— Cap* Hatteras 



BEAUFORT 

 MASONBORO INLET 



LITTLE RIVER INLET 

 MURRELLS INLET 

 WINYAH BAY 

 CHARLESTON 



SAVANNAH RIVER 

 ST MARYS ENTRANCE 



ST JOHNS RIVER 



PONCE DE LEON INLET 

 — ■ Cope Canaveral 



Figure 2. Major jetties in the South Atlantic Bight. 



channel from the 

 construction of 

 Masonboro Beach 

 southern jetty is 

 al. 1984). 



south necessitated the 



a southern jetty off 



in 1979-1980. The 



560 m long (Whalin et 



Little River Inlet, between North and 

 South Carol ina 



Two jetties, both approximately 1,090 

 m in length, were constructed between 1981 

 and 1983 (Hansen and Ward 1986). They are 

 designed to protect the channel between 

 Bird Island to the north and Waites Island 

 to the south. 



Murrells Inlet, South Carolina 



The north jetty extends some 1,040 m 

 off Garden City Beach and was constructed 

 between 1977 and 1979 (Van Dolah et al . 

 1984). The south jetty, off Huntington 

 Beach, is approximately the same length 

 and was constructed between 1979 and 1980. 



Winyah Bay, South Carolina 



Two jetties were constructed around 

 the turn of the century at the entrance to 



Winyah Bay. A photograph in the office of 

 Senator Bill Doar, Georgetown, SC, shows 

 them under construction in 1898. The north 

 jetty off North Island is some 1,938 m in 

 length, while the south jetty off Sand 

 Island is 4,060 m long. 



Charleston, South Carolina 



Construction on two jetties, 4,060 to 

 4,689 m in length, was completed in 1896 

 (Neal et al . 1984). Since that time 

 Sull'ivans Island to the north has 

 experienced a net accumulation of sand, 

 while Morris Island to the south has 

 suffered severe erosion. 



Savannah River, Georgia 



There are two jetties constructed 

 between 1890 and 1898 that protect the 

 Savannah River Harbor (Griffin and Henry 

 1982). These jetties extend seaward 

 approximately 3,658 m and have interrupted 

 littoral transport of sand to the south. 

 This and continued dredging of the channel 

 have resulted in considerable erosion on 

 Tybee Island, located south of the 

 Savannah River. 



St. Marys Entrance, between Georgia and 

 Florida 



The entrance is bordered on the north 

 by Cumberland Island and on the south by 

 Amelia Island. Work began on the two 

 jetties in 1881 and continued until they 

 reached their present form in 1927 

 (Parchure 1982). The north jetty is 5,980 

 m long and the south jetty is 3,500 m in 

 length. Since their construction, sand 

 has accumulated on both the north and 

 south sides of the entrance. 



St. Johns River, Florida 



The initial jetties were constructed 

 between 1880 and 1895. The northern jetty 

 extended 3,500 m seaward from Fort George 

 Island. The southern jetty extended from 

 Guano Island and was 2,650 m long. Work 

 continued periodically until 1951 when the 

 jetties attained lengths of 4,430 and 

 3,490 m, respectively (Pilkey et al . 

 1984). The jetties have interfered with 

 the southward transport of sand and have 

 caused severe erosion to the south of the 

 inlet. 



