The homing ability of adult fish that were captured during their seaward migration asjuveniles and then transported downstream (from Ice Harbor Dam to Bonneville Dam) was notdiminished. Data from returning adults indicated survival of adult fish that had been transporteddownstream as juveniles was higher than that of fish not transported. The percentage ofincreased survival ranged from 50 to 300% depending on the river environment during the time oftransport. Information on the timing of the seaward migration and the extent of mixing of seawardruns of spring and summer Chinook salmon, (Oncorhynchus tshawytscha), was also obtained.