CONTENTS 



Page 



Introduction 1 



Salmon runs past Rocky Reach Dam site 2 



Time and size of runs passing Rocky Reach Dam site Z 



Chinook salmon..... 3 



Blueback sedmon 3 



Steelhead trout 6 



Silver salmon 7 



Rate of travel--Rock Island to Zosel Dcun 7 



Distribution of spawners in tributaries above Rocky Reach Dam 



site 8 



Chinook salmon 8 



Blueback salmon 14 



Siunmary and conclusions 14 



Literature cited 15 



FIGURES 



1. Columbia River watershed between Rock Island and Grand 



Coulee Dams iv 



2. Chinook salmon p>assage at Rock Island Deim, 1954-57 



(smoothed by 5) 4 



3. Blueback salmon counts at Rock Island Daun, 1954-57 5 



4. Steelhead trout counts at Rock Island Dam, 1954-57 (totals by 



weeks) 6 



5. Areas of spawning in the Entiat River 9 



6. Areas of spawning in the Methow River system 10 



7. Areas of spawning in the Okanogan and Similkameen Rivers 11 



8. Distribution of tagged chinook salmon above Rocky Reach Deun 



site by period of tagging at Rock Island Dam, 1954 and 1955. 12 

 9- Distribution of tagged chinook salmon above Rocky Reach Daxn 



site by period of tagging at Rock Island Dajn during 1956 13 



TABLES 



1. Totals of streami survey counts and counts of spring and summer 



chinook salmon passing Rock Island Dam - 1956 and 1957.... 



2. Spawning ground surveys above Rocky Reach Dan:i site 1956-57. 



Peak counts (live and dead) of chinook and blueback salmon . 



ui 



