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Dredging and reclamation, Port of Peterhead

The project consisted of capital dredging, reclamation, quay construction and breakwater extension works for Peterhead Smith Embankment Development, in order to develop the area in the north of the harbour at Smith Embankment to provide sheltered berths for vessels ranging from 20 to 160 m in length.

The project was awarded to a Joint Venture between Westminster Dredging and R J McLeod, a well known Scottish Civil Engineering contractor, responsible for the piling and associated civil works involved with the new quay. Westminster Dredging carried out the dredging and reclamation following on from Rockfall, who –together with Terramare – pretreated rock within the dredge area by drilling and blasting. The majority of the dredged material was placed onshore to reclaim an area of Smith Embankment, protected by rock. To protect the new quay, a 100 m long rubble mound extension to the existing Albert Quay breakwater was constructed, for which a total of 130,000 tonnes of rock were used; the remainder armourstone with individual weights of 10 to 16 tonnes. Rock placement was carried out by Manu-Pekka fitted with a special rock grapple. Subsequently, the 120 m long, open piled quay was built along the inside of the extension to the breakwater. The orientation of the breakwater extension has been determined to minimize the reflection of waves on to the oil tanker jetty and the Princess Royal jetty on the south side of the bay. Westminster Dredging have dredged some 100,000 m3 of sand, silt, clay weathered and pretreated rock. This work was carried out by backhoe Manu-Pekka, together with split hoppers Long Sand and Cork Sand. Other associated works included the demolition of the western end of the existing Albert Quay before the new extension was constructed.

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Dredging of sediments, Miami river

The Miami River, which flows through an urban industrial area of Miami, Florida, had not been dredged since the area was built in 1934. In 1990 the US Army Corps of Engineers advised the city that the sediment had to be removed from the river as it was impeding shipping. There was one caveat however: the sediment, contaminated with heavy metals, pesticides and oil, could not be placed in the ocean.

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Gas fields development, Krishna Godavari basin

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The city of Poti is located at the mouth of Georgia’s largest river, the Rioni. It has been an important trade centre for centuries. Since the early 19th century, many plans have been developed for the creation of a major sea port. Construction work started in the 1850s on the main breakwater that is still protecting the port today. During its long lifetime, this structure has been maintained by frequently adding 20-60 tons of concrete cubes to the armour layer. Significant settlement of the structure over time has lowered the crest level considerably, resulting in large overtopping volumes and therefore in port-operation downtime. As a result, a rehabilitation project was executed between 2006 and 2008 by Royal Boskalis Westminster N.V. to reduce the downtime caused by overtopping waves.

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Reclamation and dewatering works, Sepetiba Bay

The German steel-maker ThyssenKrupp Steel and the Brazilian mining giant Companhia Vale do Rio Doce (CVRD) teamed up to construct a EUR 3 billion steel factory at Sepetiba. This is a small town of 36,000 inhabitants near Rio de Janeiro with good access to the Atlantic Ocean. The new steel factory allowed Brazil not only to export more of its plentiful mineral resources, but also to produce semi-finished products that can be sold at higher margins. The government authorities of Brazil and Rio de Janeiro both supported the project.

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Port development, Lerwick

The Port of Lerwick is situated on the east coast of the Shetland Islands, and is operated by Lerwick Port Authority. The 2008 dredging and reclamation works were one of the largest marine projects to be carried out in Scotland in recent years and constituted the largest single investment in the port to date.

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Port construction, Vuosaari

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