The pipeline passes through the waters of five Baltic Sea nations, each with their own unique set of conditions. Find out which activities will take place in each country.
The planned pipeline route will cross the territorial waters of Russia, Denmark and Germany, along with the Exclusive Economic Zones (EEZ) of Russia, Finland, Sweden, Denmark and Germany. Thorough preparation is key: 55,000 line kilometres of seabed surveys were conducted to define the optimum route for the twin pipelines, while detailed engineering and logistics plans were laid out. The varying topography of the Baltic seabed means that in certain places, preparatory works must be performed before pipelaying begins. This includes rock placement at specific locations along the route to create supporting berms where the seabed is uneven, for example.
In the shallow waters near the Russian and German landfalls, dredging will also take place to bury the pipelines and protect them from hydrodynamic load due to waves or currents. The entire route will be cleared of potential munitions where necessary. Use of dynamically positioned pipelay vessels also reduces the need for munitions clearance and thus the risk of potential impacts. After pipelaying has begun, post-lay surveys will be performed to determine where additional support, stabilisation or protection is needed with post-lay rock placement and ploughing.