from 1872/73 to 1934, eroded from 1934 to 1962/63, and accreted slightly to 

 1983. As a consequence of changes on both sides of the inlet, inlet width 

 decreased from 800 to 360 m between 1872/73 and 1934, increased to 550 m wide 

 in 1962/63, and decreased to 420 m wide in 1983. 

 Winyah Bay Entrance (Map 20) 



149. Jetties at Winyah Bay Entrance were completed around 1900. North 

 Island, north of the inlet, built alongshore to the south to 1962/63. Net 

 change in subaerial surface area of North Island was an increase of 



2.2 x 106 m 2 from 1857/58 to 1962/63. Between 1962 and 1983, erosion resulted 

 in area losses of roughly 439,000 m 2 . Net change in length of North Island 

 was an increase of 1,280 m between 1857/58 and 1983. South of the jetties, 

 South Island has undergone major changes in shoreline position, probably 

 related to jetty construction. Between 1872/73 and 1925, South Island did not 

 change drastically except that a long (4,500 m) , thin, arcuate -shaped island 

 formed from the jetty southward, roughly paralleling South Island's coastline. 

 This thin island was up to 3,100 m offshore of South Island. The 1934 

 shoreline on South Island was similar to previous dates, except near Santee 

 Point. The offshore island, however, changed to a "V" shape, with one leg 

 anchored around the jetty. Maximum southwest elongation is approximately 

 1,100 m, and it moved about 300 m landward since 1925. The 1962/63 survey 

 shows formation of a large island positioned inland of the 1934 island and 

 2,000 m of accretion on South Island's shoreline. This new island was 

 primarily south of the jetty, but a small spit extended north (700 m) . By 

 1983, area behind the 1962/63 island had filled in, leaving only a small tidal 

 channel. The 1983 shoreline of South Island immediately south of the jetty 

 was about 180 m landward of the 1962/63 small island shoreline. Farther 

 south, shorelines show no offset. The 1983 south jetty survey shows a large 

 spit (over 2,000 m long) extending into Winyah Bay. By 1983, a small 1962/63 

 spit extending north of the south jetty increased in area by 2.1 x 10 6 m 2 . 

 South Island area changes south of the jetty are presented in Table 12. 

 North Inlet (Map 21) 



150. South of North Inlet, a long spit projected north in 1872. This 

 spit eroded alongshore south approximately 1,600 m by 1925/26. Between 

 1925/26 and 1983, net alongshore change south of the inlet was approximately 

 200 m of northward accretion. Alongshore drift reversal prior to 1962 is evi- 

 dent by extension of a small northward trending spit from the 1962 shoreline. 



116 



