>^- 



467 



ANNUAL FISH PASSAGE REPORT - ROCK ISLAND 

 COLUMBIA RIVER, WASHINGTON, 1962 



by Paul D. Zimmer and John H. Broughton 



Marine Biological Laboratory 



l_l BRAR Y 



WOODS HOLE, MASS. 



SPECIAL SCIENTIFIC REPORT- FISHERIES No. 467 



UNITED STATES DEPAR™ENTjOJr^J>j^ 



FISH AND WILDLIFE SERVICE 



