Katwijk Coastal Reinforcement Works Completed

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Katwijk Coastal Reinforcement Works Completed

Dutch-Danish consortium Ballast Nedam - Rohde Nielsen has completed a 18-month reinforcement project in Katwijk along the Dutch coast. The official handover took place on 19 February with a symbolic placement of the last paving stone

The new coastal defence scheme protects Katwijk with a unique dike-in-dune construction and an underground car park built between the dike and the boulevard.

Clients of the project were national agency for public works Rijkswaterstaat, province of South Holland, water board of Rhineland and municipality of Katwijk.

Ten weak spots along Dutch coast

The Katwijk Coastal work is part of a national 780 million euro programme to reinforce the Dutch coast at ten locations. In 2003 coastal authorities concluded that the current sea defences at these locations were unable to withstand a super storm.

For all 10 locations reinforcements projects were started and combined with other goals, if possible.

Coastal reinforcement combined with other functions

For the coastal city of Katwijk this led to the construction of a dike combined with the construction of a parking garage and newly decorated dunes.

In close consultation with residents a landscape design was made, transforming the city's seaside in an attractive resort.

Other innovative coastal projects

A comparable coastal defence project was completed in 2013 for the city of The Hague where Spanish architect Manuel de Solà-Morales designed an eye-catching boulevard built on dike-in-dune construction.

Another innovative coastal reinforcement project is the Sand Engine in 2011; A hook-shaped peninsula as creasted with a huge volume of sand. Wind, waves and currents are now spreading the sand naturally along the coast, reinforcing the weak spot in coastal defence.

Source: Dutch Water Sector

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