seawalls Definition

breakwater, groyne, jetty, bulwark, groin, dikes, mole, concrete, vertical, massive, old, groins, revetments, breakwaters, bulkheads, construction, structures, jetties, front, design, effects, piers, groynes, beaches, levees, riprap, beach, built, constructed, build, protected, protect, construct, existing, abutments, aqueducts, barricade, buttress, buttresses, crest, dike, dykes, embankment, embankments, fences, pylons, towers, tunnels, uprights,