515 



LIBRARY 



8 1955 



Annual Fish Passage Report - Rock Island 

 Dam Columbia River, Washington, 1964 



By Paul D. Zimmer and John H. Broughton 



SPECIAL SCIENTIFIC REPORT- FISHERIES Na 515 



UNITED STATES DEPARTMENT OF THE INTERIOR 



FISH AND WILDLIFE SERVICE 

 B U REAtTcTF^OMMERaAT^IS^ERI^ 



