Table 5.— Distribution of passage times of individual ohinook salmon, sookeye salmon, and steelhead trout in the 

 O.g-m.-diameter pipe system with abrupt and gradual changes in illumination from pool to pipe at water velocity 

 of 0.6 m.p.s., June-July 1963 



Time interval 



Minutes 



0.0- 1.9 



2.0- 3.9 



<i.O- 5.9 



6.0- 7.9 



8.0- 9.9 



10.0-11.9 



12.0-13.9 



14.0-15.9 



16.0-17.9 



18.0-19.9 



20.0-21.9 



22.0-23.9 



24.0-25.9 



26.0-27.9 



28.0-29.9 



30.0-31.9 



32.0-33.9 



34.0-34.9 



35+ 



Total number of fish 



Median ( minutes) 



Lower limit median-"- 



Upper limit median-*- 



Percentage that completed 

 passage 



Summer chinook salmon 



June 17 to 20 



Abrupt light 

 change 



Gradual light 

 change 



Number of fish 



4 

 11 

 4 

 6 

 1 

 2 

 1 



1 

 1 

 1 



32 

 4.1 

 3.4 

 7.2 



100 



31 

 3.7 

 2.5 



6.0 



100 



Sockeye salmon 



July 13 to 16 



Abrupt light 

 change 



Gradual light 

 change 



Number of fish 



10 

 2.6 

 1.8 

 8.1 



100 



14 

 2. 

 1. 

 6. 



100 



Steelhead trout 



July 13 to 16 



Abrupt light 

 change 



Gradual light 

 change 



Number of fish 



3 



18 

 6 



1 

 1 



2 

 12 

 3 

 3 



29 

 3.0 

 2.4 

 3.8 



100 



21 

 3.3 

 1.9 



7.5 



100 



95 percent confidence intervals about the median. 



Table 6. — Distribution of passage times of individual chinook salmon, sookeye salmon, and steelhead trout through the 

 4.3-m. introductory pool of the 0.3-m. -diameter pipe with and without a truncated entrance cone, May-August 1964 



Time 

 interval 



Spring Chinook salmon 



May 7 to 10 



Velocity {1.3 m.p.s.) 



Without 



cone 



Sujumer chinook salmon 



June 29 to July 3 



Velocity (0.9 m.p.s.) 



Without 

 cone 



Sockeye salmon 



June 29 to July 3 



Velocity (0.9 m.p.s.) 



Without 

 cone 



With cone 



Steelhead trout 



July 31 to Aug. 5 



Velocity (1.3 m.p.s. 



Without 

 cone 



Minutes 



Number of fish 



Number of fish 



Number of fish 



Number of fish 



0.0- 

 2.0- 

 4.0- 

 6.0- 

 8.0- 

 10.0- 

 12.0. 

 14.0- 

 16.0- 

 18.0- 

 20.0- 

 22.0- 

 24.0- 

 26.0- 

 28.0- 

 30.0- 

 32.0- 

 34.0- 

 36.0- 

 38.0- 

 40.0- 

 42.0- 

 44.0- 

 45+., 



• 1.9 



■ 3.9 



■ 5.9 



■ 7.9 



■ 9.9 

 ■11.9 

 ■13.9 

 ■15.9 

 ■17.9 

 ■19.9 

 ■21.9 

 ■23.9 

 ■25 

 ■27 

 ■29 

 ■31 

 ■33. 



30 

 7 

 2 



1 



17 

 2 



38 

 5 



48 



10 



1 



2 



35.9 



37.9 



39.9 



41.9 



■43.9 



■44.9 



Total niunber of fish. 



Median (minutes) 



Lower limit median-"-.. 

 Upper limit median^ . . 

 Percentage that 



completed passage.. 



88 



96 



91 



100 



82 



100 



95 percent confidence intervals about the median. 



10 



