NOTE: 



CONTOURS REPRESENT 

 CHANGES IN FEET (POSITIVE 

 AND NEGATIVE) BETWEEN 1992 

 AND 1995 SURVEYS 



NOTE: 



CONTOURS AND ELEVATIONS 

 SHOWN IN FEET REFERRED TO 

 MEAN LOWER LOW WATER (MLLWI 



Figure 28. Contours of bathymetric changes between August 1992 and July 1995 surveys 



cross sections through Areas A and B (at locations shown in Figure 29) are 

 presented in Figures 33 through 35 for the various surveys. Contours of bathy- 

 metric changes that occurred between September 1986 and August 1992 are shown 

 in Figure 36, and those occurring between August 1992 and July 1995 are presented 

 in Figure 37. Erosion and accretion volumes were calculated for each area. Results 

 indicate that, during the period 1986 through 1992, approximately 3 1 ,960 cu m 

 (41,800 cu yd) of scour occurred in Area A and about 13,070 cu m (17,100 cu yd) 

 of accretion occurred in Area B. This was the result of post-breakwater modifi- 

 cations. Between 1992 and 1995, Area A accreted about 4,660 cu m (6,100 cu yd) 

 and Area B accreted approximately 5,350 cu m (7,000 cu yd) of material. Net 

 volumes (between 1986 and 1992) are 27,300 cu m (35,700 cu yd) of scour in 

 Area A and 1 8,420 cu m (24,100 cu yd) of fill in Area B. 



Chapter 2 Monitoring Program 



37 



