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Trench dredging gas pipeline, Nord Stream

The Nord Stream gas pipeline project is a joint project of four major companies: Gazprom, BASF/Wintershall, E.ON Ruhrgas and Gasunie. The project is more than just a pipeline. It is a new channel for Russian natural gas exports and a major infrastructure project which is expected to set a new benchmark in EU-Russia cooperation. In view of current developments the new pipeline will be an important factor of energy security in Europe.

Nord Stream consists out of two 1,220 kilometers sub-sea gas pipelines from Russia to Northern Germany through the Baltic Sea and will transport natural gas to supply both businesses and private households. The first pipeline is due for completion in 2011. The second line is due to be completed in 2012. Boskalis Offshore, partner within the Joint Venture Boskalis Offshore-Tideway, will prepare the seabed (by means of subsea rock installation) for the laying of the pipelines over the full distance of the Nord Stream pipeline route. Boskalis Offshore also executes the shore approach of the pipelines in Germany. The contract for the preparation of the seabed for the 1,220 kilometers pipelines requires the construction of rock beds and berms using rocks to level the seabed and to provide on-bottom stability for both pipelines. Subsea rock installation will be executed by the nominated Dynamically Positioned Fallpipe Vessels Seahorse, Sandpiper and Rollingstone. The project will be executed in a 50/50 partnership with Tideway. The contract for the shore approach for the pipelines in Germany requires dredging of a trench for the pipelines, pipe-pulls over a distance of approximately 1.4 kilometers and the backfilling of the dredged trench. A 700 meters cofferdam will be constructed at the landfall to facilitate the pipe-pulls. The shore approach will be executed in a 50/50 partnership with Rohde Nielsen A/S.

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Installation gas pipeline, Balgzand-Bacton

BBL Company was established to design, construct, operate and exploit the Balgzand-Bacton Pipeline (BBL) for the transmission of natural gas from Balgzand, the Netherlands to Bacton in the United Kingdom. The overall length of the 36" offshore pipeline is some 230 kilometers. The capacity is around 42 million m3 of gas a day. As part of the pipeline installation, Saipem UK Ltd awarded Boskalis Offshore the contracts for the shore approaches at Julianadorp, the Netherlands and Bacton in the United Kingdom and the presweeping and rock dumping works along the pipeline route on the North Sea.

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Platform installation,
De Ruyter field

The De Ruyter field, discovered in 1996, straddles Blocks P10a and P11b in the North Sea, which are both operated by Petro-Canada. The development consists of a Gravity Base Structure (GBS) with wellhead and lattice towers supporting an Integrated Production Deck (IPD). De Ruyter joins Hanze as Petro-Canada’s second operated offshore field in the Dutch North Sea. Heerema Zwijndrecht was awarded the fabrication, installation and hook-up of the GBS and IPD. The transportation, installation and stabilisation of the GBS was subcontracted to a consortium between Smit Marine Projects and Boskalis Offshore.

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Bridge construction, Stralsund

SMIT’s 1,200 tonnes sheerlegs Taklift 7 completed a major German bridge building programme during 2006. The sheerlegs had spent several months at the new Stralsund Bridge, on the German Baltic coast. This suspension bridge links the mainland with the island of Rügen.

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Pipeline construction, Mumbai Highfields to Uran Trunkline

The Mumbai High Fields to Uran Trunkline Project is situated near Mumbai (Bombay) in India. ONGC Ltd (Oil & Natural Gas Corporation) has constructed two new pipeline connections from the Mumbai High Fields to Uran over a total length of 204 kilometers. These new pipelines have been constructed in order to replace the existing Bombay High Fields to Uran Trunkline, which had already completed more than 25 years of successful operation and had surpassed its design life. The new pipelines are a 30" oil pipeline and a 28" gas pipeline.

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Construction gas pipeline
Beachfield Upstream
Development

The BUD project entailed the construction of a 66 kilometer, 36" gas pipeline, 63 kilometers offshore and 3 kilometers onshore underground to the treatment facilities. The offshore pipeline runs from the east coast at Beachfield (Rustville), Guayaguayare, to the 'Cassia B' platform complex. At the NGC Abyssinia facilities, 3 kilometers off Beachfield, a new sludge catcher has been developed to separate the liquid or condensate from the natural gas. The condensate is separated from water and metered. The station is also designed to control the pressure of gas, as it enters into the land gas transmission system. NGC's existing 30" and 24" gas pipelines have also been diverted to the new Abyssinia sludge catcher.

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Seabed preparations, Changi Outfall

The Public Utilities Board implemented the Deep Tunnel Sewerage System as a long-term solution to meet the needs for sewerage water collection, treatment and disposal to help maintain Singapore’s clean and healthy environment. In phase one of the Deep Tunnel Sewerage System, the Changi Water Reclamation Plant was constructed in the east of Singapore, from which the Changi Outfall was subsequently constructed. Treated effluent from the water treatment plant will flow through outfall pipelines and be discharged through series of diffusers, dispersing the effluent in the seawater. Boskalis International was awarded the contract for the Changi Outfall in 2002 and formed a joint venture with Archirodon to construct the project.