Table 2. --Continued 



The streams are listed in numerical sequence, proceeding upstream from the mouth of the Columbia. Streams that are direct tribu- 

 taries of the Columbia are identified by numerals only; subtributaries are designated by a combination of numerals and letters. 



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



^ References have been numbered for easy location in Literature Cited, pages 2^~2t. 



* Unpublished information provided by Forrest R. Hauck, Biologist, formerly with the Idaho Department of Fish and Game, now with the 

 Federal Power Commission, Washington, D.C. 



^ Subject to change when additional dams are built in Snake River. 



Table 3. — Estimated number of spring- and summer-run chinook 

 salmon in the Columbia River and tributaries, 1939-66.^ 



Data from Fish Commission of Oregon and Washington State 

 Department of Fisheries (1967). 



^ Includes only the Willamette River run, which was derived 

 by adding the sport catch in the Lower Willamette River, the 

 Clackamas River run (count at River Mill Dam), and the count 

 at the Willamette Falls fishway. 



^ Landings in the river fishery below Bonneville Dam plus 

 the fishway count at Bonneville Dam. 



* No estimates available. 



' Run to Willamette River included. Assumed run of 52,000 

 fish based on 10-year average (1946-55). 



are based on the commercial catches made in 

 the Columbia River plus the fish counts at 

 Bonneville Dam and the Willamette River 

 run. Since these estimates do not include fish 

 taken in the river sport fishery below Bonne- 

 ville Dam and the offshore sport fishery, the 

 spawning escapement to the Cowlitz (estimated 

 to be about 10,000 fish), and the take of the 

 commercial troll fishery (United States and 

 Canadian) in the Pacific Ocean, they must be 

 regarded as minimunn runs rather than total 

 runs. Trend lines through 1966 (fig. 2) indicate 

 improvement in spring- sumnner runs of chi- 

 nook salmon since 1939. 



Estimated average nunnbers of spring and 

 summer chinook salmon entering each tribu- 

 tary of the Columbia River are given in 

 table 4; streams with estimated populations of 

 less than one thousand fish are not included. 



Large numbers of chinook salmon are caught in the 

 ocean troll fishery, but it is difficult to determine v/hat 

 part of this catch is from the Columbia River. Tagged and 

 fin-clipped Chinook salmon from the Columbia River have 

 been recovered in the ocean during several studies, but 

 because of limited data it has not been possible to make 

 firm estimates of the total contribution from the Columbia 

 River. Rough estimates have been made, however, by the 

 Bureau of Commercial Fisheries, Columbia River De- 

 velopment Program (1960) for the 1957 run. The ocean 

 fishery caught an estimated 711,450 chinook salmon of 

 Columbia River origin in 1957 (569,000 in the commercial 

 catch and 142,450 in the sport catch), and the sport fish- 

 ery In the Columbia River and tributaries below Bonne- 

 ville Dam caught an estimated 62,080 chinook salmon. So 

 the total estimate for all runs in 1957 was 1,563,000 

 Chinook salmon. The total minimum run as shown in 

 tables 3 and 7 for 1957 is 789,428 fish or about 50 per- 

 cent of the total run. 



13 



