Imposante sluiting

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The closure of the Volkerak dam. Abutment caissons are placed at the beginning of the dam. Next, the twelve passage caissons are sunk next to each other. The floating bulkheads are removed from the caissons so that the water can pass through freely. Finally, the last caisson is brought into place by tugboats as a hinge. Ir. Swier, head of the construction of the Volkerakdam, gives instructions by walki-talki. The valves are opened and the caisson sinks into place, after which the ships honk their horns. The caisson is then filled with stone. With images of the scale model in the Waterloopkundig Laboratorium De Voorst in the Noordoostpolder.

Human-made No record of this work says a model made it. What this means.