(Concluded) 



T„ . sec 



Incident H mo , ft 



Transmitted H mg , ft 



c t 



9.0 



8.2 



1.4 



0.17 



9.0 



9.6 



1.6 



0.17 



9.0 



10.8 



1.8 



0.17 



11.6 



1.9 



0.7 



0.37 



11.6 



4.5 



1.1 



0.24 



11.6 



6.9 



1.6 



0.23 



11.6 



9.1 



2.0 



0.22 



11.6 



11.6 



2.4 



0.21 



11.6 



13.8 



2.9 



0.21 



11.6 



17.7 



3.8 



0.21 



11.6 



19.6 



4.5 



0.23 



11.6 



20.8 



5.1 



0.25 



Transmission results are depicted graphically in Figure 21. These data 

 show that the 1-ft transmission criterion is reached for 7-sec, 7-ft; 9-sec, 5-ft; 

 and 11 -sec, 4-ft incident waves. The 3-ft transmission criterion is exceeded 

 by 15-ft, 11.6-sec waves. 



Photos 44-46 show the structure after wave attack. A few of the 18-ton 

 overlay stones rocked or shifted in the vicinity of the swl as they sought a 

 more stable orientation; however, none were displaced. One harbor-side 

 armor unit was displaced from the existing structure. 



Plan 8 (Figure 22) consisted of adding one layer of 18-ton stone to the 

 crest and two layers of 18-ton stone to the lakeward face of the existing 

 structure. Transmission test results were as follows: 



T p ■ » ec 



Incident H mo , ft 



Transmitted H mo , ft 



C , 



7.0 



2.4 



0.4 



0.18 



7.0 



4.4 



0.7 



0.15 



7.0 



6.7 



1.0 



0.14 



7.0 



9.9 



1.2 



0.12 



7.0 



11.4 



1.5 



0.13 



9.0 



2.8 



0.7 



0.24 



9.0 



4.8 



1.1 



0.22 



9.0 



6.9 



1.3 



0.19 



(Continued) 



22 



Chapter 3 Tests and Results 



