dime was leveled immediately to the north of the study site for construc- 

 tion of a new condominium in May 1969 (Fig- 7). A trench approximately 

 15 feet (4.6 meters) deep and 300 feet (90 meters) long was excavated for 

 the construction of a protective seawall, with the spoil placed on the 

 beach in front of the excavation. 



Figure 7. Dune leveling at Boca Raton site, 7 May 1969; 



midtide, falling (H = 3o4 ft, T = 3.6 s. 



^& 



2°) 



There are no groins in the immediate vicinity of the site although 

 there are niimerous groins, seawalls, and bulkheads farther north. Both 

 South Lake Worth Inlet and Boca Raton Inlet are stabilized by parallel 

 jetties. Sand was dredged and bypassed at South Lake Worth Inlet at an 

 average of 77,500 cubic yards (59,300 cubic meters) per year between 1969 

 and 1973 (Ward, 1972). Boca Raton Inlet, an improved natural inlet, was 

 dredged to an 8- to 12-foot (2.4 to 3.7 meters) channel depth in April 

 1969 by a private developer and has been continuously maintained since 

 that time. 



U.S. Army, Corps of Engineers (1971) determined that between 1929 

 and 1955 there was a net loss of about 1 million cubic yards (765,000 

 cubic meters) above the 18- foot (5.5 meters) depth contour along the 16 

 miles (26 kilometers) of shoreline south of South Lake Worth Inlet or 

 approximately 0.5 cubic yard per foot (1.25 cubic meters per meter) of 

 shoreline per year. 



c. Hollywood . The Hollywood site is located in southeast Broward 

 County, approximately 15 miles (24 kilometers) north of Miami (Fig. 1). 

 It is the least exposed of the three sites. With the Great Bahama Bank 



19 



