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Wasa Dredging Oy Ltd

Finnish marine construction and dredging contractor specializing in underwater drilling and blasting, backhoe dredging and hard- and soft-soil dredging in Scandinavia and the Baltic region.

Last updated September 26, 2026

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Overview

Wasa Dredging Oy Ltd is a privately owned Finnish marine construction and dredging contractor headquartered in Vaasa, Finland. The company describes itself as a marine offshore and inland water construction company operating mainly in the nearshore waters of Scandinavia and the Baltic region. Its core business is capital and maintenance dredging of fairways and harbours, with particular specialization in underwater drilling and blasting and the dredging of hard materials. Beyond dredging, Wasa Dredging also carries out environmental dredging, reclamation, trenching and backfilling, rock revetment, breakwater and erosion protection works. The company presents itself as having over 40 years of experience in the dredging market and states that it has completed over 200 successful projects. It emphasizes continuous renewal and improvement of its in-house designed equipment, which it says ensures it always has the right tool for the job at hand. Wasa Dredging is a private owned construction company with its own equipment and a solid financial base, and its team consists of highly specialized professionals with relevant education and extensive experience. Wasa Dredging is certified in accordance with ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018. Its head office is in Vaasa, Finland. The company's project portfolio includes work such as dredging of Nakskov harbour and fairway, Port of Oxelösund, NKT Karlskrona, Paldiski 2025, Melkinlaiturin rantavallit, Eteläkärki at the Port of Helsinki, Port of Mukran, Fairway and Harbour of Vaasa, and Skellefteå Harbour. The company's origin story is tied to the Kvarken Archipelago between Finland and Sweden, an area of many islands that is still rising at roughly 10 mm per year due to post-glacial rebound. This environment created a permanent need for small-scale dredging, which formed the backdrop for the company's establishment and its focus on dredging in challenging, shallow and changing seabed conditions.

History

Wasa Dredging Oy Ltd is a Finnish marine construction and dredging company headquartered in Vaasa, Finland. According to its own account, the company has over 40 years of experience in the dredging market. Its formation is closely linked to the geography of the Kvarken Archipelago, the area between Finland and Sweden that consists of many islands. This region was compacted by the weight of the Fennoscandian ice sheet some 6,000 years ago and is still recovering from that load, rising at a rate of roughly 10 mm per year. In this environment, with a need to sail with small vessels and constantly changing seabed levels, there was and remains a permanent need for small-scale dredging. The area also lies on top of the Fennoscandian Shield, a formation created some 3,100 to 900 million years ago, which contains hard rock materials relevant to the company's specialization in underwater drilling and blasting. Over time, Wasa Dredging developed into a marine offshore and inland water construction company operating mainly in the nearshore waters of Scandinavia and the Baltic region. Its main line of operation is capital and maintenance dredging of fairways and harbours, with underwater blasting and dredging of hard material as its specialities. The company also performs environmental dredging, reclamation, trenching and backfilling, rock revetment, breakwater and erosion protection works where required. It states that it has completed over 200 successful projects. The company is a private owned construction company with its own equipment and a solid financial base. It emphasizes continuous renewal and improvement of its in-house designed equipment, which it says ensures it always has the right tool for the job at hand. Its team consists of highly specialized professionals who combine relevant education with extensive experience. Wasa Dredging is certified in accordance with ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018. Its project portfolio includes dredging of Nakskov harbour and fairway, Port of Oxelösund, NKT Karlskrona, Paldiski 2025, Melkinlaiturin rantavallit, Eteläkärki at the Port of Helsinki, Port of Mukran, Fairway and Harbour of Vaasa, and Skellefteå Harbour. These projects illustrate the company's focus on port and channel dredging, trench dredging and environmental dredging across the Baltic and Scandinavian region.

  • Wasa Dredging states it has over 40 years of experience in the dredging market.

  • Company reports having completed over 200 successful projects.

  • Certified in accordance with ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018.

Products and positioning

Specialist marine contractor for demanding dredging and underwater rock works in Scandinavia and the Baltic, combining in-house designed equipment with over 40 years of dredging experience.

  • Capital and maintenance dredging of fairways and harbours

  • Underwater drilling and blasting

  • Backhoe dredging

  • Dredging of hard and soft soils

  • Environmental dredging

  • Reclamation

  • Trenching and backfilling

  • Rock revetment, breakwater and erosion protection works

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