and 1921 and another 180 m from 1921 to 1962. Between 1962 and 1983, the 

 Point broadened westward, but did not accrete farther into Bull Bay. 



139. Bird Island, which lies within Bull Bay, is included in this anal- 

 ysis since it could not be adequately measured by the shoreline mapping tech- 

 nique. Bird Island first appears on the 1921 survey. Its subaerial surface 

 area was approximately 244,000 m 2 , and it was oriented in a northeast - 

 southwest direction with a length of approximately 1,460 m. It is not evident 

 on the 1934 survey, but by 1962, the island increased 1,150 m over its 1921 

 length, and area increased 232,000 m 2 . The 1983 survey shows an additional 

 increase in length of 180 m, but a decrease in surface area of 24,000 m 2 . Net 

 change from 1921 to 1983 was a 207,000-m 2 increase of surface area. Accom- 

 panying island length and area changes were position changes. The island as a 

 whole moved approximately 600 m northeast from 1921 to 1964 and 550 m south- 

 west by 1983. In 1983, it was approximately 250 m landward of its 1921 

 position. 



140. Sandy Point Beach forms the northeast side of Bull Bay. It has 

 experienced continuous onshore erosion since the 1875 survey. However, from 

 1875 to 1934, the spit tip accreted southwest approximately 610 m. Between 

 1934 and 1962, there was a dramatic reversal when the spit eroded 670 m along- 

 shore. Erosion continued from 1962 to 1983 (180 m) . Net change over the 

 range of data was 240 m of erosion. 



Key Inlet (Map 17) 



141. Key Inlet was a small, narrow (60 m wide) inlet during the 1875 

 survey. Landward shoreline erosion combined with eastward inlet migration and 

 westside erosion between 1875 and 1934. Net alongshore change west of the 

 inlet was a loss of approximately 50 m. Inlet width doubled by the 1925 sur- 

 vey, doubled again by 1934, and again by 1962. By 1983, inlet width had 

 increased to approximately 550 m. Also, by 1983, a long, narrow spit extended 

 from the east end of Lighthouse Island, which protected Key Inlet from direct 

 wave attack. The east side of the inlet rapidly eroded into Lighthouse Island 

 from 1875 to 1925, but only eroded a small additional amount by 1983. 

 Lighthouse Island/Cape Romain (Maps 17 and 18) 



142. Shoreline position changes at Cape Romain are responsible for 

 changes in surficial area and shoreline orientation on adjacent Lighthouse 

 Island. In 1874, Cape Romain was at its most seaward (easterly) extent, with 

 a small hook extending roughly 600 m southwest. The 1925 survey shows about 



113 



