Dredging & Reclamation

Shipping lines are progressively increasing vessel sizes in order to improve efficiency. This calls for greater water depth in ports. The trade will go elsewhere if facilities are not provided to welcome bigger vessels.

Types of material are critical to the cost of dredging because different techniques and equipment will be needed. The cost of removing rock is substantially greater than the dredging of sand.

Properly supervised hydrographic surveying is crucial to ensure that the correct water depth is provided and that the contractor is paid correctly for his work.

Environmental issues have to be considered in advance of dredging and proper planning must be put in place to ensure that adequate mitigation measures are followed. Re-use of dredge spoil for land reclamation is often considered to be beneficial.

Port & Harbour Layouts
Berths, Quays & Jetties
Piers
Breakwaters
Waterfront Walls & Structures
Dredging & Reclamation
Pontoons & Floating Structures

Krishnapatnam Port Masterplan, India

The State of Andhra Pradesh is developing more quickly than most other states in India. The existing minor port at Krishnapatnam is to be expanded to accommodate panamax coal carriers principally for delivery of coal for power generation. This is a BOT project. Large quantities of iron ore can also be exported from the hinterland.

Beckett Rankine is working as part of the sponsoring organisation and has been instrumental in preparing plans for a phased development of the port to match the anticipated cargo volumes and revenues. These plans have been passed by bankers as financeable.

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Hainan Hohbond Oil Refinery, China

A new refinery is to be constructed and a new harbour is needed for oil tankers serving the refinery. This includes berths for vessels ranging in size from 500 dwt to 60,000 dwt within the protection of a new breakwater. Also a single point mooring for crude carriers up to 350,000 dwt. Provision of a new dredged channel and navigation aids.

Beckett Rankine reviewed previous designs prepared by UK and Chinese companies and restructured the harbour layout to meet new operational requirements. Focus was on cutting costs and satisfying local and international standards. This included a FEED of the marine facilities.

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Ras Laffan Masterplan

 The current development of Ras Laffan will make it one of the largest LNG ports in the world. The expansion will involve 20km of breakwaters and 15m cubic metres of dredging to accomodate over 30 ship berths. This was required because of the dramatic rise in the export of LNG and other gas products from Qatar.

Beckett Rankine were responsible for preparing a Masterplan to cover the entirity of the construction of the port. This included selection of an appropriate site, and have used various hydrodynamic model studies to consider the waves, currents and siltation as well as vessel simulation.

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Kerala Backwaters

The Parvathy-Puthanar Canal in Kerala is fed by small streams and sewers. The untreated waste in the canal makes it dangerous to health and it is non-navigable due to a build-up of weeds and debris. A solution to these problems was required to make full use of the oppurtunity to attract tourists to this potentially appealing area.

Beckett Rankine studied the problem and proposed reconnecting the canal to the sea through the river system. This would flush out the silt that dries out in the summer and clogs it up. Mechanichal aeration could also be used to help purify the water, so the canal can be used safely.

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Oil Platform Construction Dock

A feasability study with cost estimate was required by the client for a graving dock that would be suitable for construction of an offshore concrete gravity platform. Possible locations were to be considered with a focus on the Middle East, particularly the UAE, due to its strategic location and rich oil supplies.

Beckett Rankine considered the feasibility of the scheme with a focus on access to the open sea and geotechnical conditions. An assessment was made of the main construction elements and likely volumes, with cost rates for these elements obtained from current UAE construction projects.

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Ibeto Cement Terminal

A swampy low lying area just downstream of Port Harcourt in Nigeria has been chosen as the site for a new cement unloading terminal with a projected throughput of 600,000 tonnes/year. Good marine and land access near the site make it an ideal place for this industrial development by Ibeto Industries Ltd.

Beckett Rankine has entered into a joint venture with Allott (Nigeria) Ltd for the planning, design and supervision of the marine and land works. These comprise initial investigations, dredging/reclamation, site layout, planning and design of marine works and heavy foundations.

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