The 120 kilometres long ship fairway from Utö to Naantali was completed to the depth of 15.3 metres in its entirety in 2010.
Dredging was carried out in 24 places. The last one was the Motonmatala shoal off Neste’s Naantali oil refinery.
The deepening of the shoal made it easier for tankers to arrive in the Port of Naantali. After the completion of the deep fairway, the biggest tanker in the Baltic Sea region were able to call in the port of Naantali with a full load of 100,000 tonnes.