SEA SIDE 



LEE SIDE 



MODEL MATERIAL CHARACTERISTICS 



W, = 0.627 LB TRIBARS @ 140.4 PCF (ONE LAYER. UNIFORM PLACEMENT) 

 W 2 = 0.860 LB STONE @ 165 PCF (SINGLE ROW OF BUTTRESSING STONE) 

 W 3 = 055 LB STONE @ 165 PCF (TWO LAYERS. RANDOM PLACEMENT) 

 W 4 = 0.055 LB STONE @ 165 PCF (TWO LAYERS, DUMPED) 

 W 5 = 0.003 LB STONE @ 165 PCF (CORE) 



Figure 6. Details of 2-D toe buttressing stone test section 



the Hilo Breakwater in the US Army Engineer Division, Pacific Ocean 



(Figure 7) . 



3-D toe berm stone tests 



12. A two- layer toe berm design similar to the one used in the 2-D 

 tests was incorporated into five different 3-D test sections (Figures 8 

 and 9). Unlike the 2-D design, where the berm crest was three stones long for 



Figure 7. Tribar with toe buttressing stone and concrete 

 rib cap repair section of Hilo Breakwater, Hilo Harbor, 



Hawaii 



14 



