Stop 



H mo ,H 



Cumulative Number of Stones Displaced 



Lakeside 



Harbor Side 



1 



15.6 











2 



17.2 



1 



1 



3 



18.6 



3 



4 



4 



19.9 



4 



7 



5 



21.0 



4 



9 



6 



22.4 



4 



9 



7 



23.1 



5 



11 



Following completion of the first test, the structure was rebuilt and retested 

 with the following results: 



Step 



// ma , ft 



Cumulative Number of Stones Displaced 



Lakeside 



Harbor Side 



1 



15.6 



2 







2 



17.2 



2 







3 



18.6 



2 







4 



19.9 



2 







5 



21.0 



2 



2 



6 



22.4 



2 



2 



7 



23.1 



5 



5 



As evidenced above, initial and repeat test results were similar. Photos 13-15 

 show the structure after the initial test. 



Transmission tests of Plan 1 A2 



Plan 1A2, with its totally random placement, was more porous than the 

 previous structures. Consequently, one would expect to see an increase in 

 transmitted wave energy. Tests conducted with the same incident conditions 

 used on the previously investigated plans yielded the following results: 



T p . sec 



Hj. ft 



//,-ft 



c, 



7.0 



10.2 



1.9 



0.19 



9.0 



6.9 



1.5 



0.22 



11.6 



15.6 



4.3 



0.28 



Chapter 3 Tests and Results 



