







13 



12 



11 



° 10 

 CD 

 Z 9 



L 8 



LJ 7 



a 

 co 



5 



4 

 3 



2 

 1 









































































'/ ' 



















' 















S 

















S 

















^ 



















1&' 



















^■^ / 

























































































1 



1 1.5 2 s 



LEGEND 



10 25 51 lf< 2«t S»» 



RETURN PERIOD, YRS 





PROBABI 



E ERR 



JR UMTS 







ROUGHANS POINT INTERIOR 



PROBABLE ERROR LIMITS 



HIDE BERH 





Figure 60. Probable error of the selection process, "Wide Berm" 





























































.<% 



g It 



CD 



Z 9 



















syy 

















.X 



y> 





















~ 















*£* 







CD 





















CO 









































































2 



























































RETURN PERIOD, YRS 



STAGE FREQUENCY 



ROUGHANS POINT INTERIOR 



PROBABLE ERROR LIMITS 



UIDE BERP1 + 1FT CAP 



Figure 61. Probable error of the selection process, "Wide Berm + 1-ft Cap' 



90 



