Table 6. — Semimonthly number and percent of sockeye salmon counted over each ladder, Rock Island 



Dam, 1964 



1/ Middle ladder closed from Oct. 14-24 in order to make repairs. 



Table 7. — Semimonthly number and percent of coho salmon counted over each ladder, Rock Island Dam, 



1964 



1/ Middle ladder closed from Oct. 14-24 in order to make repairs. 



5 



