Project owner GDDKiA has published before-after photographs of the CREG Tunnel Boring Machine after it excavated under the Świnoujście Sea.

1,780 metres long Świną tunnel between the islands of Uznam and Wolin will be the longest underwater crossing in Poland with 1,484 meters under the water.

The tunnel is being constructed by GÜLERMAK and PORR

https://twitter.com/GDDKiA_Szczecin/status/1455961090597298177

https://www.eswinoujscie.pl/2021/11/04/tunel-w-swinoujsciu-zobacz-jak-wyglada-tarcza-przed-i-po-zakonczeniu-pracy/