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La revue soGaz #5

Safety policy

All work sites must be run in respect of the legislation currently in force.

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


Construction work close to our pipelines is dangerous without prior notification

Our high-pressure natural gas network is the longest in Europe, with over 32,000 km of pipes, buried to depths of one metre, stretching across most of France.

Damaging a high-pressure gas pipeline can have serious consequences: interruptions to the local gas supply in the best case scenario, or material damage to property or personal injuries in the most severe cases.

All work sites must be run in respect of the legislation currently in force. Before starting any building work, it is your responsibility to find out whether there are any pipelines in the proximity of your designated work site.
This information is available from all town halls and, since 1st July 2012, online via a single service point: www.reseaux-et-canalisations.gouv.fr. On this site you will also be able to identify any network operators that may be affected by your work, and download forms for Declarations of Proposed Works (DTs) and Declarations of Intent to Carry out Works (DICTs).


Safety is everybody's responsibility

Carrying out building work safely requires everyone involved to work together:

  • GRTgaz, through the design, construction, operation and monitoring of their gas transmission facilities;
  • Contracting agents and project managers, by ensuring regulatory obligations are met;
  • Companies carrying out the work, by respecting their regulatory obligations and the recommendations provided by the transmission network operator;
  • Individuals on the work site, by conveying any necessary information to the relevant people.

New regulations will reinforce everyone's roles and responsibilities

New damage prevention regulations, which has come into force on 1st July 2012, set out the obligations that everybody shares to prevent the occurrence of accidents.

In particular, it targets:

  • Project managers (MOA):
    • Anybody (individual, company, local authority or council) that intends to carry out, or is the process of carrying out, excavation works;
    • Any infrastructure users (water, electricity, sanitation, gas, etc.).
  • Any work agents who are physically completing the work on behalf of the project managers.

This new regulation reinforces the declarations that must be made prior to the establishment of a work site:

  • The Declaration of Proposed Works (DT) is completed by anyone who is planning on undertaking works.
  • The Declaration of Intent to Carry out Works (DICT) is completed after the DT, using a single DT-DICT form, by anyone who intends to start carrying out works.
  • All the recipients of Declarations of Proposed Works (DT) and Declarations of Intent to Carry out Works (DICT) are legally obliged to respond to the declarer with a receipt. The theoretical deadline for a reply is within nine days for an electronic DT or fifteen days for DT transmitted by traditional methods. The deadline may be extended by fifteen days in the event of a visit to the site by the network operators. The response time for a DICT is nine days.


Every year, GRTgaz receives more than 500,000 work declarations.
Around 58,000 of these involve our network.

As we transport natural gas at high pressures, our network is labelled as a sensitive network, and we are therefore required to respond to third party requests as quickly as possible.

As of 1st July 2012, we will be legally obliged to make at least one visit to any site that is the subject of a declaration of intent to carry out works (DICT).

Every year, thanks to close scrutiny of our network, we discover around 1,000 undeclared construction projects. This scrutiny is part of our policy on maintaining and monitoring our network (on foot, by car, by helicopter, etc.).


GRTgaz recommends protys.fr to facilitate your projects.

This is the first entirely digital platform for on-line declarations and the management of declarations before works and the associated responses, which makes it possible to send DTs and DICTs electronically (for response within nine days).

This is the first 100% digital online platform for declarations, managing declarations of intent, and any associated replies.

This platform is in direct contact with the major network operators (GrDF, RTE, GRTgaz, France Telecom-Orange, Lyonnaise des Eaux, TIGF), all of whom use the same solution to digitally receive and reply to DTs and DICTs.

Protys.fr, the market leader with over 60% of the receipt forms processed in France, is the ideal solution for managing the entire declaration process in a 100% digital format.

For more information, visit www.protys.fr


Types of work affected

All works carried out in proximity of our installations, be they public or private, must submit a declaration in advance.

This legal obligation especially concerns the following works:

  • Soil injection and consolidation projects.
  • Works requiring the use of explosives that many transmit vibrations.
  • Works that dig down to depths of 5 metres.
  • Demolition projects.
  • Planting trees and uprooting stumps with the use of machines
  • Agricultural works (drainage, subsoiling, ditch cleaning).
  • Anchoring, rigging, overground and underground work.
  • Road traffic carrying loads greater than 3.5 tonnes (off-road).
  • Opening and running of mines, open quarries and rubbish dumps.
  • Excavation, construction or modification works: dams, bodies of water, canals or ditches, railway lines, roads, car parks, bridges, underground or overground passes, pits, sports or recreational grounds, building foundations, walls, fences, etc.
  • Building, maintenance, renovation or dredging works: any kind of body of water, navigable and non-navigable waterways, canals.
  • Creation, moving or removal works: pipelines, drains, any kind of buried pipes, various types of intervention work on these installations.
  • Excavation, exploration, horizontal drilling, routing and boring works: by hammering or using other mechanical methods to insert poles, stakes, sheet piling, drilling detectors or any other exploration equipment.

Emergency work requires special handling

Some works, required for purposes of security, safeguarding people or property, ensuring continuity of public services or force majeure, follow an emergency declaration procedure.

Prior to any work, the contractor is obliged to check the single service point to know the emergency numbers for the network operators most likely to have safety implications. The contractor must then call them to be made aware of the instructions to be applied prior to any work and inform those who shall perform the work.

Having received responses from the network operators, the works commissioner carries out the work and sends a notification of emergency work to the network operators.


Penalties for violating the regulations

Where there are work sites that have not been declared or have been declared incorrectly, administrative and criminal sanctions will be levied.

  • Administrative sanctions:
    Administrative sanctions are passed by the DREAL (the local environment, urban development and housing authority). Where there is no Declaration of Proposed Works (DT) or Declaration of Intent to Carry out Works (DICT), where the project manager has not provided the necessary information or deadlines are not respected, the guilty parties will be liable to receive a fine of up to €1,500.

    Sanctions can be levied against works commissioners, those carrying out the works, and the network operators if they fail to reply to declarations.
  • Criminal sanctions:
    Criminal sanctions are passed by a judge in a personal capacity. Sanctions are as follows:
    • Where works are carried out close to a pipeline without a DICT, the guilty party will receive a criminal fine.
    • Where a network is damaged without notifying the operator, the guilty party will be liable for a criminal fine and up to 6 months imprisonment.

Centre de Traitement DT/DICT : informations et numéros utiles

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