625 



of Inscallaclon and external forces acting on It. 



Pipeline plastic material would be selected on cost, durability, life, freedom 

 from slim and algae growth buildup and other factors. Polybutelene looks 

 promising. 



Pump design muse consider chat no fish damage is allowed due to impeller 

 contact with the smolts, and an effort should be given to distributing the 

 pressure changes within a module to reduce damage to fish. At the same time 

 reasonable pump efficiency should be obtained. These trade offs will call for 

 pump evaluation tests which could proceed in a hydraulics laboratory in 

 advance of field pipeline tests. 



This system will have a ready backup in place with the powerplant screening 

 and collection facilities. If any pipeline reach becomes inoperable for any 

 reason, the smolts would be discharged to the reservoir. Pumps within a 

 module would be in multiple units and failure of any one would not cause 

 pipeline shutdown. 



System data such as flow, dissolved oxygen levels and pressures will be 

 transmitted to key operation points, probably the powerplant control rooms. 

 Control of pump motor speed, valves and other items would also be remotely 

 operated and indicated. Computer control of pipeline operation would be 

 provided for all reaches. 



