dredging and reclamation

Dredging & ReclamationStatement of expertise

Dredging & Reclamation

Dredging & Reclamation Contents 1

Our approach 2 Dredging works 3 Reclamation works 4 Our experts 5 Our projects 6

Contents


Dredging & Reclamation Our approach 2

The need to balance budgetary constraints vis-a-vis the urgency for completion means that port developers and operators require smart and innovative solutions on their projects, without compromising efficiency or environmental impact issues.

Hence Aurecon starts every project by first understanding the needs and challenges of our clients. We then translate these into functional requirements to be supported by our innovative and experienced staff from our geotechnical, coastal, environmental and ports teams, who collaborate to deliver complete solutions.

Clients will benefit from our clear and concise translation of requirements into complete solutions, backed by complete technical documentation and superior project management. So whether it is a reclamation project or preparations for dredging a port access channel, Aurecons purpose is to develop clarity, confidence and surety in the path to be pursued and define the outcomes and their potential impact.

Aurecon has provided ports and coastal and coastal consulting services since the 1950s. We offer globally recognised capabilities associated with port and coastal works, from front-end studies through to engineering, procurement and construction management (EPCM) delivery for transportation chains, especially around inter-modal hubs. We bring award-winning experience and insight and a Zero Harm approach, ensuring that our clients multiple needs are met.

Our approach

Despite the fast- track delivery schedule we requested, and the volatility of the construction industry at the time, the exceptional commitment of the Aurecon design team, together with the contracting strategy adopted, ensured that the [Abbot Point Coal Terminal] X50 expansion was completed to a high quality, within budget and on schedule." - Brad Fish, Chief Executive Officer,

North Queensland Bulk Ports


Dredging & Reclamation Dredging works 3

The key to effective planning for dredging works is to identify the type and size of available plant that will be most suitable for the job, given the project parameters and environmental constraints. In this respect, Aurecons experts will balance the various elements for the best possible outcome for the clients dredging project. Our expertise includes:

Analysis of material being dredged: its physical and chemical properties, the ease of removal

Investigation of dredging and spoil sites: exposure of sites to environmental conditions and long-term stability, particularly for channels and port basins.

Intimate working knowledge of different dredging plants: availability and production rates, environmental impact, and limitations.

Effective contract documentation management

Stakeholder engagement: development of strategy for managing on-time inspections and obtaining approvals

.

Environmental impact studies Dispersion plume modelling

including: o Dispersion modelling o Sediment transport

modelling o Assessment of turbidity of

tail water

o Hydrodynamic modelling of tidal, wind and wave circulations

o Water quality modelling o Computational fluid

dynamics o Physical testing and wave

tank studies

Dredging works

Dalrymple Bay Coal Terminal, Australia

Aurecon understands the potential environmental impact and the importance of developing management plans to mitigate them. This is a prerequisite to obtaining the necessary permits for works and abiding by the conditions imposed with the approvals. Hence, the framing of a contract and the specifications for its execution are crucial for the successful and on-time delivery.


Dredging & Reclamation Reclamation works 4

As a global market leader in the design, construction, maintenance, and upgrading of ports and coastal infrastructure, Aurecon tailors multi-disciplinary solutions that provide operational efficiency and flexibility throughout the entire project life-cycle. Our expertise includes:

Project phasing, especially for large sites

Design and stability of permanent or temporary bunds

Geotechnical designs including design of soil improvement and settlement predictions

Design of shore protection Storm and cyclone modelling Hydraulic interaction studies Wave transformation studies Sediment transport studies Plume and dispersion modelling Design of (temporary) access and

drainage of the site Impact analysis on environment

and neighbouring facilities Risk assessments

Expert knowledge of compaction techniques and equipment available

Even as capital costs of projects increases and as high-quality barrow areas become increasingly scarce, a desire to use excavated or other surplus material where possible will also increase environmental concerns and time pressure on projects. In this area, clients will be well-served by Aurecons high-quality advice and innovative solutions to ensure effective and efficient use of capital funds.

Reclamation works

Darwin City Waterfront Redevelopment, Australia


Dredging & Reclamation Our experts 5

Dr. Eduard Vorster Competency Leader, Ground Engineering Dr Eduard Vorster joined Africon (now Aurecon) in 1998. In 2002 Eduard won a Cambridge-MIT Institute Scholarship to complete his PhD in Geotechnical Engineering at the University of Cambridge (United Kingdom), conducting research on soil-structure interaction on the Cambridge Beam Centrifuge. The PhD was awarded the prestigious Prix de Mecanique des Sols Jacques Verdeyen, an international award made every 4 years to outstanding research in the field of soil mechanics, as well as the Cambridge University Turner Prize for innovative and significant contributions to work on the Cambridge Beam Centrifuge.

Warren Dou Technical Director Aurecons Geotechnical Leader with 26 years practical experience in the field of geotechnical engineering, deep excavation and underground structures, civil engineering, foundations, marine facilities, and earthquake engineering including geotechnical investigation, analysis, design, construction supervision and project management in areas of deep excavation & support systems, tunnels, earthworks, site formations, foundations, ground improvement, and reclamation for projects ranging from railways, highways, bridges, tunnels, marine structures to building developments in Hong Kong, China, Asia Pacific, and North America.

Dr. Weimin Deng Associate Dr. Weimin Deng has 23 years ground engineering design & consulting experience involving a wide variety of large infrastructure projects in Australia, East Asia and the Middle East. He has undertaken geotechnical appraisal, design and construction supervision in a variety of soil and rock conditions including very soft marine soils and karstic limestones. He has extensive detailed design and site experience of the construction of braced excavations, tunnels, deep foundation systems such as piled rafts, retaining structures and embankments on soft soils.

Our experts

Aurecon has a number of experts including:


Dredging & Reclamation Our projects 6

Abbot Point, Australia

Our expertise and industry knowledge have been built on projects around the globe, allowing our teams to develop detailed localised knowledge of the 80-plus countries in which we have worked.

The following pages showcase a small sample of our expertise in dredging and reclamation projects.

Our projects



NCIG Coal Export Terminal 3 The NCIG Coal Export Terminal 3 project included a dredging and reclamation programme in the South Arm of the Hunter River that was both substantial and technically challenging.

Client Newcastle Coal Infrastructure Group (NCIG)

Large Cutter Suction Dredge at NCIG CET3 project

The dredging material consisted of soft river sediments overlying contaminated lenses (opposite the old BHP Steelworks), overlying stiff clays, weathered rock and hard-to-very-hard siltstone. In addition to the technical and environmental complexities, the project was also carried out on behalf of three separate companies:

NCIG: approximately 5 million cubic metres opposite the new K8 and K9 berths

PWCS: approximately 1 million cubic metres opposite their proposed K7 berth

BHPB: approximately 1 million cubic metres of clean and contaminated materials

Solution A total of 10 different dredgers were used on the project at different times including 3 cutter suction, 4 backhoes, 2 trailing arm hoppers, and 1 grab dredges. In addition, specialist environmental buckets were manufactured for the contamination work that was done for BHPB.

The dredging was completed on time, providing sufficient suitable fill material for the site reclamation programme, access to the berth pocket for berth construction and ultimately access to allow the first vessels in to the berths for loading of coal. All of this was completed within the contingency funds that had been set aside for the dredging works.

Over 1 million man-hours were involved in the dredging works with zero lost time injuries.

Country of execution Australia State/Province Newcastle

Services EPCM

Completion 2010

Awards 2010 Australian Bulk Handling Awards, Bulk Handling Facility of the Year 2010 Engineers Australia Newcastle Division Highly Commended WorkCover NSW Leadership in Safety Award 2010



Dynamic replacement ground improvement at NCIG CET3 project

Benefits The feasibility study and initial plans were based on preloading of the site but due to programme and the shortage of available sands from dredging, an innovative dynamic replacement ground improvement method was put into place. This saved 6 to 9 months in the project schedule and was completed for approximately the same cost as preloading. The project was the largest dynamic replacement project ever carried out in the Southern Hemisphere and was a truly novel solution to a significant challenge.

The NCIG site posed many geotechnical challenges due to the location and the historical use of the land. Numerous advanced geotechnical design and construction techniques were used to resolve issues of contamination, ground water and settlement. A full range of special ground improvement construction methods were employed to address the demanding and variable site conditions including:

Dynamic Replacement

Deep Soil Mixing

Preloading

Diaphragm walls

Wick Drains

Soil conditioning with a pulveriser

Impact rolling



Hong Kong-Zhuhai-Macao Bridge (HZMB) HY201103 The Hong Kong Link Road (HKLR) connects the main Hong Kong-Zhuhai-Macao Bridge (HZMB) at the Hong Kong Special Administrative Region (HKSAR) boundary, and the Hong Kong Boundary Crossing Facilities (HKBCF) located at the north-eastern waters of the Hong Kong International Airport (HKIA).

Client Leighton/Dragados/Kaden Joint Venture (JV)

Hong Kong-Zhuhai- Macao Bridge (Artists impression) Solution Aurecon provided consultancy services for the tender submission, which covered the electrical and mechanical works for the tunnels, viaduct, at-grade road and road works, tunnel buildings, and a highway operation and maintenance area. Building services systems included a Ventilation, Heating and Air Conditioning (HVAC) system, fire protection, plumbing and drainage, power supply, lighting, and lift and hoisting equipment.

The scope of works included:

the design and construction of a 23ha reclamation along the coast of the Hong Kong International Airport (HKIA)

a tunnel (Tunnel SHT) from Scenic Hill to the reclamation

an abutment of the viaduct portion of the Hong Kong Link Road (HKLR) at the west portal of Tunnel SHT and associated road works

an at-grade road on the reclamation along coast of the HKIA

road links between the Hong Kong Boundary Crossing Facility (HKBCF) and the HKIA

a highway operation and maintenance area located on the new reclamation south of the Dragon Air Headquarters Building

associated civil, structural, building, geotechnical, marine, environmental protection, landscaping, drainage and sewerage, etc.

Country of execution Hong Kong State/Province

Services Preliminary design of Mechanical, Electrical and Plumbing (MEP) system Detailed design of MEP system

Capital Value USD 132,284

Completion Dec 2011



Dawei Deep Sea Port Development Italian-Thai Development Public Company Limited (ITD) retained the planning and engineering services of the Halcrow-Aurecon Consortium (H-A) to prepare, for this major Greenfield project, a Masterplan, Conceptual Design, Preliminary Design, Definitive Design, and Final Design of the Dawei Sea Port (DSP) that is part of the Dawei Industrial Estate development in Myanmar. This project includes dry and liquid bulk, container and general cargo terminals.

Client Italian - Thai Development PCL

Dawei Sea Port rendering

The Dawei Sea Port will support the industrial estate and help create a new market for foreign investment by increasing demand and traffic to the region. This increase in demand and traffic will enable the port to serve as a new commercial gateway providing an alternative sea route to India, Middle East, Europe, and Africa.

The objective of this Dawei Sea Port Master Plan is to identify the optimal port configuration that would serve the Dawei Development Project for the next 70 years and to plot the path to be followed for design, construction, operation, and maintenance of the proposed port.

Solution The design scope includes the port-wide facilities: All aspects of overall port planning

Management and supervision of geotechnical investigation

Sediment transport study for dredging assessment and shoreline evolution assessment

Design option studies for quaywalls and pavements

Preliminary, definitive and final design for:

Dredging / Port basin earthworks

Quay walls and foundations

Breakwaters / revetments

Wharf apron (50m from quaywall)

Country of execution Myanmar (Burma) State/Province Dawei

Services Port Masterplaning (Dry / Liquid Bulk, Container and General Cargo Terminals) Market studies Coastal engineering Preliminary, prefinal and final designs Port shipping access (channel, manoeuvring areas) Electrical and IT / Communications Geotechnical

Capital Value USD 6,687,117

Completion Dec 2012



Port administration complex

Tug base/small craft facility

Specifications for the Port Management Systems

Review of the port operations and maintenance report

The proposed port construction includes the dredging of the approach channel, the inner and outer harbours as well as the construction of 2 large breakwaters.



Paradip Port, Western Dock Paradip Ports 20-year business plan predicts that traffic through the port will grow beyond current expansion plans. The port is presently comprised of 14 berths; with a further five berths in development. To cater for anticipated traffic growth, the Paradip Port Trust (PPT) intended to add another dock to the west of the existing docks.

Client Paradip Port Trust

Paradip Port

Solution Paradip Port Trust commissioned Aurecon to prepare a MasterPlan and detailed project report for the development of the additional dock. This entailed a trade assessment of Western Dock for a 30-year period, a topographic survey, geotechnical investigation, development options, and master planning.

Aurecon undertook planning, design costing and financial feasibility for iron ore export terminal, with a capacity of 30 million tonnes per annum (Mtpa), as well as coal export (25Mtpa) and coal import terminals (20Mtpa).Aurecon also provided a dredging assessment and methodology, and a financial feasibility assessment and costing for the development of each terminal.

Benefits A non-conventional dock layout, eliminating the need for a second swinging basin, and 20-metre high stockpiles were recommended due to the tight land constraints. Dry excavation was suggested in place of dredging as it is a more cost-effective option and because it enables the reuse of excavated material. PPT was provided with a master plan and detailed report to ensure that the ports growth predictions can be accommodated. With increase in global demand for resources, the port and its controlling entity can be confident there are sufficient capital resources for any eventuality.

Country of execution India State/Province

Services Survey & Investigations, Port Planning, Design and Feasibility Study Services


Completion Dec 2010



Abbot Point Multi-Purpose Port Concept Plan The Queensland Government proposed the development of a new industrial precinct along the Queensland East Coast at Bowen, involving a significant expansion of the regional infrastructure.

Client Ports Corporation of Queensland

Abbot Point Coal Terminal 5

Ports Corporation of Queensland commissioned Aurecon to propose a vision for the development of a multi-purpose port at Abbot Point. This included the study of marine parameters and port master planning.

Aurecon reviewed the regional and local coastal processes including wind, wave, water level and sediment transport.

Various port options and locations were proposed and material quantities (dredging, reclamation area, revetment protection etc.) were compared. A SWAN wave model was undertaken to estimate wave heights for the various options, which allowed concept design of the revetments for each option

Country of execution Australia State/Province Bowen, Queensland Services Coastal engineering and masterplanning

Completion Dec 2007



Hay Point Coal Terminal Expansion HPX3 Prefeasibility Study BHP Billiton Mitsubishi Alliance (BMA) Hay Point Services is investigating a third expansion phase (HPX3) to lift the capacity of the Hay Point Coal Terminal. Aurecon Hatch was awarded the prefeasibility study for HPX3, following its EPCM services for the HPX1 and HPX2 expansion phases, and successful presentation of the Hay Point Coal Terminal Development Plan to BMA in 2005.

Client BHP Billiton Mitsubishi Alliance

Hay Point Coal Terminal

Solution Hay Point Coal Terminal (HPCT), located 38 km south of Mackay, is one of Australias largest and most efficient coal receival and export facilities. BMA engaged Aurecon Hatch to undertake the prefeasibility study for the third phase of the terminals expansion. HPX3 involves the construction of a third offshore berth and shiploader, and the upgrading/expansion of the outloading conveyor systems to suit this new infrastructure.

The scope of Aurecon Hatch services for the study can be divided into six main categories, each of which is necessary to support the expansion of HPCT:

health, safety, environment and community

dredging for Berths 1, 2 and 3

capacity assessment

infrastructure development

risk assessment

capital costs

Two preferred alternate development options for HPX3 were identified, each with comparatively different risk and capital cost profiles, with the final preferred outcome to be determined by overall BMA business and marketing objectives.

Country of execution Australia State/Province Queensland Services Prefeasibility study

Completion Dec 2006



Significant issues requiring close scrutiny as part of the study included:

determining the preferred location of the third berth

assessing the impact of high level (and surface) seabed rock on dredging and berth construction

environmental approvals covering State and Federal jurisdictions, as well as the Great Barrier Reef Marine Park Authority

developing the new infrastructure to tie into the existing without causing major disruption to terminal throughput as part of the expansion



Wiggins Island Coal Terminal To accommodate the State's continued coal industry expansion, the Wiggins Island Coal Export Terminal (WICET) will be the second major coal export facility in Gladstone, and the first built in Queensland in 20 years. Located north-west of Gladstone and just north of the existing RG Tanna Coal Terminal, the Wiggins Island Coal Export Terminal will increase Queensland's coal export capacity to around 70 million tonnes per annum (Mtpa). Stage 1 has a projected throughput of 27 Mtpa.

Client Gladstone Ports Corporation (GPC)

Wiggins Island Coal Terminal

Solution The Aurecon Hatch Joint Venture was commissioned to provide engineering design and environmental services for the proposed terminal and associated rail infrastructure in Gladstone by the Gladstone Ports Corporation (GPC) and Queensland Rail (QR).

Aurecon Hatch assisted in establishing the overall development concepts for the coal terminal, rail system and supporting infrastructure. A variety of stockyard options was developed and indicative whole-of-life cost estimates prepared as well as the detailed design for Stage 1, including a dump station, overland conveyor, stockyard approach jetty and ship loading stream servicing a single berth.

The Aurecon Hatch environmental team provided a range of services, including the referral of a State significant project and a controlled action under the Environment Protection and Biodiversity Conservation Act (1999) for which we prepared an Environmental Impact Statement (EIS).

As part of this a range of studies, including terrestrial, vegetation, fauna and aquatic ecology surveys; land use planning, social impact, water quality, cultural heritage, economic impact and soils assessments were conducted. We achieved a range of Commonwealth and State Environmental Approvals and prepared environmental management plans necessary for construction.

Country of execution Australia State/Province Queensland Services Preliminary engineering and Environmental Impact Statement (EIS) Capital Value AUD 1,500,000,000

Completion Dec 2012



Benefits The project was granted conditional State and Commonwealth approval in early 2008 for the staged construction and operation of a coal export terminal, with an ultimate export capacity of up to 84 Mtpa. Construction of Stage 1 commenced in 2011.



Saadiyat Island Fishing Port, Abu Dhabi Project management services for design and supervision of a new fishing port in Saadiyat Island, Abu Dhabi.

Client ADHC - Abu Dhabi Centre for Housing & Services Facilities Department

Fishing port, Saadiyat Island

Solution Abu Dhabis then-existing fishing port was over 40 years old. Its structures are deteriorating; and it didnt have the capacity to support the regions rapid growth in population and accompanying increase in the demand for marine services.

Initiated in September 2009, the projects maritime works involved reclamation of 43 000 m of land, as well as a quay wall. The 776 m and 18 m deep wall around the port is now complete, and has set an industry precedent in innovative precast technology in the region.

Because there was only 5 m between where the wall needed to be constructed and the sea, bringing the water level down so that precast panels could be attached to the wall was a major safety risk as it would require the use of heavy duty equipment over a prolonged period of time. Added to this, using such heavy equipment so close to the sea edge would be both expensive, and risky.

Aurecon, who provided project management, design management and construction supervision for the project, worked together with contractors Soletanche Bachy Dubai to develop a novel way around this problem. The contractor recommended fitting the precast panels to the wall panels prior to the construction phase, and not as a retrofit. Accordingly, the construction of the wall and fitting of decorative panels became what is essentially a one-step process and negated the need for excavations.

Aurecons careful review of this design found that the process was indeed viable if the regular gap was left between each precast panel and wall panel. The off-site casting yard for the panels was carefully monitored by Aurecon as the project required very strict tolerances, as well as careful installation supervision.

Benefits This innovation made it possible to deliver a great wall design with

Country of execution United Arab Emirates State/Province

Services Project management Design Supervision

Completion Apr 2011



aesthetically pleasing cladding whereas, using conventional methods, it would have been impossible to do so, given the lack of space. This process not only overcame safety challenges, but ensured massive savings on both time and money - about 20 million Dirhams, Whats more, its the first time this innovation has been used in this region, and as such, a patent will soon be launched on the system.

More importantly, the innovation has vast scaling-up potential. Apart from quay walls, use of the innovation can also be applied to include excavations requiring the fitting of patterned or non-patterned facings to facades, such as car parks, cut and cover tunnels etc.

The ports impact on local fishermen will be significant. It will ensure that they can work more efficiently in terms of an easier, more direct passage out to sea, as well as ensure that fish can be brought back from sea quickly with no delays.

Added to this, the port is also billed to benefit local tourism once complete, serving as an attractive stopover site for visitors.

Construction of the ports accompanying infrastructure and superstructure, including drainage systems, a fishermans hostel to accommodate approximately 1, 400 fishermen, admin offices, fish market, cleaning facility, block and crushed ice factory, outdoor and indoor auction area, as well as ship maintenance yard, is set for completion by the end of 2013.



Newcastle Coal Export Terminal 3 The Newcastle Coal Infrastructure Group (NCIG) Coal Export Terminal is a greenfield terminal being constructed in stages on Kooragang Island, Newcastle. Stage 1 has been operating since May 2010 and was the largest single stage development of a new coal terminal in the world. When completed, the combined export capacity of the Port of Newcastles terminals will exceed 200 million tonnes per annum (Mtpa), with further expansion proposed.

Client Newcastle Coal Infrastructure Group Pty Ltd

Coal stackers by the Hunter River

Solution The Aurecon Hatch joint venture delivered the concept study, prefeasibility and feasibility studies and EPCM services for the Stage 1 development including design and engineering, Preparation of detailed scope of work descriptions, capital cost estimations, and project implementation programmes, Specialist studies (including geotechnical investigations, dredging and fill materials management, transport logistics modelling and ship berthing modeling) and preparation of technical specifications and commercial documentation for tendering of all significant plant and equipment and tender assessments.

The project required a new administration building and rail loop to the existing rail network. The loop included a rail dump station and conveyor system that transfers coal to three stockyards equipped with two stacker/ reclaimers running along a 1.2 kilometre track. These machines reclaimed the coal and transferred it onto outbound conveyors that feed onto the travelling ship loader.

Benefits Constructed with steel tubular piles and a skeletal deck structure the berths support the ship loader, fenders, mooring hooks and a single lane roadway. Berth construction saw a massive 6 million cubic metres of material dredged from the Hunter River, with 2.5 million cubic metres used for site reclamation.

The Stage 1 development achieved the planned terminal capacity of 30 Mtpa, greatly increasing the end users ability to export coal through the port. The entire out-loading system is operated from the ship loader using a purpose-built control system.

Country of execution Australia State/Province New South Wales (NSW) Services Engineering, procurement and construction management

Capital Value USD 2,870,100,000

Completion Dec 2012

Awards 2010 Bulk Handling Facility of the Year - Australian Bulk Handling Magazine Engineering Excellence Awards Highly Commended International Bulk Journal Awards Shortlisted 2011 Gold Award - Project Management - Consult Australia



Western Basin Dredging and Disposal Dredge Management Plan The Western Basin Strategic Dredging and Disposal Project will facilitate the provision of additional land to support the ongoing expansion and construction of various port facilities with the Port of Gladstone.

Client Gladstone Ports Corporation Ltd (GPC)

Gladstone Harbour

Solution Aurecon prepared and obtained the necessary post-EIS environmental approvals associated with the Western Basin Dredging and Disposal Project, Gladstone. This is a current example of Aurecons ongoing experience with coastal development and post-EIS approvals within Gladstone, and our ongoing relationship with GPC.

Aurecon prepared the Western Basin Project DMP for the onshore and offshore disposal of 25 Mm3 of dredge material. The DMP was prepared to address the Commonwealth-controlled action conditions, Coordinator-Generals Report conditions, the Coastal Protection and Management Act 1995, Environmental Protection Regulation 2008 (i.e. ERA16), and Fisheries Act 1994 (marine plant/ sea grass removal). Benefits Aurecon obtained the necessary dredging and disposal approvals within an extremely tight timeframe to allow dredging to occur within the LNG proponents timeframes for construction.

Aurecon has also prepared numerous DMP amendments to address LNG proponents changing construction requirements. Aurecon obtained Commonwealth and State Government approvals for these DMP amendments.

Country of execution Australia State/Province Queensland (QLD) Services Environmental Approvals


Completion Mar 2012



Clinton Bypass Channel Investigation Aurecon was invited along with J&S Drilling to conduct an offshore drilling investigation along the current Clinton Bypass in Gladstone QLD. The bypass channel is planned to be deepened from the current depth of -13.0mLAT to -16.5mLAT. In addition to the initial program, Aurecon was also invited to act as the client's representative during a supplementary drilling program conducted by the dredging contractor JV VODI.

Client Gladstone Ports Corporation Ltd (GPC)

Jack-up barge used for the Clinton Bypass Geotechnical Investigation seen adjacent to RG Tanna Wharf Solution Deepening of the Clinton Bypass Channel is required to allow larger vessels to pass through the harbour while ships are docked at the current RG Tanna coal facility. Currently the depth of the channel does not allow for large ships to pass through so as to bypass the RG Tanna facility. Deepening of the channel will allow ships accessing the LNG facilities on Curtis Island and The Wiggins Island Coal Terminal to pass through the harbour without affecting ships at berth at RG Tanna

Benefits The Clinton Bypass investigation has helped to add to Aurecon's knowledge of the subsurface conditions throughout Gladstone Harbour. The client GPC came to Aurecon due to our expertise in the harbour, and our knowledge of the information was needed for a large dredging program in the area.

Country of execution Australia State/Province Queensland (QLD) Services Offshore geotechnical drilling and logging


Completion Mar 2013



Western Basin Project - Clinton Bypass Deepening Aurecon was commissioned to undertake geotechnical and geochemical sediment sampling within the Clinton Bypass Channel.

Client Gladstone Ports Corporation Ltd

GIS Mapping

Solution Aurecon has been involved with the Western Basin Dredge and Disposal Project since May 2010. Due to design changes in the Clinton Bypass Channel Dredge Phase, this area is required to be dredged deeper than originally proposed. Additional sediment testing was therefore required in this phase to determine the geochemical and physical characteristics of the material to be dredged, in accordance with the National Assessment Guidelines for Dredging (NAGD) (2009). The tasks undertaken as part of the additional sediment sampling and analysis works included the following:

Design of targeted sampling locations

Offshore vibracoring within the Clinton Bypass Channel and logging of sediment cores

Environmental sampling of sediments for laboratory analysis in accordance with the NAGD (2009)

Report on the geochemical and geotechnical characteristics of the sediments

Provide advice on the suitability of the material for offshore disposal in accordance with the NAGD (2009)

Benefits Aurecon prepared a Sea Dumping Act Permit amendment to allow 2.5 Mm3 of dredge material to be disposed offshore within the East Banks Sea Disposal Site. Aurecon also assisted GPC to negotiate with SEWPaC to change the controlled action condition from 25Mm3 to 27 Mm3.

Country of execution Australia State/Province Queensland (QLD) Services Geochemical, Environmental approvals and management


Completion Jul 2013



LaemChabang Revetment Failure Investigation Aurecon was engaged to investigate the failure of a revetment below Terminal A0 wharf structure at LaemChabang container terminal. LaemChabang Terminal A0 includes an open piled wharf with a slope revetment and wharf structure constructed in the dry in 2006.

Client LCB Container Terminal 1 Ltd

Caption

Solution A dredging contractor was performing maintenance dredging when they encountered rocks on the seabed. A bathymetric survey was undertaken and revealed a rock mound at the toe of revetment. In addition, a diver performed an underwater inspection of the revetment and noted rock slippage, presence of sand/clay material on the slope and exposure of geotextile at some locations. Aurecon was appointed to investigate the revetment failure and carried out the following tasks:

Reviewing the original rock slope design

Determining the likely cause of the failure

Wave related damage

Propeller and bow thruster related damage

Slope failure

Construction issues

Assessing potential for damage to the concrete piles from the revetment slippage

Recommending remedial works to repair the revetment

Aurecon suggested that dredging operations and wave action were probably not critical causes of the rock slippage. However there was a high probability that propeller and bow thruster wash as well as geotextile

Country of execution Thailand State/Province LaemChabang

Services Coastal engineering


Completion Dec 2009



installation procedures were critical sources of the failure of the revetment.

Contact us Aurecon Singapore (Pte.) Ltd. 152 Beach Road, #22-02 Gateway East Singapore 189721

T +65 6256 6188 F +65 6251 7188 W www.aurecongroup.com

Jeroen Overbeek Ports & Marine Leader, Asia T + 65 6412 9411 E [email protected]

John Webb Buildings Leader, Asia T + +852 3664 6714 E [email protected]

Grace Arguelles Development Manager, Aurecon T + 63 2 470 9999 E [email protected]