











! 



T~ 



n 

























i 



! 

















' 







-V- 









i 







==^r~^\ 





















I 

 CH -3 

























































































RP - 1 























































s-CH-3 































^ 



hs 



K ^— 























, /« 



>- 1 











^^t 



^ 



Ss , 





































phrS~- {] 





































































0.42 046 



RELATIVE FREEBOARD. F' 



Figure 17. Comparison of overtopping trend curves for the Roughans 

 Point seawall with no revetment (configuration RP-1) and the 

 Cape Hatteras vertical seawall (configuration CH-3) 



Figure 18. Storm wave action against a revetment at 

 Nesh Bay, Washington, Nov 1948 



27 



