The project mainly consists of a ramp type breakwater. The northside sand preventing dyke is 10905m long. The top level is +3.5m and the length is 5.87km including sand placing for bedding, plastic dewatering sheet installation, geotextile placing, crushed rock bedding, jetty core rocks, grid type revetment panel, etc. Top width of the breakwater is 5m. And cast in-situ L shape capping beams were installed on the top.