624 



i}osslble If chere Is a biological advancage over picking chem up ac che nexc 

 dan downstream. 



If rest scops of large volume are needed, chey could be conscrucced near shore 

 away from che dams and eicher dikes and screens or curtain necs used to form 

 an enclosure. Terminals for Incoming and oucgoing pipelines would be needed 

 along with docking and baffling to create attraction currents to guide smolts 

 back to the pipeline after a rest. 



The relationship between pipeline velocity, needed rest areas, willingness to 

 tr?'rel day and night, and how the species differ will need biological and 

 engineering attention in arriving at a practical design. 



Engineering 



The suspension system would keep the pipeline at a depth saclsfaccory for the 

 saolts and below che expected reservoir water fluctuations. The pipeline 

 would be free between anchor points and anchor point spacing would be 

 dependant upon further engineering work and specific sice condition with 

 special attention to reservoir water velocity. The pipeline should be very 

 near neutrally buoyant but to insure stability, flotation will be needed to 

 keep the cable suspensions under tension at all times. The effect of air or 

 gas collection and differing water density due to temperatures should be 

 addressed. 



Pipeline wall thickness would be determined by maximum operating pressure 

 differencial and over pressure relief values seccings, along with che scress 



