It was a decision made by water itself. A deep low-pressure system, named Eleanor, drove a surge of water toward the Dutch coast. Sensors measured the rising pressure. Algorithms, refined over decades, compared the data to thresholds. There was no dramatic meeting, no minister giving a final order. The system, named the Delta Works, was designed to think for itself. On January 3, 2018, it reached a conclusion.
In the Maeslantkering, two immense, hollow steel arms—each the size of the Eiffel Tower lying on its side—began to fill with water. They sank, rotating silently on massive ball joints, to block the mouth of the Nieuwe Waterweg near Rotterdam. To the south, the Oosterscheldekering, a hybrid of dam and gate, began to lower its 62 steel piers. The Hartelkering and Hollandsche IJsselkering slid shut. In the far north, the Ramspolkering in the IJsselmeer completed the set. For the first time since the last barrier was completed in 1997, all five were sealed at once.
The event was met with quiet professional satisfaction. No cities flooded. No sirens wailed. The triumph was an absence. It was the land behind the barriers remaining dry, the polders unbreached, the memory of the 1953 flood that killed 1,835 people held firmly at bay. The Dutch have a relationship with the sea that is neither purely adversarial nor cooperative. It is managerial. They cannot defeat the water; they can only negotiate with it, impose a bureaucracy of barriers and pumps. The simultaneous closure was the ultimate expression of that philosophy: a total, automated, and temporary suspension of the negotiation, a drawing of a line that said, for now, you shall not pass.