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Rock Armour Defences for Entire East Riding Coastline Ruled Out

Using Rock Armour to defend the entire East Riding Coastline from Erosion is not an option.

Experts say the cost would be prohibitive and the effects might not actually be desirable.

East Riding councillors asked why a rock armour scheme at Withernsea couldn't be extended to the rest of the coastline.

The council's Civil Engineering Manager - Richard Lewis - says the Withernsea project wouldn't scale up.

Just under 70,000 tonnes of rock armour was imported by sea from Norway to construct the defence at Withernsea which was completed in 2020. The majority of the rocks used weigh between six and ten tonnes, but some reached as much as fifteen tonnes. This is thought to be amongst the largest used in such defences around the UK.

Concrete, Rocks and Timber do remain the best ways of building sea defences on the Yorkshire Coast according to the council's experts.

Richard Lewis says they have looked at a range of new products to help with defences against coastal erosion but found the traditional solutions perform better.


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