NOTE' 



CONTOURS REPRESENT 

 CHANGES IN FEET ( POSITIVE 

 AND NEGATIVE ) BETWEEN 

 1986 AND 1992 SURVEYS 



N 1. 142.000 



Figure 26. Contours of bathymetric changes between September 1986 and August 1992 surveys 



north of the West Landing. The 1 995 survey extended further north of the detached 

 breakwater and included more data inside the harbor than the previous survey. 



Contours of bathymetric changes that occurred between the August 1992 and 

 July 1995 surveys are shown in Figure 28. The figure shows that the old (1992) 

 scour hole location has filled in about 1 .8 m (6 ft), with a 1 .8-m (6-ft) cut at the new 

 location to the west. The accretion immediately adjacent to the north side of the 

 detached breakwater in 1992 had subsided by 3 m (10 ft). Not shown on the figure 

 (due to lack of data in 1992), however, is a shght shift in the underwater spit north 



Chapter 2 Monitoring Program 



35 



