The pipeline begins on Russia’s Baltic Sea coast and extends into a 114-kilometre offshore section of the pipeline. Each step of construction has been planned to minimise environmental impacts.
The starting point of Nord Stream 2 is located near Narva Bay in the Kingisepp district of Russia’s Leningrad region, where the pipeline will connect to the Russian gas network. Gas will be fed into the pipeline from the Slavyanskaya compressor station, operated by Gazprom. The compressor will raise the pressure of the gas to the level required for secure transportation along the entire pipeline without intermediate compressor stations.
Construction of the Russian section is divided into a 3.7 kilometre-long segment onshore and a 114 kilometre-long segment offshore. It starts 3.8 kilometres away from the shore with the landfall facilities that include the pipeline inspection gauge (PIG) trap area and shut-down valves, as well as systems to monitor the incoming gas flow and ensure safe operation.
The Russian onshore section of the pipeline passes through the Kurgalsky nature reserve. To ensure the smallest possible environmental footprint, this section will be built using an innovative open-cut construction method. Trench boxes will be deployed to reduce the width of the construction corridor and related impacts by some 50 percent.
The technique also helps to preserve local hydrology, since no draining of the trench is required for pipeline installation. Upon completion of construction, the entire area will be reinstated. Only a 30 metre-wide corridor directly above the pipeline will be kept free of trees, as required by Russian safety standards. Vegetation will be allowed to return to this area naturally.
Nearshore and offshore construction activities will be performed using two state-of-the art pipelaying vessels, with these two sections of the pipeline later joined by above-water tie-in.
Throughout construction, comprehensive environmental monitoring will be carried out for the onshore and offshore sections to ensure that actual environmental impacts do not exceed thresholds outlined in the environmental impact assessment report. Responsible authorities will conduct external oversight.