Projects

Port Coogee Marina

Coogee

Client

Australand

Engineers

Sinclair Knight Merz

M.P. Rogers & Associates

Total Value = $60,000,000.00

Project Details

RJ VIincent's expertise in marina construction has come to the fore with this long awaited development. With over 10 years in the planning RJ Vincent commenced work on this prestigious project early in 2006. 

The first step was to construct nearly 2Km of marina breakwaters and seawalls stretching out into the Indian Ocean to depths of up to 10m below sea level. This was carried out as a separate contract with marine design engineers MP Rogers & Associates and breakwater specialists, Rocktec. The armour and core rock required for the seawalls was produced from another of RJ Vincent's sites at Landcorp's AMC development in Henderson. Specialised blasting and sorting of the rock enabled efficient placement at the breakwater location all with careful environmental monitoring of the sensitive marine life in Cockburn Sound. Some 3,000 tonnes of rock were delivered and placed per day.  

Following the start of the breakwater construction the marina earthworks commenced with SKM design engineers. The plan was to earthwork nearly 2 million m3 of material in a cut to fill operation of which over 1 million m3 was to be placed within the breakwaters forming two reclaimed islands and northern and southern reclaimed areas adjacent to the seawalls. This process was complicated by the requirement to keep Cockburn Road open to the public, a major road running through the site, which meant our 50T articulated dump trucks delivering some 7,000m3 per day underwent significant traffic management control when crossing the Road at the temporary traffic lights.  

Our suggestion to contain the fill within Manufactured Select Fill (MSF) rock bunds for the island and reclamation works was welcomed and the reclaimed areas were filled efficiently. To obtain compaction we used the High Impact Energy Dynamic Compaction Method with all results meeting the required specification.

To set Port Coogee apart from other marina developments the 2.25Km of marina edge wall treatments were designed using precast concrete panels. Again, following our recommendation and input the final design allowed for the precast panels to be manufactured and installed in a two process method where the panels were attached to anchor blocks at an accessible level which was imperative when dealing with the tidal movements that were experienced.  

In addition to the marina construction RJ Vincent & Co have also completed the road infrastructure, service installation and retaining wall construction to some 150 lots in Stages 1 and 4A.

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