Sarens Polska supplied multiple cranes and SPMT's for the drilling of a tunnel under the Dead Vistula river in Gdansk. The tunnel is the longest underwater tunnel in Poland with a length of 1.3km. It will be a crucial part of the inner ring of Gdansk connecting the airport, the seaport and the city center. This is the first underwater tunnel in Poland which uses one of the biggest Tunnel Boring Machines in the world.