6, 12, and 18 months thereafter. Because a navigation channel through the 

 ocean bar of the inlet was authorized in February 1982, tidal flow measure- 

 ments were planned following channel excavation — if it was excavated during 

 the course of the monitoring program. All of the measurements would be along 

 a single cross section within the throat of the inlet. Current velocities and 

 directions were planned at three to four vertical stations on the cross sec- 

 tion, with the observations made at three to five levels between the surface 

 and bottom at each station. Observations were to be made over a period of 

 about 14 hr to define the flows through a tidal cycle. 



25. Tidal current measurements were actually made in the throat of the 

 inlet on 22 April 1981, prior to the dredging of the sediment trap; on 11 June 

 1981, following the excavation of the trap; on 20 December 1981, approximately 

 6 months after trap excavation; and on 8 September 1982. The monitoring 

 schedule called for additional measurements following excavation of the ocean 

 bar channel; however, due to the extended period of dredging in the bar chan- 

 nel, those measurements were not taken. 



26. Beach surveys were made on a series of 28 profiles, beginning at a 

 point on Wilmington Beach 2,000 ft south of the southern town limits of Caro- 

 lina Beach (sta -20+00) and extending to Carolina Beach Inlet (sta 200+00). 

 Onshore surveys were made at all 28 stations; combined onshore-offshore sur- 

 veys were made at 15 stations. Profile stations included in the monitoring 

 program are listed in Table 2 and shown in Figure 7. 



27. The Wilmington District had performed an onshore survey of Carolina 

 Beach between baseline sta 0+00 and 135+00 in January 1981 prior to the emer- 

 gency beach fill and initiation of the monitoring program. Preemergency and 

 postemergency fill onshore and offshore profile surveys were made by the 

 dredging contractor during April and May 1981 between baseline sta 69+00 and 

 128+00. The dates, extent, and type of beach profile surveys made during the 

 monitoring period are listed in Table 3. 



28. Photographic overflights covered the shoreline from a point 

 2,000 ft south of the town limits of Carolina Beach to a point 2 miles north 

 of Carolina Beach Inlet. Color prints were provided on a 9- by 9-in. standard 

 format with 60 percent overlap between photographs at a scale of 1:6,000. In 

 addition, high altitude color photographs (1:12,000 scale) was taken of 

 Carolina Beach Inlet. 



29. Aerial photographs of Carolina Beach and Carolina Beach Inlet were 



12 



