UNITED STATES DEPARTMENT OF THE INTERIOR 



Walter J. Hickel, Secretary 



Russell E. Train, Under Secretary 



Leslie L. Glasgow, Assistant Secretary 



for Fish and Wildlife, Parks, and Marine Resources 



Charles H. Meacham, Commissioner, U.S. FISH AND WILDLIFE SERVICE 



Dayton L. Alverson, Acting Director, BUREAU OF COMMERCIAL nSHERIES 



Passage of Adult Salmon and Trout 



Through Pipes 



By 



EMIL SLATICK 



United States Fish and Wildlife Service 

 Special Scientific Report- -Fisheries No. 592 



Washington, D.C. 

 January 1970 



