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It could be a groin, jetty, seawall, or breakwater. Rip-rap is a common material made up of broken rocks or concrete to protect the shore.

A groin is constructed of rocks or wood to maintain or widen beaches that are losing sand. A Seawall is solid concrete designed to protect property from the force of breaking waves. Breakwaters are designed to protect boats. a jetty is a wall of rocks that helps control currents and provides protection for a channel at an inlet.

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14y ago

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