Hanö, Offshore Services

Offshore Services at Hanö in Nogersund, Sweden

Rohde Nielsen was awarded a contract by the client NCC, related to the transport of wastewater from the island of Hanö to the sewage treatment facility in Nogersund, Sweden.

The contract scope involved dredging a 6 km long trench, at water depths differing from -3m to -30m. The Backhoe Dredger, Mjølner R, executed the dredging in the shallower sections but got replaced by the Offshore Multipurpose Vessel, Heimdal R, in the deepest areas.
All the installation works in the trench, including pipe- and cable lay were successfully executed by Heimdal R, where our units subsequently did backfilling in all trench sections.

The units Mjølner R, Heimdal R, Skjold R, Toste R, Rimfaxe R, and Njord R were all allocated to the project and carried out the job impeccably.

  • Location: Hanö, Sweden
  • Scope: 3 x 6 pipes and 6 km cable
  • Client: NCC Sweden AB
  • Year: 2022

The fleet that made it possible

  • Njord R
  • Toste R
  • Heimdal R
  • Mjølner R
  • Rimfaxe R
  • Skjold R
Hopper capacity
6,000m3
Length overall
111.30m
Breadth
19.40m
Draught loaded
7.00m
Draught unloaded
3.80m
Dredging depth
35.00/75.00m
Hopper capacity
535m3
Length overall
45.70m
Breadth
10.50m
Draught loaded
3.50m
Draught unloaded
2.20m
Dredging depth
up to 100.00m
Hopper capacity
2,100t
Length overall
84.00m
Breadth
18.70m
Draught loaded
5.80m
Draught unloaded
3.80m
Dredging/Installation depth
up to 100.00m
Bucket size
3.5-16m3
Length overall
51.50m
Breadth
17.00m
Draught
1.80m
Depth
3.00m
Dredging/Installation depth
22.00m
Length overall
23.35m
Breadth
8.00m
Draught
2.10m
Main engine
2x634kW
Speed
10.5kn
Length overall
11.80m
Breadth
3.95m
Draught
1.15m
Speed
33kn

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