Entry 

 Tunnel 



^ 



Entrance Fishway 



^Norfh Fishway 



Exit Fishway 



c 



COLLECTION 

 POOL 



Mesh 



Borri er / 



Center Wall 



J 



Crowder Well 



Te S I 



F i s h w y 



^ 



FLOW 

 INTRODUCTION 

 POOL 



i«- Finger Trap 



Brail Release Cote , 



54' 



55 



Introductory Pool 



56' 



57 



PLAN VIEW 



58 



59 



60' 



40.0 



Collection Pool Broi 



SIDE VIEW 



- €0.8 



Flow Introduction — -^ 

 Pool Brail 



FIGURE 3. --DIAGRAMMATIC PLAN AND SIDE VIEWS OF THE TEST FISHWAY AND ASSOCIATED 

 POOLS IN THE EXPERIMENTAL FACILITY. 



figure 3. Elevations noted are relative to 

 comparable points at Bonneville Dam. All 

 elevations are expressed in height (feet) 

 above mean sea level. 



Collection, Introductory and 

 Flow Introduction Pools 



In addition to the test fishway proper, 

 the flume was partitioned into several 

 accessory pools to accommodate the fish 

 before and after their passage through the 

 test area. These were the collection pool, 

 the introductory pool, and the flow intro- 

 duction pool (figure 3). 



Fish ascending the entrance fishway 

 entered the flume by means of a portable 

 entry "tunnel", passing through this struc- 

 ture into the collection pool. This tunnel 

 (figure 4) was simply an extension of the 

 entrance fishway. Its V-shaped exit was 

 equipped with a finger trap which prevented 

 fish from backing down into the entrance 

 fishway after having entered the collection 

 pool. 



The collection pool provided an area 

 in which to contain the fish prior to their 

 release into the fishway. Pool dimensions 

 were 30 feet by 24 feet with a water depth 



of 14 feet. A brail, which could be raised 

 as desired, covered the pool bottom. A 

 picketed barrier marked the upstream limit 

 of the collection pool. This structure 

 extended 8 feet above the water surface to 

 prevent fish from jumping from the collec- 

 tion pool into the fishway introductory 

 pool. A 5-foot release gate in the barrier 

 provided access to the experimental area. 

 Water depth at the gate entrjince was 2 feet. 



After fish paissed through the release 

 gate they entered cin introductory pool 

 before beginning their ascent in the test 

 fishway. This pool was 7 feet deep, 13 feet 

 long, and varied in width from 11 feet at 

 the downstream end to 6 feet at its juncture 

 with the partition wall at the first weir 

 in the fishway. 



When the fish had completed their pas- 

 sage through the experimental fishway, they 

 entered the flow introduction pool which 

 was 37 feet long and 24 feet wide. A finger 

 trap on the upstream face of the final weir 

 (elevation 60) permitted exit but prevented 

 fish from drifting or swimming back into the 

 test area once their movements had been re- 

 corded (figure 5). Water 3 to 4 inches in 

 depth flowed over the upper surface of the 

 finger trap. 



