Figure 1. — Plunging (top) and streaming (bottom) flows at the Washington shore fish- 

 way, Bonneville Dam. Note that the pool surface in the plunging flow is less turbu- 

 lent than In the streaming pool. 



We studied the performance and behavior of 

 adult Chinook salmon in plunging and stream- 

 ing flows of fishways to determine if one flow 

 was preferable over the other for fisli passage. 

 This paper reports on an experiment at The 

 Fisheries-Engineering Research Laboratory, 

 Bonneville Dam, September 12-35, 1959. 



DESCRIPTION OF TEST FISHWAY 



An experinnental "endless" fishway of pool- 

 and-overfall design with a l-on-16 slope^ 



■'a l-on-16 slope fishway rises 0.3 m. for every 4.9 m. 

 of length. 



