Emergency Flood Works in Sandwich

Case Study Overview

Red7Marine supported Mackley’s / Van Oord as part of its emergency flood prevention works in the historic town of Sandwich in Kent. Mackley’s responded to the contract quickly and efficiently as the town was at high risk of flooding, posing a safety risk to the public.

At a glance

  • Location: Sandwich, Kent
  • Plant used: Haven Seajack 4
  • What we did: Supporting the Mackley / Van Oord team,
    Red7Marine utilised its Haven Seajack 4 jack-up barge which enabled a 38T excavator with Movax and hammer attachments to operate from the water for emergency flood works in Sandwich

The Challenge

It had been identified that a short section of the River Stour’s wall (approximately 35m in length) was on the verge of ‘catastrophic collapse’, potentially leading to serious flooding in the town of Sandwich. This was putting the health and safety of the public at risk.

The Environment Agency required emergency works to construct and install a new anchored sheet pile wall, with a capping beam and new brick wall to match the existing vernacular. Mackley / Van Oord was awarded the contract and Red7Marine supported the project with its specialist marine kit.

Sandwich Challenge

The Solution

It was important that the solution was delivered as quickly as possible. Part of this included the ability to provide obstruction free access via the water by using Red7Marine’s specialist jack-up barge. Ultimately, this greatly improved the speed by which the project could be delivered. In fact, the project was expected to take three weeks but thanks to our collaborative approach, it was completed in just one week.

The Haven Seajack 4 was used  by the Mackley’s / Van Oord team alongside a 38T excavator to carry out a range of work, including installing concrete plugs and partially backfilling the sheet piles and existing wall, wielding and installing the waling to the back of the sheet pile wall and coring and stitch drilling to enable the ground anchor installation.

Sandwich Solution

Fast Response

As a result of the time sensitive nature of this project, Red7Marine responded quickly and efficiently which enabled the works to be completed ahead of schedule, reducing the risk of flooding in the area.


Working collaboratively, the Red7Marine team worked closely with the Mackley’s / Van Oord team to complete these works safely.

Specialist Equipment

Red7Marine’s Haven Seajack 4 was used in the project as a result of its ability to withstand harsh marine environments, providing a stable working platform.




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“It is always a pleasure working with such a highly motivated and professional team, from office to site team working alongside us we could not ask for any better working partnership between our companies. Once again, many thanks and look forward to our next project.”

Lawrence Rogers, Works Manager Mackley