The cave has been christened "Marie Lesimple" after the geologist who first entered it with engineer Salah-Edinne Chatouani. It is apparently several million years old, and yet no trace of life has been found in it.
"You feel so small and insignificant when you look at these wonders of nature” said Loïc Thevenot, Underground Works Manager for Eiffage Génie Civil, admiring the impressive scenery on this incredible site.
May we remind you that Janots tunnel (135 m long with a 3.5 m diameter) bored by TBM Augustine is to bring water from Marseille Canal from Cassis to La Ciotat (Bouches-du-Rhône). The project is scheduled for completion in late 2018.
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09.06.2026Toulouse metro: tunnel boring machine Lise Enjalbert...Our tunnel boring machine, Lise Enjalbert, and its team have achieved a crucial milestone with the second breakthrough at the future Blagnac station. -
03.06.2026Three new service quays completed in Grand-Lahou, Côte...Our Eiffage Génie Civil Marine teams have finalized the construction of three new service quays, each measuring 20m x 12m. -
29.05.2026Toulouse metro: TBM Jeanne Marvig completes its second...The Jeanne Marvig tunnel boring machine (TBM) has successfully completed its second breakthrough, breaking through the diaphragm wall of the future Fontaine Lumineuse...