the new structure will restore the line's performance for the comfort of passengers. Trains, whose speed is currently limited to 40 km/h at the current structure, will be able to run at their nominal speed of 140 km/h.


As a result of the weekend's work, passenger services will be adapted on Saturday 2 and Sunday 3 July, with TER trains between Amiens and Boulogne being interrupted and bus service being substituted.

Information for passengers is available on SNCF Connect and the TER Hauts-de-France website. The adapted timetables will be available on 17 June on

Contact TER on 0 800 099 565 (free service and call).

SNCF Réseau and its partners are committing EUR 509 million in Hauts-de-France in 2022 to modernize and maintain the regional rail network.

Find out all the latest SNCF Reseau news in Hauts-de-France on //


Source: SNCF Reseau Press Releases


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