The efficiency of the eductor is some-what lower than that of an ordinary- 

 dredge pump with a suction pipe. Studies to date have failed to indicate 

 sufficient savings in construction or operating labor costs as to offset 

 the lower efficiency and show an overall saving in cost per cubic yard 

 of material moved, 



/i.16. Floating Plant . - To date no satisfactory method has been found 

 which offers any improvement on the proven methods of periodic movement 

 of beach material by hydraulic pipe-line dredge. Sand has been success- 

 fully by-passed by this type of plant at Santa Barbara, California, for 

 the last 15 years, (See Figure 13A.) 



1 



Down drift 



SANTA BARBARA 



1 1 1 



1 1 1 



Updrift 



Dischorge line^ 

 Shore linCv^ i ^' 



I Harbor Area \ 



\\\\\v 



(^Deposited 

 feeder 



--,_^ 1 /2 — Pipe- line dredge 



beach 







PACIFIC OCEAN 





FIGURE 134 - SANTA BARBARA HARBOR- SAND 



BYPASSING 



201 



