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DIAMOND HARBOUR  WHARF UPGRADE & PONTOON CONSTRUCTION - CHRISTCHURCH

 

The concrete pontoon build was completed by Hunter Civil construction teams who pre-cast the pontoon in separate units, followed by joining them to one unit in Lyttelton Harbour. The units were then towed across from Lyttelton to Diamond Harbour for installation with the assistance of a subcontractor's tugboat.

The wharf upgrade included repair of piles, replacement of timber decking, replacement of timber handrails, repairs of the timber stringer beams and relocation of the heritage crane. There was also specialist diving works completed by Hunter Civil's dive subcontractors. Hunter Civil worked closely with the ferry operators, public and private stakeholders to ensure disruption to services were minimal. The project was scheduled to allow for stakeholder access throughout the duration of the project.

The environmental considerations on the project were blended into the construction methodology seamlessly. The project required observation of marine mammals for the duration of piling works. Hunter Civil had several DOC qualified Marine Mammal observers within the business that fulfilled this project requirement. This included undertaking daily marine mammal observations, sightings and completing watch forms.

DURATION 

Aug 2022 – May 2023

CLIENT

Christchurch City Council 

CONSULTANT/DESIGNER

Calibre Group

VALUE

$2,300,000.00

This project involved the repair of the existing wharf at Diamond Harbour and included the design and build of a new floating pontoon and ramp adjacent to the wharf. The project was split into three separable portions of work; wharf upgrades, piling works, concrete pontoon design, build and installation.

The piling work for this project was completed with Hunter Civil's 65T crane setup on a subcontractor's 500T self-propelled barge. All material, plant and equipment was barge based with a temporary works piling gate installed to drive all piles. The piling method was a combination of vibro-hammer driving and drop hammer driving.

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