Jan De Nul was established in 1938, by its founder Jan De Nul, as a Civil Engineering Construction Company. In 1951, expansion towards dredging started and evolved into its main activity in which Jan De Nul has become a world leader.
A combination of more than 4500 staff and employees together with the world's most modern and technologically advanced dredging fleet, ranks Jan De Nul Group at the top of the international dredging industry. The Jan De Nul Group's massive expansion policy with respect to its new dredging fleet capacity is unequalled in the dredging sector.
This modern, diverse and well-balanced fleet of dredgers and specialized auxiliary equipment together with the Company's continuing policy of research and development into dredging technology provide flexibility to execute dredging, reclamation and maritime related works of any kind, size or nature, including:
Capital dredging and maintenance works in ports, harbours, rivers, etc;
Reclamation of port and industrial areas;
Rock dredging in open sea conditions;
Dredging of shore approaches and trenches for offshore pipelines and outfalls;
Sand wave dredging in open sea (pre-sweeping);
Pipeline stabilization and protection by rock dumping;
Coastal defence by means of beach replenishment;
Oil recovery and cleaning operations;
Dredging, treatment and disposal of contaminated soils;
Specialized alternative dredging methods to reduce or avoid environmental impact on marine related works.
Salvage and heavy lifting;
Soil remediation, confined waste disposal, sludge treatment and organic waste recycling by means of its subsidiary company 'ENVISAN'.
Investment in new vessels and equipment together with the use of advanced and modern technology has always been Jan De Nul Group's policy. The Company owns, operates and is in the process of commissioning the following items of major dredging equipment :
14 cutter suction dredgers with installed diesel power ranging from 350 to 27,240 kW including the world's most powerful self-propelled cutter dredgers such as the 'JFJ De Nul', the 'Leonardo da Vinci' and the 'Marco Polo', including 4 dredgers with an installed diesel power of 23.250 kW each under construction;
26 trailing suction hopper dredgers with hopper capacities ranging from 2,320 to 46,000 m³ including the 'Vasco da Gama', the world's first mega dredger. Two extra large jumbo trailing suction hopper dredgers, the 'Cristobal Colón' and the 'Leiv Eiriksson', with a capacity of 46,000 m³, the largest of the world, 1 trailing suction hopper dredger with a capacity of 30,500 m³, 2 trailing suction hopper dredgers with a capacity of 7,500 m³, 1 trailing suction hopper dredger with a capacity of 3,700 m³ and 2 trailing suction hopper dredgers with a capacity of 3,400 m³ are under construction;
20 sea going self-propelled splitbarges with hopper capacity ranging from 1,800 m³ to 3,700 m³;
Two side stone dumping vessels of 1,800 ton and 6,000 ton (under construction);
One 32,500 ton fall pipe vessel (under construction) with capability of rock dumping in 1,700 m water depth;
5 backhoe dredgers, among which 3 Type Backacter 1100 with a maximum grab capacity of 40m³ (2 of this type under construction); the latter being the new generation of backhoe dredgers;
2 floating cranes with lifting capacity of respectively 440 tons and 3,300 tons;
Various auxiliary equipment and support vessels including multi-purpose handling tugs, crane and survey vessels;
One oil recovery vessel;
17 rock transport barges ranging from 1,800 tons to 10,250 tons.
Major projects include :
Construction of the Manifa Field Causeway and Islands in Saudi Arabia. The value of the contract of over 1 billion USD makes it one of the largest dredging contracts in recent years. The scope of this project comprises the design and construction of 41 km of main causeway and associated lateral secondary causeways which will provide vehicle and service access to 25 drilling/production islands and two water injection islands. The proposed scheme also includes the design and construction of bridges and culverts, dredging and reclamation works, berthing areas, roll-on/roll-off (Ro-Ro) facilities, roads and removal of existing subsea pipelines.
The reclamation works of seven islands of the multi billion dollar Waterfront Project in Dubai, covering 2,300 hectares and involving more than 300 million m³ of sand and 12 million m³ of rock for protection against erosion. This project, mainly executed by Trailer Suction Hopper Dredgers, will take approximately six years to complete. The first island will take 18 months to construct.
The ongoing 18 year concession contract for the deepening and the maintenance dredging of the 'Río Paraná and Río de la Plata' River in Argentina was designed to increase the navigability of the river so as to provide improved communications and trade opportunities for Argentina's inland river conurbations. This project extends over approximately 790 kilometres from the entrance of the Port of Santa Fe on the Paraná River till Punta Indio, 240 km on the Río de la Plata.
The ongoing 1,400 ha land reclamation project for housing and residential purposes at Pulau Ubin and Pulau Tekong in Singapore. Involving the filling of approx. 200 million m³ of sand, capital dredging of waterways, the construction of an offshore dumping ground for disposal of 24 million m³ of soft clays, the construction of a staging area on the mainland and bund construction works over a length of 15 km. The project is scheduled to be completed by 2009.
Palm Island Jebel Ali, in Dubai. A project whereby a peninsula with 4 km diameter in the form of a palm tree surrounded by a crescent with 6 km diameter is created.
The successful excavation of so-called 'Glory Holes' in Canada in challenging soil and seastate conditions. The works have been executed in the Atlantic Ocean approximately 350 km east of Newfoundland at a dredging depth of over 130 m in stiff clay with boulders and served to protect subsea wellheads against scouring of icebergs on the sea bed.
At the island of Sakhalin (East Siberia), pre-trenching and backfilling of offshore pipelines including boulder removal and construction of cofferdams were executed in difficult seastate and arctic weather conditions at very remote locations.
The extension of the existing LNG Port at Ras Laffan in Qatar. The 2 billion dollar contract implies the dredging of 20 million m³ of limestone, the reclamation of 25 million m³ of offshore sand, the quarry and placing of 18 million ton stone and the construction and placing of 1 million m³ of concrete blocks for the construction of breakwaters that will protect the new harbour.
The development of Jebel Ali Container Terminal in Dubai. Deepening of the port basin, involving 23 million m³ of material, dredging of a trench for the future quay wall, construction of rubble mound breakwaters and revetments in a length of 9 km, involving a total rock quantity of 2.5 million m³, 8 million m³ of earthmoving, construction of 1.7 km of floating breakwaters to provide a safe berthing of vessels, and provision of navigation aids required for Stage I of the New Container Terminal.
The construction of the Brussels North Water Treatment Station in the framework of a EPC-Turnkey contract. The station is designed to clean the waste water of the equivalent of 1,100,000 inhabitants. The design, engineering and construction of the concrete buildings / infrastructure is part of Jan De Nul N.V.'s responsibilities. Before the start of the construction works the heavily polluted site needed to be completely cleaned, which was done by the environmental division of the group, Envisan n.v.
Commitment to Quality and Safety:
The management of Jan De Nul is committed to a strict priority for safety and quality control and has installed the necessary internal departments to implement this commitment. The quality of our service within the industry and to our Clients is witnessed by our ISO 9001:2000, ISO 14001:2004 and OHSAS 18001:1999.