First pile for construction of Dubbele Dijk tidal culvert in the ground

With a resounding blow, Delta Program Commissioner Peter Glas, Annette van Velde of Noorderzijlvest Water Authority, Johan Koopmans of the Province of Groningen, and representatives of the Flood Protection Programme, the Wadden Fund, and Friso Bouwgroep drove the symbolic first pile for the construction of the Dubbele Dyke tidal culvert in Bierum today. The festive kickoff took place in the presence of participants on an excursion to the Dubbele Dyke, as part of the National Delta Congress in Groningen.

A 92-meter tube

Since August, hard work has been underway on the construction of the construction pit. This watertight steel structure protects the land against flooding and makes it possible to safely build the dyke passage during the storm season. Now that the construction pit is ready, the piles for the foundation can be driven into the ground. The tidal culvert a concrete tube almost 92 meters long, with a diameter of 2 meters high and 3.5 meters wide. Salt water will soon flow in and out of the area through this tube. The work is being carried out by a combination of Friso Civiel and Heuvelman Ibis. 

Tidal culvert

The tidal culvert the connection between the Eems and the area behind the sea dyke. A pipe dyke placed in the dyke through which salt water flows in and out of the area twice a day. This means that the area between the two dykes is dykes influence of the tides (ebb and flow). The tidal action allows silt from the Eems to settle here and brackish water nature to develop. The brackish water also makes saline agriculture and aquaculture possible. 

Taste Double Dyke 

The Double Dyke Bierum is a pilot project of Noorderzijlvest Water Authority, the Province of Groningen, and the national Flood Protection Programme HWBP). The project is investigating whether the Double Dyke is Dyke alternative to raising and widening dykes. What makes this innovative dyke unique dyke its combination of flood protection, nature, agriculture, and recreation. The pilot is also part of the multi-year Eems-Dollard 2050 program. 

Want to know more?

Noorderzijlvest Water Authority dykes flood embankments they remain strong enough to hold back water. We are responsible for the 70-kilometer-long sea dyke Lauwersoog and Delfzijl. Want to know how we do that? Visit the "Maintenance dykes flood embankments" page

More information about the Double Dyke the tidal culvert can also be found on the website of the Province of Groningen.

First pile for construction of Dubbele Dijk tidal culvert in the ground