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
- 35.00/62.00m
- 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
- 3.5-16.0m3
- Length overall
- 51.5m
- Breadth
- 17.0m
- Draught loaded
- 2.0m
- Towing draught
- 3.8m
- Dredging/Installation depth
- 22.0m
- Length overall
- 23.3m
- Breadth
- 8.0m
- Draught
- 2.1m
- Main engine
- 2x634kW
- Speed
- 10.5kn
- Bollard pull
- 22t
- Length overall
- 11.8m
- Breadth
- 3.9m
- Draught
- 1.3m
- Speed
- 33.0kn
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Dredging a 6 km long trench, at water depths differing from -3m to -30m….
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