The dredging work of Lake Hossegor will make it possible to recover a majority of the removed sand by depositing it at the beach of Savane of Capbreton strongly impacted by erosion. The studies showed the good quality of the sediments of Lake Hossegor and their particle size compatibility with those of Capbreton Savane beach facilitating the operation. The transfer of these 130 000 m³ will be done through the use of pipes and installations of the bypass of Capbreton. The sand thus deposited will protect the beach from erosion and allow to study the impact of the swell on this sand deposit.