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Marine Construction & Dredging

We can undertake any marine civil construction task:

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- Sea wall installations & maintenance

- Pipeline installations & maintenance

- Cathodic protection installation & maintenance

- Underwater cutting of steel (Broco) concrete (ring saw) or wood (chainsaw)

- Underwater welding (& topside welding)

- Wharf and pile work e.g. denso wrapping, bracing, regrouting

- Subsea cables - inspection and repair- Mooring installation & inspection

- Scour protection

- Underwater demolition

 

Dredging

Dredging is the excavation of accumulated sediment, debris or sand which has often built up and is constricting flow and functionality of the asset. Our methodology varies depending on many variables, but is achieved by diver-directed hydraulic submersible trash pumps, Venturi dredges or air lifting equipment. The sediment dredging process involves removing the sediment and re-depositing the material either in an appropriate area which suits the client, or to reduce environmental impact, in a sediment bag or sediment settling area. We can dredge from the waters edge or from a vessel. 

Auckland's Downtown Ferry Terminal
nderwater cutting of steel pile using Broco torch during marine demolition

Dredging and silt boom - enviromental protection

Silt boom deployed for environmental protection during marine dredging
CDS commercial diver entering water at wharf construction site
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