United States Department of the Interior, Stewart L. Udall, Secretary 



Fish and Wildlife Service, Clarence F. Pautzke, Comnnissioner 



Bureau of Commercial Fisheries, Donald L. McKernan, Director. 



ANNUAL FISH PASSAGE REPORT - 



ROCK ISLAND DAM 



COLUMBIA RIVER, WASHINGTON, 1959 



by 



Paul D. Zimmer, Clifton C. Davidson, and Floyd S. Anders 



*i ■"^^Bgj'^i'sl^tsBW^^ 



*-r -Willi 



United States Fish and Wildlife Service 

 Special Scientific Report - -Fisheries No. 394 



Washington, D. C. 

 August 1961 



