Au début du 19e siècle, Napoléon Ier lance le projet d'un canal trans-Cotentin, des Veys à Portbail. Les travaux sont assurés par des prisonniers espagnols et russes.
Seul le canal du Haut-Dick est ouvert à la navigation.
Le canal du Gravier est aujourd'hui une réserve de pêche.
Situation
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