Boskalis Westminster has worked on a wide variety of contracts and projects over many years. We have learned to manage complexity, mitigate risks and simplify execution. Whatever the requirements - whether it is standard maintenance dredging, a complex project requiring different engineering and design elements, or long term services - Boskalis Westminster can tailor innovative and competitive solutions.

Projects

Project

Dover Western Docks Revival

VSBW (joint venture comprising VolkerStevin and Boskalis Westminster) were proud to be involved in the Port of Dover's flagship Dover Western Docks Revival development, delivering the marine structures and bridge contract. This scope included the design and build of two new berths including quay walls and land reclamation, a new marina pier, the marina curve, navigation channel and new lock gates, Bascule Bridge and capital dredging work. Approximately one million cubic metres of silt, gravel and chalk were removed from the harbour and required two million cubic metres of sand for use as infill material for land reclamation. The works included 1,175,000m³ of capital dredging, 1,050,000m³ of reclamation, 51,000 tons of rock revetment and 135,000m³ of temporary stabilisation bunds.

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Project

Peel Ports Maintenance Dredging

For the Peel Ports Term Maintenance Contract, Boskalis Westminster Limited (BWL) provided maintenance dredging services for all of the Peel Ports facilities in the Northwest of England and Scotland. This entailed the surveying and dredging of the Manchester Ship Canal (MSC) from the approaches to Eastham Locks to Trafford Road Bridge in Manchester Docks including Queen Elizabeth Oil Dock; Liverpool Approach Channel and Docks; Heysham Approach Channel, Harbour Entrance and inner Harbour; River Clyde from Greenock to Glasgow.Originally a three year contract with an option for another two, this contract was developed by Peel Ports in conjunction with BWL as a follow on from the previous two ten-year Term contracts executed by BWL for the maintenance dredging of the Manchester Ship Canal, long term maintenance operations in Heysham and on the Clyde as a result of Peel Ports taking ownership of Mersey Dock and Harbour Company (MDHC). While originally designed to be campaign based the contract was developed to better suit the client’s individual port requirements with more reliance on BWL’s knowledge of the individual ports such as MSC and Heysham; a continued campaign based strategy for Clydeport and Liverpool Approach Channel and targeted maintenance dredging based on Peel Ports’ marketing requirements and priorities for Liverpool Docks. The vessels were deployed as and when required to suit the operational needs of each individual port. Operational information, knowledge and experience gained through the historical contracts was utilised to maximise production.

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Project

Dublin Berth 50A Development

Dredging for a new berth to a depth of -11.0m CD. The dredge area contained a proportion of contaminated material.The first phase of the works required the dredging of a reception pit, within the site footprint, to -15.0 CD for the disposal of the contaminated material. The backhoe Manu Pekka and split hopper barges Cork Sand and Long Sand were deployed from the Boskalis fleet. Uncontaminated material was transported to the licensed offshore disposal site at Burford Bank in Dublin Bay. Additional vessels were the Dublin Port tug Poolbeg and survey vessel Depthfinder.

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Project

Drogheda Term Maintenance

The maintenance works consist of dredging of the River Entrance Channel and Seaward Approaches to the River Boyne and the maintenance dredging of the Navigation Channel to Drogheda, including a number of specified berths.Maintenance operations were planned to coincide with our existing contractual obligations in South Wales, minimising the mobilisation and demobilisation required for Drogheda, with an option for an immediate response should the safe navigational depths of the Entrance Channel reach predetermined critical levels. Regular interim surveys were provided by Drogheda Port Company where required. The works allowed for the most effective dredging by targeting high spots, limiting over dredging beyond the design depth and maximising the tidal window available to the dredger. The expected volume of silts and fine sands to be dredged was 90,000m³ per annum.

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Project

Dublin Port Maintenance

The works are for the maintenance dredging of the River Liffey from the East Link Bridge to the outermost section of the Fairway, approximately 1.5 nautical miles seaward of the breakwaters, along with the specified berth pockets within the port area. Bi-annual campaigns in the order of 4 weeks per campaign are undertaken with the dredge volumes expected to be in the order of 400,000m³. The dredge materials are generally silt inside the port and sand in the approach channel. The term contract includes an element of contaminated material up river which is to be dredged first and capped at the disposal area in accordance with the Environmental Protection Agency disposal at sea permit.

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Project

Belfast Maintenance Dredging

This project involved the maintenance dredging to restore navigation depths in specified areas of the Port of Belfast. The four main areas of the port are: Area 1 – Central, Area – 2 Herdman Channel, Area 3 – Musgrave Channel, Area 4 – Turning circle, Victoria Channel and Approach Channel.Trailing suction hopper dredgers, Crestway and Medway worked together tom complte ethe dredging works. A contract duration of twelve weeks was permitted, however the works were complete in four.

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