Post-Lay Rock Placement LoI for Nord Stream Project Signed

The rock that will be used is planned to be sourced from countries on the Baltic Sea coast. The rock material has to meet certain engineering and environmental criteria. Material has to be free from clay, silt, chalk, vegetation, or other deleterious substances. It will behave as any existing inert material on the seabed and will be re-colonised within a few years. In shallow waters, algae will soon populate exposed surfaces and in deeper water where oxygen and light are scarce, the surface of the rocks will be colonised by micro-organisms.