normal sorting action and the reestablishment of the normal profile 

 configuration. 



Further protective action was completed on Carolina Beach in December 

 1970. A 340-meter (1,100-foot) rubble-mound seawall was constructed, extend- 

 ing southward from the northern limit of the project. At the same time 

 264,500 cubic meters (346,000 cubic yards) of fill, obtained from the sediment 

 deposition basin in Carolina Beach Inlet, was placed along the northern 1200 

 meters of the project. This was followed up by the placement of 581,000 cubic 

 meters (760,000 cubic yards) of fill along the southern 3500 meters (11,400 

 feet) of beach. Work on the southern section was completed in May 1971, and 

 the beach-fill material was obtained from a borrow area in the Cape Fear 

 River. The rubble-mound seawall was extended an additional 290 meters (950 

 feet) southward, with the work being completed in September 1973. This 

 brought the total length of the seawall to 625 meters (2,050 feet). 



Progressive erosion along the north end of the project and the occurrence 

 of two "northeasters" during December 1980 resulted in the partial destruction 

 and condemnation of about 10 homes immediately south of the southern end of 

 the seawall. Non-Federal interests placed large sandfilled nylon bags (emer- 

 gency protection devices) along 230 meters (750 feet) of the shoreline to 

 prevent any further damage to upland property. 



During May 1981, 230,000 cubic meters (300,000 cubic yards) of fill from 

 Carolina Beach Inlet and 76,500 cubic meters (100,000 cubic yards) from the 

 Atlantic Intercoastal Waterway was placed on the northern end of the project 

 as an emergency measure. Present plans call for placement of 2,900,000 cubic 

 meters (3,800,000 cubic yards) of fill to be obtained from an upland borrow 

 area adjacent to the Cape Fear River. This work was scheduled for spring 

 1982. The photo in Figure 6-18 shows the condition of Carolina Beach in 

 1981. The view is facing southward from the northern fishing pier (approx- 

 imately the same as Fig. 6-17). 



b. Redondo Beach (Malaga Cove) , California (Fisher, 1969; U.S. Army 

 Engineer District, Los Angeles, 1970; Hands, in preparation, 1985). An 

 authorized beach restoration project at Redondo Beach, California, provided 

 another opportunity to use an offshore sand source (see Figs. 6-21 and 

 6-22) . The availability of sand below the 9-meter contour immediately seaward 

 of the project was investigated in two stages. The first stage, a geophysical 

 survey with an acoustical profiler indicated that enough sand was available 

 for the project. In the second stage, core samples were obtained from the 

 ocean by use of a vibrating core-extraction device. An analysis of the core 

 samples verified an offshore sand source of acceptable quantity and quality. 

 This source covered an area 2.3 kilometers (1.4 miles) long by 0.8 kilometer 

 (0.5 mile) wide about 340 meters offshore (shoreward limit). It would produce 

 1,900,000 cubic meters (2,500,000 cubic yards) of sand if it could be worked 

 to a depth 16 meters (52 feet) below mean low low water (MLLW) between the 9- 

 to 18-meter-depth (30- to 60-foot) contours. An additional 1,900,000 cubic 

 meters of sand could be recovered by extending the depth of the excavation to 



6-28 



