CONTENTS 



Page 



Observations before construction of Shasta Dam 2 



Observations during salvage operations related to Shasta Dam 



(1943-46) 2 



Restoration of the runs after the 1943-46 salvage operation 4 



Success of spawning limited by water temperatures 4 



Timing of up-migration and spawning 6 



Timing of down-migration 7 



Discussion of environmental controls 8 



Literature cited 9 



iii 



