Table 10 



Main and Stub Breakwaters 



Waianae Small -Boat Harbor, Oahu, Hawaii 



Date(s) 

 1979 



1980 

 1982 

 1984 



Construction and Rehabilitation History 



The 1 ,690-ft-long armor stone and dolosse-armored main breakwater 

 and 220-ft-long armor stone stub breakwater were completed in 

 January (Figure 23). The dolosse-armored portion of the main 

 breakwater was model tested (Bottin, Chatham, and Carver 1976) for 

 a design breaking wave height of 11.8 ft in a water depth of 

 16 ft. 



Inspection of the structure revealed that 203 of the 6,633 dolosse 

 originally placed were broken. It is estimated that 47 of these 

 were broken and left in place during construction. 



Inspection subsequent to Hurricane Iwa of November 23 revealed no 

 additional breakage of dolosse, but it is thought that a section 

 of dolosse around sta 4+00 may have slumped slightly. 



The structures looked in good condition during a 7 August 1984 in- 

 spection. Dolos breakage appeared unchanged from 1980, and the 

 slump area referred to above did not appear to pose any immediate 

 problem. There was no obvious need to implement breakwater 

 repair. 



Figure 23. Waianae Small-Boat Harbor, Oahu, Hawaii 



41 



