UNITED STATES DEPARTMENT OF THE INTERIOR, STEWART L. UDALL, SECRETARY 



Fish and Wildlife Service, Clarence F. Pautzke, Commissioner 



Bureau of Commercial Fisheries, Donald L. McKernan, Director 



ANNUAL FISH PASSAGE REPORT - ROCK ISLAND DAM 

 COLUMBIA RIVER, WASHINGTON, 1960 



by 

 Paul D. Zimmer and Clifton C. Davidson 



United States Fish and Wildlife Service 

 Special Scientific Report — Fisheries No. 419 



Washington, D. C. 

 April 1962 



