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Marine Construction

Whereas dredging can be relatively straight forward, marine construction can involve dealing with a variety of operations including removal and placement of rock armour, excavation of long sea outfalls and excavation of cofferdams, including demolition works.

We are able to offer heavy duty long reach excavators with a variety of attachments to undertake even the most challenging projects using our experienced operators, where detailed knowledge of marine construction is vital.

Please do call us to discuss your individual requirements or you may also like to review our case studies and project list of recent work below.

Recent Projects:

  • Rock armour placement, Exmouth
  • Rock armour placement, Brixham Breakwater
  • Removal of scour protection, Portsmouth
  • Cofferdams, Albert Embankment/ KEMP/ Blackfriars, Thames Tideway, London
  • Demolition work, Peterhead Harbour Redevelopment, Scotland
  • Demolition work, Western Dock Redevelopment, Dover
  • Demoltion work, Wick Harbour, Beatrice O&M Base, Scotland
  • Caisson Remediation, Brighton Marina
  • Demoltion & Cofferdam Mamhead Slipway, Exmouth
  • Cofferdams, Queensferry Crossing, Scotland
  • Cofferdam excavation & pile removal, V&A Museum Dundee, Scotland
  • Beckton, water treatment outfall, Thames Tideway
  • Cowes Breakwater, Isle of Wight
  • Storm water and water treatment scheme sea outfall, Margate
  • Nigg Energy Park, Rock Armour Placement & Piling, Scotland (see Coastal Dredging for full Case Study)

Case Studies - Marine Construction

  • Ambergate Rail Bridge Scour Protection >

    Read More
  • Dover Western Dock Redevelopment Demolition >

    WM Plant Hire were employed for demoliton works on the Port of Dover's biggest project in 70 years, a £120 million redevelopment of the Western Docks. Read More
  • Caisson Remediation Brighton Marina >

    WM Plant Hire's long reach machines were required for a vital part of the Brighton Marina Caisson Remediation Project with a scope that required 24/7 working in an active marina. Read More
  • Flood Alleviation Scheme Dutch River, Goole >

    Following a tidal surge in December 2013 widespread disruption was created along the east coast.  The surge entered the Humber and associated rivers and channels including the Dutch River so concerns were raised about flood risks. A permanent flood defence using a combination of sheet piling and rock armour was constructed to mitigate the risk. Read More
  • Mamhead Slipway Exmouth >

    The £1.2 Mamhead Slipway was funded by the East Devon District Council as a larger more practical alternative to the existing slipway on the River Exe.  Contractors with the help of WM Plant Hire had to work against the clock to complete construction during the summer season.   Read More
  • Queensferry Crossing Cofferdams >

    The Queensferry Crossing, finance secretary John Swinney said, would the the "...largest construction project in a generation in Scotland."  WM Plant Hire has been involved in the job since the first marine works with the excavation of the first and last cofferdam. Read More
  • Milford Haven Dock Construction >

    McLaughlin & Harvey worked with WM Plant Hire on the Port of Milford Haven's £6m Dock Lock Project which saw the installation of a new set of Lock gates for the dock. Read More
  • Bridlington Sea Outfall >

    The Bridglington Offshore Works (long sea outfall) was one of 3 construction contracts part of the Bridlington revised Bathing Water Directive Scheme.  The sea outfall is one of the longest in the UK at 1.25km long. Read More
  • Cowes Breakwater >

    The Cowes Breakwater consists of a 350 metre long, detached rock armoured breakwater designed to protect existing homes, businesses and harbour users to enable continued regeneration of East Cowes and so bring further economic benefits to the Isle of Wight. Read More
  • Thames Tideway Project, Beckton Outfall >

    Beckton STW, one of Europe's largest sewage treatment works, is being upgraded as part of the Thames Tideway scheme, with the addition of a new outfall from which the processed water from the Lee Tunnel will then be discharged into the Thames.  Read More
  • Margate Stormwater outfall – Offshore underwater excavation >

    EU directives for improved water quality led to the construction of a wastewater treatment scheme for Margate and Broadstairs linked to a vital sea outfall some 12km away. The marine works were a key element to the success of the project. Read More
  • Underwater rock armour protection at Hoyle Offshore Wind farm >

    During construction of an offshore wind farm at North Hoyle, Briggs Marine were appointed to carry out submarine cable installation and scour protection measures to the base of the turbine masts. Read More
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