T p ,—c 



H mo . ft Measured 



C , 



Incident 



Behind Reef 



Behind Breakwater 



7.0 



2.3 



1.9 



0.5 



0.22 



7.0 



4.0 



3.5 



0.7 



0.18 



7.0 



7.0 



5.6 



1.0 



0.14 



7.0 



10.0 



7.4 



1.3 



0.13 



7.0 



12.2 



8.5 



1.6 



0.13 



9.0 



3.0 



2.7 



0.7 



0.23 



9.0 



4.9 



4.4 



1.0 



0.20 



9.0 



7.0 



6.0 



1.3 



0.19 



9.0 



8.2 



6.9 



1.5 



0.18 



9.0 



9.3 



7.8 



1.7 



0.18 



9.0 



10.4 



8.4 



1.8 



0.17 



11.6 



1.9 



1.8 



0.7 



0.37 



11.6 



4.1 



3.8 



1.2 



0.29 



11.6 



6.6 



5.7 



1.7 



0.26 



11.6 



9.0 



7.6 



2.2 



0.24 



11.6 



11.4 



9.3 



2.6 



0.23 



11.6 



13.8 



10.7 



3.0 



0.22 



11.6 



17.5 



12.9 



4.2 



0.24 



11.6 



19.4 



14.2 



5.0 



0.26 



11.6 



20.3 



15.0 



5.8 



0.29 



As shown above, the transmission response of Plan 3 is essentially identical to 

 Plan 2. Both the reef (Photo 25) and the existing breakwater (Photo 26) were 

 completely stable. 



Since raising the crown elevation did not improve performance, it was 

 decided to test an additional plan with a significantly wider crown. Plan 4 

 (Figure 8) was constructed to a crown elevation of -20 ft lwd and used a 

 crown width of 150 ft. Transmission test results were as follows: 



16 



Chapter 3 Tests and Results 



