Table 3. — Maximum daily counts, salmon and steelhead, 

 Rock Island Dam, 1960. 



Table 4. — Number and percent of chinook salmon counted over 

 fish ladder, Rock Island Dam, 1960 (jacks not included). 



each 



Date 



May 2-15 



May 16-31 



June 1-15 



June 16-30 



July 1-15 



July 16-31 



Aug. 1-15 



Aug. 16-31 



Sept. 1-15 



Sept. 16-30 



Oct. 1-15 



Oct. 16-29 

 Total 



Left ladder 



Number 



Percent 



Middle ladder 



Number 



Percent 



Right 

 Number 



ladder 



Percent 



Total 



702 

 1,301 



502 

 1,214 

 2,036 

 1,524 

 2,595 

 1,079 

 1,333 

 1,234 



427 



no 

 14,057 



40.67 

 35.67 

 37.30 

 53.72 

 79-41 

 81.76 

 86.90 

 78.13 

 85.61 

 81.56 

 86.97 

 82.71 

 65.48 



188 



1,847 



799 



827 



288 



146 



79 



43 



28 



32 



17 



5 



4,299 



IO.89 

 50.65 

 59.36 

 36.59 

 11.23 



7.83 

 2.65 



3-11 

 1.80 

 2.11 

 3.46 

 3.76 

 20.02 



499 



45 



219 



240 



194 



312 



259 



196 



247 



47 



18 



3,H2 



48.44 



13.68 



3-34 



9.69 

 9.36 

 10.41 

 10.45 

 18.76 

 12.59 

 16.33 

 9.57 

 13.53 

 14.50 



1,726 

 3,647 

 1,346 

 2,260 

 2,564 

 1,864 

 2,986 

 l,38l 

 1,557 

 1,513 

 491 



133 

 21,468 



