Transmission results are plotted in Figure 37. These data show that the 

 1-ft transmission criteria was reached for 7-sec, 9-ft and 9-sec, 8-ft incident 

 waves. The 3-ft transmission criterion is exceeded by 14-ft, 11.6-sec waves. 



The stability response of Plan 10A was unacceptable. As shown in Photos 

 64-67, the single layer of 5-ton berm stone experienced excessive movement 

 under wave attack with resultant exposure and erosion of the 1,000-lb filter 

 stone. The existing structure's stability was little improved relative to the no 

 improvement plan, with six harbor-side blocks being displaced downslope. 



Restacking Existing Armor (Plan 1 1 ) 



Plan 1 1 (Photos 68-70) consisted of restacking the harbor-side armor 

 blocks in an area bounded by the center line and the -7-ft lwd depth. Armor 

 units were placed as close together as practical with their long axis generally 

 perpendicular to the long axis of the breakwater. Transmission test results 

 were as follows: 



T , sec 



Incident //„„, ft 

 mo' 



Transmitted W_„, ft 

 mo' 



c, 



7.0 



2.3 



0.4 



0.17 



7.0 



4.2 



0.5 



0.12 



7.0 



6.7 



0.8 



0.12 



7.0 



9.7 



1.2 



0.12 



7.0 



11.7 



1.7 



0.15 



9.0 



2.8 



0.6 



0.21 



9.0 



4.7 



0.9 



0.19 



9.0 



6.7 



1.2 



0.18 



9.0 



8.1 



1.5 



0.19 



9.0 



9.4 



1.7 



0.18 



9.0 



10.5 



1.8 



0.17 



11.6 



1.9 



0.6 



0.32 



11.6 



5.0 



1.2 



0.24 



11.6 



6.6 



1.6 



0.24 



11.6 



9.0 



2.2 



0.24 



11.6 



11.2 



2.8 



0.25 



11.6 



14.0 



3.6 



0.26 



11.6 



17.7 



5.3 



0.30 



11.6 



19.7 



6.2 



0.31 



11.6 



21.6 



7.0 



0.32 



30 



Chapter 3 Tests and Results 



