Table 5. Number of dead ohinook salmon and steelhoad trout 

 seen floating in the Columbia River by observers 

 on the wharf of the Ellsworth cannery (approximately 

 30 miles below Bonneville dam) during the perioa 

 September 10-17, 1946. 



Totals 64 10 _!/■ y' 



l/ The average number of dead ohinook salmon seen per hour during this 

 ~ period was 0.156. No dead steelhead trout were observed. The aver- 

 age for both species was 0.156 per hour, or 2,7 per day. 



Observers with a boat were also stationed at Cape Horn^ about 

 halfway between the dam and Ellsworth to determine whether ail of the 

 floating fish drifted as far downstream as Ellsworth. During our 

 observations on wood floats, it had bsen learned that practically all 

 of the river drift at this point came within 100 feet of the Washington 

 shore, making it very easy for an observer to see dead fish float by. 

 As at Ellsworth, one man watched for the floating fish and the other 

 picked up the fish from the boat. Here, however, to prevent duplication 

 of count, the boatman tagged and replaced the fish in the river for 

 possible later recoveiyat Ellsworth. Table 6 shows that during approxi- 

 mately 52 1/2 ho^irs of observation spread over a 9 day period 11 chinook 

 salmon and 3 steelhead trout were observed. None of the tagged fish were 

 recovered below Cape Horn. 



17 



