locations. Geotextile fabric was placed on the existing bottom followed by 

 placement of the bedding stone directly on the filter fabric. Stone was 

 supplied to each breakwater location via a front-end loader running between 

 the stone stockpile areas at the north and south ends of the project area and 

 each sand causeway. The front-end loader dumped the stone into a steel 

 containment bin placed at the bay ward end of each causeway. A backhoe was 

 then used to remove the stone from the containment bin and place it in the 

 breakwater section. This procedure is illustrated in Figure A4. 



The first two or three breakwaters at the south end and north end of the 

 project area were constructed initially to "anchor" the existing beach material 

 and the intermediate beach fill. Immediately following construction of the 

 breakwater segments, wave diffraction through the gaps began to form the 

 salients. The pre- and post-construction shorelines are shown in Figures A5 

 and A6, respectively. 



Construction of the project was complete in July 1991 with the final 

 placement of beach fill. The completed project shoreline area is shown in 

 Figures A7 and A8. 



Post-Construction Monitoring 



Monitoring of the project was initiated with a topographic/bathymetric 

 survey of the project area prior to construction. Post-placement surveys of 

 beach fill acceptance reaches were completed on July 8, 1991. Post- 

 construction beach surveys were completed on September 28, 1991, and 

 November 17, 1991. The purpose of these surveys was to monitor the 



A14 



Figure A4. Breakwater construction procedure 



Appendix A Case Design Example of Detached Breakwater 



