T_, sec 

 P 



H mo , ft Measured 



C t 



Incident 



Behind Reef 



Behind Breakwater 



7.0 



2.3 



1.1 



0.3 



0.13 



7.0 



4.1 



1.6 



0.5 



0.12 



7.0 



6.8 



3.1 



0.8 



0.12 



7.0 



9.5 



4.1 



1.1 



0.12 



7.0 



11.4 



5.0 



1.4 



0.12 



11.6 



1.9 



1.1 



0.5 



0.26 



11.6 



4.8 



2.4 



1.0 



0.21 



11.6 



6.6 



3.5 



1.5 



0.23 



11.6 



9.0 



4.6 



2.0 



0.22 



11.6 



11.4 



6.0 



2.4 



0.21 



11.6 



13.9 



7.1 



2.9 



0.21 



11.6 



17.6 



9.0 



4.1 



0.23 



11.6 



20.0 



10.0 



5.1 



0.26 



11.6 



21.8 



11.0 



5.9 



0.27 



Plan 4A1 generally produced similar but slightly reduced transmitted 

 heights relative to Plan 4A (Figures 13 and 14). Also similar to Plan 4A, the 

 reef experienced some damage with stone from the lakeward edge of the 

 crown being displaced downslope. The existing breakwater was completely 

 stable (Photos 34 and 35). 



Attached Berms (Plans 5 and 6) 



The first structure tested, Plan 5 (shown in Figure 15 and Photo 36), was 

 constructed to an elevation of -10 ft lwd. It used a crown width of 100 ft and 

 a stone weight of 5 tons. Transmission test results were as follows: 



T p . sec 



Incident H mo . ft 



Transmitted H mo , ft 



c, 



7.0 



2.3 



0.5 



0.22 



7.0 



4.0 



0.6 



0.15 



7.0 



6.7 



1.0 



0.15 



7.0 



9.2 



1.2 



0.13 



7.0 



11.8 



1.5 



0.13 



(Continued) 



Chapter 3 Tests and Results 



19 



