Järviluoto settling basin being prepared to receive contaminated soil
Port of Rauma was granted in the spring of 2020 a permit to relocate contaminated dredged soil into a specific basin part in the southwest corner of Järviluoto, originally built in the fairway dredging project in 2016–2017.
In the fairway project, the basin served as a settling basin to drain away water that accumulated with the suction-dredged material in the actual stockpile basin.
“The total volume of the basin is about 100 000 m3 and it is about 2 hectares in area. Preparatory works, which include the forming of an internal slope, the installation of a filter fabric and the building of a one-metre thick moraine layer, are carried out by Terramare Oy. The objective is to ensure a tight structure to prevent harmful substances from entering the sea”, explains Technical Director Timo Metsäkallas from Port of Rauma. “The soil layer is built using moraine dredged from the bottom of the sea and piled in the area during the fairway construction works”, Mr. Metsäkallas continues.
The works will be completed by the end of September and contaminated soil dredged from under the causeway will be placed there already in October.