Bank of Actions

Bank of Actions

Are you seeking examples or inspiration for water protection? There are plenty of potential actions to choose from! The Bank of Actions will provide your organisation with concrete ideas and examples of water protection activities implemented by organisations in the Baltic Sea Challenge network. You can browse these according to the theme, type of actor, country, year or keyword.

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Environmental dredging of contaminated sediments

Actor: Port of Turku   ●   Year: 2009   ●   Address: Linnankatu 90, Turku, Finland

The environmental dredging of River Aurajoki was done by the Port of Turku during October 2008 - January 2009. The total mass of sediments that was moved by stabilising to the special lagoon of Pansio was about 88 000 m3.© Port of Turku


Contaminated sediments had been found widely on the lower reaches of River Aurajoki. According to the examination tributyltin (TBT) appeared across the sediments of the seabed (0-20cm), furthermore, levels of some heavy metals were also high.


The bottom sediments of River Aurajoki’s lower reaches were cleaned. Because of this, it was possible to eliminate spreading of contaminants to the area affected by River Aurajoki discharge, straits and harbour. From the Port of Turku’s point of view, the dredging was a preventive action. In the future the solid substances discharged with the currents are cleaner than before and will not cause problems for the maintenance dredging of the port.

Background information

The action was voluntary. The port found it necessary to carry out the environmental dredging as a preventive action. The EU-Life STABLE project was also a part of the action. The project developed process handling technique of the contaminated sediments in the special lagoon of Pansio.

Further information

Name: Markku Alahäme   ●  Email: markku.alahame (a)   ●  Web page: