Building a coastal road starts with one unexpected step — draining the sea. Cofferdams seal off a section of ocean, water is pumped out completely, and the seabed becomes a dry construction site. Excavators dig pier foundation pits, prefabricated concrete caissons are lowered to lock the road's weight into stable bedrock, and crushed stone isolation layers separate concrete from corrosive seawater. Once piers reach full strength, cofferdams are removed and the structure stands exposed in open ocean. Upper formwork, steel, and concrete connect both sides into one unified structure before final asphalt paving completes the road. The surface looks simple — but underneath is a complete system engineered to resist ocean waves permanently.
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