





















/ 



}7.1% 





















/ 



\ 





40-by 



600-ft 



CHANNEL f 775.8 



1 



"^J 









/ 



--\ 





35- 



by 500 



-ft CHA 



NNEL — 



J-\ 







/ 





/ 



\ 





/ 



/ 





\ 

 \ 



Vs/ 



f 



/ 



/ 



\ 





/ 



/ 



1 



'^ \ 



^N 



\ 



4 



\ 

 \ 



V 



\ 



/ 



/ 



/ 

 / 











/ 



f 



\ 



\ 





.^-^ 



/ 











V] 



00- FT CHANNEL 



Figure 3-46. Effects of enlarged channel on shoaling at 

 Wauna-LoKer Westport Bar, Columbia River 

 Estuary (after Herrmann, 1971). 



40-by 600-ft BASE TEST 



PLAN TEST 5 aO.4%) 



^y. 



\ 



\ 



j^^v 



J- 



y 



/ 



~7^ 



\ 



/^y 



-r^ 



f 



\^' 



100- FT CHANNEL STATIONS 



Figure 3-47. Effects of improvement plan on shoaling at 

 Wauna-Lower Westport Bar, Columbia River 

 Estuary (after Herrmann, 1971). 



32 



