Mont Saint-Michel has been imprisoned by sand for over two hundred years. If the sea cannot be brought back to surround the island by 2020, it could disappear altogether. DTP is responsible for the hydraulic engineering works designed to remove sand from the bay: the teams have created 2 channels, one to the east of the island and one to the west. They are also constructing a seawall divider that will channel and accelerate the flow of water released from the dam which will carry away the silt and help rescue Mont Saint-Michel from the sand.