Carried at arm’s length by five construction machines, the one-kilometer portion of gas pipeline lands delicately, 100 meters by 100 meters, at the bottom of the trench dug in the Finistère countryside, in Châteauneuf-du-Faou. 98 km long, the new gas pipeline, whose shapes hug the topography like a snake, will cross southern Brittany by the end of the summer, between Pluvigner (56) and Pleyben (29). An operation carried out under the orders of a real orchestra conductor responsible for directing, in just a few hours, the laying of a kilometer of steel pipe protected by an anti-rock felt.
“The site began on March 1 with the opening of the tracks”, explains Emmanuel Meunier, the GRT gas engineer, in charge of the works punctuated by four boreholes directed under the rivers, including one of 1.2 km, carried out at 27 meters deep under the Scorff. The laying of the new pipeline will be completed in September for commissioning at the end of the year.
For Landivisiau but not only
At the height of the construction site, some 800 people took part in this time trial launched with the construction of the Landivisiau gas plant (29) that the gas pipeline was to supply. Portuguese, Spanish, Belgian, German and even French teams are advancing the trench in which finely crushed backfill is deposited before receiving the pipe, previously welded in portions of one kilometer.
A few meters upstream, a wetland, protected during the construction period, will be the subject of special treatment. One of GRT gaz’s commitments, which provides for monitoring measures for natural areas and compensation for farmers whose plots have been crossed.
A 160 M € project
Funded by gas consumers, the € 160 million project does not only meet the needs of the Landivisiau gas power station, which will be commissioned against a backdrop of declining gas consumption. For Amaury Mazon, Regional Center Atlantique GRT gaz delegate, the gas pipeline is also justified by demographic change, the development of road gas (seven stations connected to the network in South Brittany) and the growth of cogeneration among Breton market gardeners: l he equivalent of 200 MW installed in the space of ten years, the heat of which heats the greenhouses and the electricity feeds the Enedis network.
The desire of Barbara Pompili, the Minister for the Ecological Transition, to ban gas in new constructions, from 2024, annoys gas companies but does not change anything. “This consumption is marginal,” underlines Amaury Mazon.
Carbon neutrality in 2050
The gas will also be more and more of renewable origin, depending on the transport network. If the biomethane injected into the network today represents 3% of consumption, it should reach 10% by 2025. Given the announced drop in consumption, the development of anaerobic digestion, biomass and hydrogen d renewable origin, GRT gaz plans to achieve carbon neutrality in 2050.
Under these conditions, the new gas pipeline, supplied from next winter by LNG carriers docking at the Montoir-de-Bretagne terminal (44), must meet Brittany’s needs for the next 80 years.
Support a professional editorial staff at the service of Brittany and the Bretons: subscribe from € 1 per month.