UNITED STATES DEPARTMENT OF THE INTERIOR 



Stewart L. Udall, Secretary 



Frank P. Briggs, Assistant Secretary for Fish and Wildlije 



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, 1963 



By 

 PAUL D. ZIMMER AND JOHN H. BROUGHTON 



United States Fish and Wildlife Service 

 Special Scientific Report—Fisheries No. 500 



Washington, D. C. 

 March 1965 



