Rohde Nielsen dredgers at work for mega reclamation in Copenhagen

      The Ask R sailing to Lynetteholmen

By the beginning of 2022, construction has started of the Lynetteholmen reclamation project in Denmark.
An area of some 275 hectares is to be reclaimed that will form a peninsula between Refshaleøen, a former industrial area in the harbour of Copenhagen and Kronløbet, i.e. the access channel to the city's port.

Lynetteholmen is a project of the development company and port authority By & Havn, which is 95% owned by the City of Copenhagen and 5% by the Danish state.
The project is part of the city's overall storm surge protection plan and will protect coastal and central urban areas against future flooding.
The new land will also provide room for about 35,000 inhabitants as well as allow for the beneficial and environmental friendly reuse of surplus material of planned construction projects in and around Copenhagen.

The reclamation is to be realised in two stages, the first one covers the area just east of Refshaleøen and the second one the area north of it.
Both stages will start with preparative activities that are needed before surplus material from other construction projects can be received.
These activities amongst other comprise dredging, sand filling, rock placement, sheet pile installation and road construction.
The construction work for stage 1 is scheduled to be completed in 2023 while stage 2 will start in 2024 and finish in 2027.
Further filling of the entire area with surplus material can take up until 2070, depending on the progress of other projects.

By the end of 2021, By & Havn has tendered two contracts for stage 1 of the project, one for the marine works and one for the civil works.
The marine contract, which comprises dredging, sand filling, quay wall construction and stone works, has been awarded to the Danish construction company Per Aarsleff A/S.

      The Ask R discharging at Lynetteholmen

For the dredging and sand filling, Per Aarsleff has made an appeal to Danish dredging and offshore company Rohde Nielsen.
Some 220,000 m3 of material had to be dredged at the Lynetteholmen site, of which in view of contamination 50,000 m3 has been placed in a confined disposal site at shore and 170,000 m3 was relocated offshore in the Køge Bay.
These dredging activities were needed to remove soft soil from the construction site as well as for the deepening of a local navigation channel.
For these activities, Rohde Nielsen has deployed the bucket ladder dredger Ajax R, the backhoe dredger Mjølner R, the grab dredger Heimdal R and several split hopper barges.
The contaminated material that had to be stored in the confined disposal site was brought to shore bu the hopper barges were they were unloaded by a hydraulic excavator, a second excavator equipped with a dredge pump took care of dispersing material further away in the disposal site.

For the sand filling, representing some 600,000 m3 of material, it has started with the 6,000 m3 trailing suction hopper dredger (TSHD) Balder R for the bulk part, later it was relieved by one of the company's latest acquisitions, the 2,700 m3 TSHD Ask R for precision placing of the material for the new break water.