United States Department of the Interior, Douglas McKay, Secretary 

 Fish and Wildlife Service, Albert M. Day, Director 



TRIAL OF DENIL-TTPE FISH LADDER ON PACIFIC SALMDN 



by 



Leonard A. Fulton and Harold A. Gangmark 

 Fishery Biologists 



and Scott H. Bair 

 Hydraulic Engineer 



Special Scientific Reports Fisheries No. 99 



