(Concluded) 



Tp ■ «» c 



Incident H mo , ft 



Transmitted H mg . ft 



C t 



9.0 



8.1 



1.5 



0.18 



9.0 



9.2 



1.7 



0.18 



9.0 



10.6 



1.9 



0.18 



11.6 



2.0 



0.7 



0.34 



11.6 



4.1 



1.2 



0.28 



11.6 



6.8 



1.7 



0.25 



11.6 



9.4 



2.2 



0.23 



11.6 



11.8 



2.5 



0.22 



11.6 



14.0 



2.9 



0.21 



11.6 



17.7 



3.9 



0.22 



11.6 



19.6 



4.6 



0.24 



11.6 



21.1 



5.3 



0.25 



Transmission results are depicted graphically in Figure 23. These data 

 show that the 1-ft transmission criteria is reached for 7-sec, 7-ft; 9-sec, 4.5-ft; 

 and 1 1-sec, 4-ft incident waves. The 3-ft transmission criterion is exceeded 

 by 15-ft, 11.6-sec waves. 



The stability response of Plan 8 was marginal. As shown in Photos 47-49, 

 a significant number of armor stones were displaced down the lakeward face 

 from the vicinity of the swl with six stones being removed from the structure. 

 Three harbor-side armor units were displaced from the existing structure and 

 three 18-ton armor stones were displaced from the crest to the harbor side. 



Plan 8 A (Figure 24 and Photo 50) consisted of adding one layer of 18-ton 

 stone to the crest and two layers of 10-ton stone to the harbor-side face of the 

 structure. Also, a 4-ft-thick layer of 1,000-lb stone was placed beneath the 

 10-ton, harbor-side stone. Transmission results were as follows: 



Tp ■ •«« 



Incident H mo , ft 



Transmitted H mg , ft 



c t 



7.0 



2.3 



0.3 



0.13 



7.0 



4.2 



0.5 



0.12 



7.0 



7.0 



0.8 



0.11 



7.0 



9.9 



1.0 



0.10 



7.0 



11.6 



1.4 



0.12 



{Continued) 



Chapter 3 Tests and Results 



23 



