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The Grand Tortue Ahmeyim gas field
BUILDING THE DEEPEST

SUBSEA STRUCTURE

IN AFRICA

Carrières
Quarry at
Hajar Denben
275km
Port of Nouakchott
Port Nouakchott
Breakwater
Landing page:
Gas MAURITANIA
field eiffagegeniecivil.com/projects
Champs Video:
youtube.com/
Hub/Stockage caissons
SENEGAL watch?v=pPDGXBhom1Y
Port Dakar

Off the coastlines of Senegal and Mauritania is the a natural gas storage and export FLNG vessel can begin
Grand Tortue Ahmeyim gas field. At nearly three extraction, a protective breakwater must be built.
kilometers deep, it could produce an estimated Contractor Eiffage Génie Civil Marine is charged with creating
15 trillion cubic feet of natural gas. That’s enough that breakwater. At 10 kilometers from the shore, it will consist of
for 30 years of production and to make the two a subsea riprap foundation and giant caissons that can handle
countries autonomous in terms of energy. the highly stressful, ultra-deep-water conditions and sea swells
that could damage the FLNG vessel and disrupt production.

“This is a major project for Senegal and Mauritania, and the first To deliver the material required for the underwater
step toward becoming more energy independent,” said Thibault embankment a fleet of Cat equipment is needed, including
®
Seneclauze, Key Account Manager with Cat dealer JA Delmas. “It about 8 excavators and 16 wheel loaders equipped with
will certainly improve quality of life and present new opportunities.” the new Cat Advansys™ ground engaging tools.
Petroleum company BP has teamed with Mauritania, “A newly established quarry will provide the 2.5 million tons
Senegal and Kosmos Energy to recover the liquified natural of solid granitic gneiss rocks needed for the foundation,”
gas (LNG). However, before a new offshore complex and said Hervé Marlenc, Quarry Manager at Eiffage Génie

8 Cat Magazine