Table 9.— Spawning areas of chum salmon in the Columbia River Basin— past and present— Continued 



Num- 



beri 



Stream 



Lengih 



Distance 

 above 

 mouth^ 



Spawning areas 



Present 



Past 



Notes 



References' 



20. Hardy Creek 



21. Hamilton 



Creek 



22. 



23. 



24. 



25. 



Rock Creek 



Herman Creek 



Little White 

 Salmon River 



Columbia 

 River 



Km. 



229 Lower portion. 



23! Lower portion. 



240 



259 



232 



Lower 0.8 km. 



Lower 1 .6 km. 



About 0.8 km. of 

 spawning below 

 hatchery rack. 



None. 



Same as present. 



Same as present. 



A falls 1.6 km. up 

 blocks run. 



A falls 1 .6 km. up 

 blocks run. 



Lower 0.8 km, inun- 

 dated by Bonneville 

 pool. 



In main stem in 

 stretch about 232- 

 248 km. above 



[Dmitti 



Has good-sized run for small area avail- 1 

 able. Apparently, eggs have good sur- 

 vival in gravel. 



This tributary has a run of chum salmon 1, 35 

 that use available area. Right bank 

 has spring-fed area that may support 

 survival. 



Small Washington stream believed to I 

 support a few chum salmon. Heavy 

 rubble and boulders but limited spawn- 

 ing areas among them. 



Occasionally, chum salmon are taken at 29 

 Oxbow Hatchery (O.F.C.). 



Some years a few chum salmon appear 1, 35 

 at the hatchery racks. A few spawn 

 below the racks. 



This species formerly used small gravel 

 in slow water near the shore for spawn- 

 ing. No information on numbers or 

 probability of survival. May have been 

 sirays from some of the tributaries. 



(*) 



^ The streams are listed in numerical sequences, proceeding upstream from the mouth of the Columbia. Streams that are direct tributaries of the Co- 

 lumbia are identified by numerals only: subtributaries are designated by a Lombination of numerals and letters. 



* Location in kilometers above mouth of Columbia or kilometers above mouth of contributing drainage. 

 ^ References are numbered to facilitate location in Literature Cited, 



* Clint Slockley, Washington Department of P'isheries. Vancouver, Wash. Personal communications, April 1968. 



1,000 



900 



8 00 



700 



600 



500 O 



(0 



o 



z 



< 



400 in 



O 



I 



300 



1900 



1910 



1920 



1930 

 YEAR 



1940 



1950 



I960 



- 200 



- 100 





 1970 



Figure 6.— Commercial catch of chum salmon 

 in the Columbia River, 1902-67. [Data 

 for 1902-36 from Craig and Hacker (1940), 

 for 1937 from Ward, Robison, and Palmen 

 (1963), and for 1938-67 from Fish Com- 

 mission of Oregon and Washington De- 

 partment of Fisheries (1968).] 



31 



