Seawick Sea Defences Project - information page

Closes 1 Apr 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.

Coronavirus update: Our flood defence work continues in line with PHE guidance and where it is safe. Where work continues, we have ensured that everyone involved has been trained on social distancing and will not put anyone at risk. If the work cannot be done safely, the work will stop. For more information, please vitsit GOV.UK


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 2020 to early 2021, 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 
  • December: Rock deliveries complete (as of 7 December). Rock placement in the secondary area is now complete
  • Early 2021: Because of additional work, the project is expected to be complete in early 2021 (rather than the end of 2020). Specifically we are repairing part of the concrete ramp at Hutley's Gap (beach-side) and adding extra rock in front of it to resist erosion. The rock armour at Hutley’s Gap will be completed once work to the ramp is finished    

Expected working hours:

Day Working hours
Monday  7.30am-5.30pm
Tuesday  7.30am-5.30pm
Wednesday  7.30am-5.30pm
Thursday 7.30am-5.30pm
Friday 7.30am-5.30pm
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.

Project update: November

The project has got off to a good start. The rock deliveries are arriving regularly, and the team are working with the tides to place the rock. The rock armour at Hutley’s Gap is well underway and the team are beginning work on the rock armour at the secondary area (working east to west). The rock deliveries are currently on schedule to be completed by the end of the month.

The area used for vehicles moving the rock on the beach is within the footprint of the rock armour and will be covered with the rock armour or removed before scheme completion.

Image above: Excavators working to place the rock for the rock armour

Image above: Environment Agency overseeing building of the rock armour at Hutley’s Gap, Seawick

Image above: Temporary access steps have been installed at the western end of the works area to help the public get access to and from the beach until permanent steps are in place

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