Entrance Fishwoy 



Entry 3^ 



^ 



Channel 



Removable Mesh Le 



Release 

 Gate- 

 Boxes- 



lection 

 Pool 



Orifice Grills ^Divider Wall 



5' 56' 57' 58' 5?' 60' 



Introductory Pool p^^, v«w ChUber 



K 



Flow 

 Introduction 

 Pool 



Orifice View 

 Chamber < 



Brail 



PLAN VIEW 



^ 



EKitriihwoy 



Mead Woll Brail 



Orifice View Chomber 



El.54.( 



El. 40.0 



Plexiqioss Window 

 Flow fnrroductton^ 

 Poo< Broil 



Collection Pool Reieose ^"*'" **""* 

 Broil Gote 



SIDE VIEW 



El.61.0 



EL46jO 



Figure 1. — Diagrammatic plan and side views of the 1-on-lO-slope Ice Harbor flshway design showing temporary 

 divider wall and other structural components in the Fisheries-Engineering Research Laboratory. 



Laboratory, follows: The purposes of this 

 experiment were to provide information on 

 the performance of salmonids in the proposed 

 1-on- 10-slope fishway before constructing the 

 prototype at Ice Harbor and to develop and 

 test optional features in the design that might 

 further facilitate the passage of fish. 



EQUIPMENT AND PROCEDURE 



Laboratory 



Collins and Elling (1960) fully described the 

 Fisheries-Engineering Research Laboratory. 

 Figure 1 shows plan and side views of the test 

 fishway and adjacent laboratory facilities. 

 Principal features include a collection pool, 

 a test area, and a flow introduction pool. All 

 units are housed in a closed wooden building 

 where light conditions can be controlled. 



Collection pool .- -Fish diverted from the 

 Washington shore fishway ascended an entrance 

 fishway adjacent to the laboratory and entered 

 a collection pool 28 feet long by 24 feet wide 

 by 6 feet deep. During the tests, a wire mesh 

 brail usually confined the fish to the upper 3 

 feet of the pool. A grill at each end of the 

 collection pool retained the fish while permit- 

 ting a flow of water through the pool. 



Test area . --The test area measured 24by 70 

 feet, and the experimental fishway occupied 



most of this space. An introductory pool was 

 located at the lower end of the fish>way between 

 the collection pool and weir 54 . Release 

 boxes located on the upstream face of the 

 collection pool grill were used to pass in- 

 dividual fish and small groups of fish into the 

 introductory pool, where they began to ascend 

 the fishway on their own volition. Large groups 

 of fish were released through a 5-foot-wide 

 gate located between the two release boxes 

 (fig. 1). 



Flow introduction pool . --Water for operating 

 the fishway was piped from the Bonneville 

 forebay and discharged into the flow introduc- 

 tion pool through an adjacent diffusion chamber. 

 Sliding gate valves controlled the amount of 

 water entering the diffusion chamber. An exit 

 fishway connected to the upper end of the flow 

 introduction pool provided the fish ^vith a return 

 route to the main fishway. Water from this 

 source >vas also used for operating the test 

 fishway. 



Lighting.- -A battery of 1,000 -watt mercury- 

 vapor lamps suspended 6 feet above the water 

 surface and 6 feet apart lighted the test fishway 

 and adjacent facilities. Average light intensity 

 at the water surface was about 700 foot- 

 candles- -an intensity comparable to natural 

 lighting in the main Bonneville fishway during 

 a typical bright cloudy day. 



All weir designations are Identified In feet above mean 

 sea level. 



