Also known as «dam-weight». This awesome construction has a water reservoir of approximately 53 millions m3 of dammed up waters, along 23 km. It is 104 m tall and its base is 100 m wide. This dam is self-sufficient, therefore it can resist the strong pressure from these waters. In order to control the variations in the Rhone River flow, two evacuating canals have been built on both sides of the dam on each of the banks.