Seaward 



Leeward 



Crest Width 



Breokwoter Crest 



Idealized Multilayer Section 



Rock Size Layer 



Rock Size 

 Gradation (%) 



125 to 75 

 125 to 75 

 130 to 70 

 150 to 50 

 W/4000-W/6000 Core and Bedding and Filter Layer 170 to 30 



'Crest Width 



W Primary Cover Layer 



W/2andW/15 Secondary Cover Layer 



W/10 and W/300 First Underlayer* 



W/200 Second Underlayer 



*See Section 7.377g 



Breakwater Crest 



Max. Design SWL 



^SWL (Minimum) 



Recommended Three-layer Section 



Figure 7-95. Rubble-Mound Section for Nonbreaking Wave Condition 

 (zero to moderate overtopping conditions) 



7-191 



