CHESAPEAKE BAY 



PUMP STATION 



PRE-CONSTRUCTION MLW LINE 

 NOVEMBER 1988 

 CONSTRUCTION TEMPLATE 

 MLW LINE. JULY 8,1991 

 POST-CONSTRUCTION MLW LINE 

 SEPTEMBER 28. 1991 



POST-CONSTRUCTION MLW LINE 

 NOVEMBER 17,1991 



EMBANKMENT 



Figure A9. Pre- and post-construction shorelines 



occurred since project construction. Application and results of the GENESIS 

 modeling are presented in the following paragraphs. 



GENESIS Shoreline Modeling 



Model setup 



The shoreline coordinate system established for the modeling is shown in 

 Figure A 10. The alongshore spacing selected was 12.5 ft to maximize the 

 number of cells behind each detached breakwater. This spacing resulted in an 

 average of nine cells per breakwater. Initial shoreline position data were 

 developed based on the July 8, 1991 post-fill survey of the project area. 



Appendix A Case Design Example of Detached Breakwater 



A17 



