Nieuwe Hollandse Waterlinie

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About Nieuwe Hollandse Waterlinie

The Nieuwe Hollandse Waterlinie (NHW) was a military line of defence that extended from the former Zuiderzee near Muiden to the Biesbosch in the Netherlands. The line was established as a protective ring approximately 85 km long and 3–5 km wide around the Dutch cities of Muiden, Utrecht, Vreeswijk and Gorinchem.
The NHW's primary element of defence was water. This was thanks to an ingenious water management system comprising sluices, flood canals, and existing waterways and dikes. A seemingly shallow layer of water, about 40 cm deep, was enough to make the land treacherous and difficult to pass for soldiers, vehicles and horses. At the same time, it was too shallow to navigate by ship. In total, the waterline could be completely inundated within only three weeks. Weak points along the natural defence line were strengthened with forts, bunkers and group shelters. In addition, the line included five fortified cities: Muiden, Weesp, Naarden, Gorinchem and Woudrichem.
The NHW is nominated as an UNESCO World Heritage Site.

For more information: www.hollandsewaterlinie.nl