Bay of Biscay: New geophysical and geotechnical studies

In: CablesInterconnectors
10/09/2020
The electricity transmission network, RTE will carry out new studies at sea and on land for the proposed link between France and Spain, Bay of Biscay. The new geophysical and geotechnical studies aim to explore technical solutions for bypassing the Capbreton canyon.

Previously, studies identified a major technological challenge in the crossing at sea of ​​the Gouf (canyon) of Capbreton, an unpredictable instability of the ground, at the edge of the canyon.

Studies will be conducted in the north and south of the Capbreton canyon (Landes), and in the Médoc, at Le Porge (Gironde).

In the Capbreton sea area, two soundings will be carried out by a 56-metre-long platform, about 700 metres away from the beach. These operations will be carried out during the last two weeks of September. Prior to the arrival of the platform, two ships will work further offshore for one to two days in September. On land, geophysical surveys will be conducted during the first two weeks of September, followed by surveys in the first two weeks of October.

In the town of Le Porge, surveys and sounding will be done at the landing points of submarine cables, in the third week of September. A platform similar to Capbreton will be installed at La Cantine.

The 2GW Bay of Biscay, has been listed in both the current TYNDP list and Projects of common interest (PCI) list. The interconnector is expected to double electricity exchange between the two countries and is scheduled to commission in 2027.

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