Seawick Sea Defences Project - information page

Closes 11 Jan 2021

Opened 28 Sep 2020


The Seawick Sea Defences project will reduce flood risk to approximately 1800 static caravans, 343 chalets and 27 other residential properties and 103 non-residential properties within the flood plain. To do this we will place rock armour at the toe of the existing defence.


We will be improving and extending the rock armour around the seawall at Seawick in two areas: ‘Hutley’s Gap’  and a secondary area to the west (in front of Bel Air Estate).  This will better protect against erosion and extend the useful life of the seawall.

When is the work happening?

The work will take place from October to December 2020, subject to weather conditions.

We have employed the services of contractors Van Oord to carry out construction of this project.

Latest project timeline:

  • October: Rock deliveries start. Work starts at Hutley’s Gap
  • November: Hutley’s Gap complete. Work starts at secondary area. Rock deliveries finish
  • December: Secondary area complete

Expected working hours for week beginning 26 October and 2 November:

Date Working hours
Monday  5am-9pm
Tuesday  5am-9pm
Wednesday  5am-9pm
Thursday 5am-9pm
Friday 5am-9pm
Saturday 8am-1pm

Why are we doing this work?

The beach material at Hutley’s Gap and the secondary area is being eroded by the sea and if this work is not carried out, the seawall’s condition will continue to deteriorate and larger more expensive works will be required in the near future.

The area behind the seawall is largely below sea level, and includes several caravan parks and the Bel Air Chalet Estate. If the seawall failed, a tidal surge could inundate that area, significantly impacting local residents and economy.

By undertaking the work now we are extending the useful life of the existing seawall in the most cost effective way.

What does the work involve and how will the scheme be constructed?

Rock will be brought by road to a temporary holding area or 'rock storage area'. There will be 20 loads per day between 8am and 6pm Monday to Friday, and 8am to 1pm on Saturday. 

Construction of the rock armour will be focussed around low-tide. Tendring District Council have agreed the working hours of 5am to 9pm Monday to Saturday to enable us to work during at least one low tide per day.

Dump trucks take the rock from the rock storage area to where it is needed. Excavators then place the rock to form the rock armour.

Image above: Rock armour being built

How will this work benefit you?

This work will ensure the existing seawall continues to provide the current level of tidal flood protection.

We will update this page as the project progresses. If you have any questions, please get in touch using the contact details at the top of the page.


  • Businesses
  • Charities
  • Statutory organisations
  • NGOs
  • Members of the public
  • Elected representatives, including MPs
  • Local councils
  • Environment Agency customers
  • RFCCs


  • Flood management
  • Coastal management