 It has diameter of and working pressure of , which is secured by seven compressor stations.The Portovaya compressor station on the Russian coast of the Baltic Sea in the Portovaya Bay near Vyborg has been called "unique" because of its planned capacity and working pressure.Construction of the third line of the Gryazovets–Vyborg gas pipeline began on 9 December 2005 in the town of Babayevo (Vologda Oblast), and it was completed in 2010.