Ever since the 1970s, the Port of Gothenburg has had a permit to deposit polluted dredging spoils at Torsviken, close to the port on Hisingen. The material has mainly been placed in an embanked area at the southern end of the bay. The permit expired in 2009. The port now wants to cover the spoils and, as far as possible, reinstate the area to its original condition with a rich variety of wildlife and birdlife.
Clean clay from the new tunnel
Before the wetland can be created, reinforcement work needs to be carried out and the dredging spoils will then need to be covered with clean material. This is where the new Marieholm Tunnel comes into the picture. The construction of a tunnel in central Gothenburg involves the excavation of large volumes of clay. This glacial clay can be used to cover the polluted land and by doing so create a protective barrier.
The wetland is expected to be completed in 2020.