Pluto LNG Jetty PROJECT DETAILS:

Location: Burrup Peninsula, North Western Australia

Contract Value: A$200 million (2007)

Contract Period: November 2007 - November 2009

Safety Statistics: Manhours: 850,000

LTIFR: 1.19

CLIENT: Woodside Burrup Pty LtdScope of Work:In November 2007 the Harbourworks Clough Joint Venture (HCJV, now BAM Clough) was awarded the contract to construct a new LNG Jetty as part of Woodside’s Pluto LNG Project on the Burrup Peninsular, Western Australia. This A$200m contract involved the construction of a LNG berth and related infrastructure for the handling of Q-Flex LNG carriers and 120,000 dwt condensate tankers. Despite being located in an area frequently visited by cyclones, HCJV delivered the project on schedule, within budget and with an excellence safety record.

Key project components included:

• A ten-span 300 metre long approach trestle and abutment

• Four breasting dolphins and six mooring dolphins connected by nine catwalks with a length of up to 52 metres

• Installation of four pre-assembled manifold units up to 150 ton and six loading arms supplied by the client

• Five piled channel markers and leads and 15 buoys

• Construction of a load-out facility and upgrade and reinforcement of a material offloading facility for landing the Pluto train modules.

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Key Aspects

9 Self Performed

9 Project site in cyclone area

Project Highlights

9 Excellent Safety Performance

9 Project completed on schedule

9 Added scope to construct the load out facility and to reinforce existing material offloading facility.

9 Crane installed on breasting dolphin for sea condition independent craneage.

9 Prefabricated concrete structures reduced labour installation requirements.

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The LNG Jetty extends from the onshore facilities via an access trestle to a loading platform. The trestle consists of seven two-pile bends and one four-pile anchor bent, one onshore bent and an abutment. The loading platform is fitted out with a 50 metre x 39 metre concrete main deck which supports a steel-framed concrete upper deck and roadway. The substructure is made of in-situ concrete-filled pre-cast pile caps and trough headstock beams on 34 tubular steel piles. Pre-cast deck slabs and in-situ concrete topping complete the deck.

The four breasting dolphins have five piles and the six mooring dolphins feature four piles each.

During construction a tower crane was installed on a breasting dolphin to assist with temporary works, pre-cast and other construction activities.

For the piling and drilling, custom built hydraulically operated piling templates were designed and constructed, to withstand the force of the large hydraulic piling hammer [IHC 280S] and the reversed circulation drill on the piles. To maintain the schedule, HCJV performed pile drilling during the night shift utilising “Down the Hole” drilling techniques.

The 30 metre long access trestle units, fitted with piping, were fabricated off site in Thailand at the client’s module fabrication yard and transported to the site. These 140 tonne modules were installed by the IB909 Jack up barge.