SCALE IN FEET 

 500 500 1000 FT 



BREAKWATER 

 12,050 FT LONG) 



Figure 2. Layout of Nawiliwili Harbor, Kauai, HI (to convert measure- 

 ments given in feet to meters, multiply by 0.305) 



The breakwater was monitored in 1995 through limited ground sur- 

 veys, aerial photography, photogrammetric analysis, and a broken armor 

 unit survey as part of the "Periodic Inspections" work unit of the MCNP 

 program (Bottin and Boc 1996). Very accurate base level conditions for 

 the breakwater armor units were obtained. During the monitoring, 70 bro- 

 ken or cracked concrete armor units were identified, and their approxi- 

 mate locations along the structure were documented. 



The breakwater (Figure 3) was inspected on 22 July 1998. The inspec- 

 tion indicated that most of the armor units were in similar positions as re- 

 corded during the 1995 survey based on detailed photogrammetric maps 

 of the structure. Numerous broken armor units were observed, but were 

 validated as those documented in the 1995 survey. Fragments of some of 

 the broken armor units were still in the same locations as observed in 

 1995. It was noted that the older 16,150-kg (17.8-ton) tribars are showing 

 major surface spalling of concrete (Figure 4), but this is not felt to put the 

 structure in any danger of instability. Overall the structure is in good 

 condition. 



Chapter 2 Project Descriptions and Inspection Results 



