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2020 gas & renewable gas
Gas in Focus - publication of the 2020 edition
Campagne de communication pour soutenir le développement des gaz renouvelables en France
CONNECT - The educational experience around the gas networks of today and tomorrow

Construction companies

About the existing network

Works next to the pipeline: more about the process and regulation

Whether you establish a work site as an individual company or as a sub-contractor, you are legally obliged to check the single service point prior to works commencing.

This government platform allows you to find out the locations of existing networks and complete any declaration procedures.


How do you make a declaration on the single service point?

  • After having identified yourself on the platform, you must outline the location of your proposed work site on an IGN underground map.
  • The site will then list the network operators affected by your project and gives you access to pre-filled DICT forms. You must send a DICT to each network operator affected by your proposed works, as well as a map showing the extent of the impact with its georeferenced details.
    If you are also the contracting agent, you can fill in a joint DT/DICT works declaration.
    These can be sent by post or email.
  • GRTgaz, as all other network operators, in principle has 9 days to get back to you. This deadline can be extended to 14 days when the DICT is sent by post.
    Responses from GRTgaz will contain maps detailing the locations of sections of their network and technical recommendations for carrying out your work in the safest way possible.

If there is no response from GRTgaz, send us your DICT again by registered post. Our high-pressure natural gas pipelines can pose a serious risk if they are damaged.
Do not under any circumstances start your work without receiving a reply from us.

You can perform these steps on the online site Protys.


What should I do if the work needs to be carried out urgently?

Some work that is justified for reasons of safety, avoiding interruptions in public service, safeguarding people or property and force majeure may be carried out as an emergency.

The contractor must then consult the single service point www.reseaux-et-canalisations.gouv.fr to to know the emergency numbers for the network operators most likely to have safety implications and contact these numbers before beginning work on site. In the event that the GRTgaz network passes nearby, you must not carry out any work without authorisation from the GRTgaz representative.

Treatment center DT/DICT : informations and useful numbers

  • Territoire Val de Seine
    >> Best practices leaflet
    01 40 85 20 77
    0800 00 11 12 (uniquement pour prévenir en cas d’incident sur le réseau)
    2 Rue Pierre TIMBAUD
  • Territoire Nord Est
    >> Best practices leaflet
    03 21 64 79 29
    0800 30 72 24 (uniquement pour prévenir en cas d’incident sur le réseau)
    2 Boulevard de la République ZI B
    62232 ANNEZIN
  • Territoire Rhône Méditerranée
    >> Best practices leaflet
    04 78 65 59 59
    0800 24 61 02 (uniquement pour prévenir en cas d’incident sur le réseau)
    33 Rue Petrequin - BP 6407
    69413 LYON CEDEX 06
  • Territoire Centre Atlantique
    >> Best practices leaflet
    0800 02 29 81 (uniquement pour prévenir en cas d’incident sur le réseau)
    10 Quai Emile Cormerais - CS 10002
    02 40 38 86 29

    Rabion - 62 Rue de la Brigade RAC
    05 45 24 24 29