Flood Defence Repairs - Malyons Sluice - Projects - MLM
Flood Defence Repairs - Malyons Sluice - Projects - MLM
Flood Defence Repairs - Malyons Sluice - Projects - MLM
Flood Defence Repairs - Malyons Sluice - Projects - MLM

Flood Defence Repairs – Malyons Sluice

Project Information
  • Location
  • Hullbridge
  • Sector
  • Transport, Ports & Harbours / River & Marine
  • Services
  • Infrastructure, Civil Engineering, River & Marine Engineering

The toe of the Essex block revetments on the upper reaches of the tidal River Crouch are protected by salt marsh, which in some areas had been eroded. MLM on behalf of The Environment Agency and in conjunction with JacksonHyder investigated options to reinstate the salt marsh, thus protecting the toe of the revetment and mitigating future deterioration.

The initial option of using gabion mattresses was considered to pose a hazard to trapping of dog paws on this popular dog walking route, therefore MLM proposed to use a combination of Rock Rolls and brushwood faggots. This solution had the added benefit of being easier to manhandle on the foreshore at low tide. A large proportion comprised timber elements which were both sustainable and had low carbon impact.

The provision of brushwood faggots allows sediment to build up and vegetation to self-colonise. This recreates the saltmarsh which had previously been eroded.

MLM reviewed the temporary structure (access for construction traffic over the existing dyke originally designed by the contractor) and commented on suitability of the structure for the permanent use. Following the review the dyke crossing was redesigned to be a large diameter HDPE pipe and was retained as permanent crossing.

The access route to the site also required crossing a High Pressure gas pipeline and MLM designed the necessary protection works in accordance with National Grid Standards.

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