Seaward 



Max. Design SWL 



Leeward 



Crest Width 



Breakwater Crest 



Idealized Multilayer Section 



Rock Size 

 Rock Size Layer Gradation (%) 



W Primary Cover Layer 125 to 75 



W/10 First Underlayer* 130 to 70 



W/200 Second Underlayer 150 to 50 



W/4000 Core and Bedding and Filter Layer 170 to 30 



*See Section 7.377g 



Breakwater Crest 



Crest Width 



Max. Design SWL 



Recommended Three- layer Section 



Figure 7-96. Rubble-Mound Section for Breaking Wave Condition 

 (moderate overtopping) 



7-193 



