Port Nelson: Calwell Slipway Cleanup Works Completed

Image source: Port Nelson

New Zealand’s Port Nelson said in its latest announcement that Heron Construction has completed site disestablishment and restoration works at their Calwell Slipway, meaning that the project is now fully completed.

We have been successful in achieving the remediation targets. The target concentrations for residual sediments remaining in the Calwell Slipway Basin was 270 mg/kg for Copper and 0.07mg/kg for Tbt, and these were deemed to be met when the 95% Confidence Limit of the rolling mean met these levels,” Port Nelson said in its release.

At the conclusion of site works and validation sampling these remedial targets had been exceeded with a final result of 42mg/kg for Copper and 0.039mg/kg for Tbt.”

Additionally, more material was dredged than they initially projected with the final dredge volume being 32,516m³, and this meant the mudcrete produced and placed in the reclamation was 58,781T.

The second remedial objective was to restore navigability to the Calwell Slipway Basin which had not been dredged since 1984.

Post dredge hydrographic survey indicates that charted depths have been restored, and in many locations within the basin they have been exceeded, said Port Nelson in the official statement.

Check out this time-lapse capturing the remediation and reclamation process at the Calwell Slipway Basin from October 2017 to completion in June 2018:

 

Share this article

Follow Dredging Today

Events>

<< Sep 2018 >>
MTWTFSS
27 28 29 30 31 1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30

Port Development Middle East Conference 2018

Join SOHAR Ports and Freezone, DP World, Port of Salalah, Port of Duqm, Aqaba Development Corporation, ASYAD Group…

read more >

THE 12TH NIGERIAN DREDGING SUMMIT AND EXHIBITION

The 12th Nigerian Dredging Summit and Exhibition will convene the stakeholders and the right chief executives…

read more >

International Days of Dredging 2018

CEDA African Section is pleased to invite paper submissions for the next International Days of Dredging, which…

read more >

34th Annual International Conference on Soils, Sediments, Water, and Energy

The conference promises to be an exciting opportunity for all those concerned with the challenge of developing creative, cost-effective…

read more >

Jobs>

Looking to fill a job opening?

By advertising your job here, on the homepage of DredgingToday.com, you'll reach countless professionals in the sector. For more information, click below...

apply

Dredging jobs in Abu Dhabi at NMDC

National Marine Dredging Company “NMDC” aims to be the largest dredging player in the Arab’s Gulf region...

apply

Looking to fill a job opening?

By advertising your job here, on the homepage of DredgingToday.com, you'll reach countless professionals in the sector. For more information, click below....

apply