623 



The allowable density of fish in a line wich uniform flow is another factor 

 thac will Impact the feasibility of this concept. For example with a 24* line 

 flowing at 2.5 ft/sec. or 3,500 gpm and an input of 20,000,000 fish over 90 

 days the average water per fish would be 22 gallons. The importance of this 

 is unknown but high density is suspect as a problem for some species at least 

 in a near zero -flow environment of a fish tanker or barge. Field experiments 

 may shed light on this item. 



The need to add food or oxygen to the pipeline is unknown but provision to do 

 so would not be prohibitive in a prototype or final design. Dissolved oxygen 

 monitoring would be a part of the final design. 



Orientation and homing urge after a pipeline transit of several days may be 

 the most difficult to answer and may take a long duration, large test program. 

 A simple initial test for this factor should be a priority matter! 



Mortality rate in the pipeline system can be determined in the same manner as 

 with tankers or barges. A prototype test should show what to expect for the 

 full application. 



Water mix or exchange along the pipeline could be from none to lOOJ or more 

 per reach if the pumps are sized to accelerate the added water and still 

 overcome the friction losses. 



Direct collection and injection of major tributary stream smolts would be 



