UNITED STATES DEPARTMENT OF THE INTERIOR 



Stewart L. Udall, Secretary 



John A. Carver, Jr., Under Secretary 



Stanley A. Cain, Assistant Secretary for Fish and Wildlife 



FISH AND WLLDLIFE SERVICE, Clarence F. Pautzke, Commissioner 



Bureau of Commercial Fisheries, Donald L. McKernan, Director 



Laboratory Evaluation of the 1-on-10 Slope Ice 

 Harbor Fishway Design 



By 



CLARK S. THOMPSON and JOSEPH R. GAULEY 



United States Fish and Wildlife Service 

 Special Scientific Report--Fisheries No. 509 



Washington, D.C. 

 June 1965 



