In the end of July 2018 a joint venture consisting of Wasa Dredging and Van Oord Marine Contractors signed two separate contracts regarding a big project in Kokkola Harbour and Fairway. The project consists of a diversity of different elements including UXO masses, contaminated masses, drilling and blasting of underwater rock, dredging of hard and soft masses, building of new bunds as a foundation for quay walls to be built later, construction of erosion protection in the harbour, installation and movement of navigation marks. The project also includes various environmental monitoring and control schemes such as installation of silt curtains and weirboxes.


Wasa Dredging is leading the joint venture in this project while Van Oord provides their extensive expertise in dredging works in general and hopper-dredging works in particular.


This project kicked off during the fall of 2018 when Wasa Dredging mobilized two dredging units: the newly purchased “Harald” was to handle the contaminated masses with a special environmental grab while “Optimus” was mobilized to handle all of the UXO material. As there is a risk of UXO material containing explosives Optimus was fitted with armored plates and bulletproof glass to protect the crew members from possible explosions.


The works in Kokkola will be executed from October 2018 to September 2020 with breaks during the winters when the water freezes. The dredging of the UXO and heavily contaminated material will be done 2018. During 2019 the blasting and hopper works are to start.

Project is still ongoing so the exact masses are still to be determined.

More references


The Project for Wasa Dredging’s part started in June 2018 as a subcontractor to the main contractor Dragados, the client for the project is Aberdeen Harbour.


Wasa Dredging was awarded this contract as a main contractor in 2016 and the deepening of the southern fairway into Rauma began in the spring of 2016.


The Port of Kalundborg decided with a public tender in 2017 to implement the plans to enlarge its port area.


Wasa was in May 2016 awarded a contract in the port of Klintehamn in Gotland, Sweden to dredge and re-use limestone from the fairway and harbour basin.


In 2015 Wasa Dredging was awarded the contract of deepening the fairway into Oslo, the capital city of Norway.