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determined the maximum velocity at which small fish could keep clear 

 of a screen and also their ability to recover after being caught against 

 a wire mesh by fast flowing water. At the same time various bypass 

 arrangements were tried to recover the fish from the intake wells leading 

 to the power plant. A new type of trash pump built by the Fairbanks 

 Morse Company was found to pass most fish up to 12 inches long without 

 harming them. These experiments carried on at Antioch advanced 

 tremendously the basic knowledge necessary for large fish screen con- 

 struction. The experiments were conducted jointly by personnel of the 

 Bechtel Corporation and the bureaus of fish conservation and marine 

 fisheries. 



Two new fish ladders were completed on the Daguerre Point Dam 

 on the Yuba River which is located about 10 miles above Marysville. 

 These fishways are being used by numbers of migrating fish to gain 

 access to about 15 miles of largely barren spawning area. 



A new fish ladder on the Sutter Butte Dam which is about 10 miles 

 below Oroville was completed. Many salmon were observed using this 

 fishway within a few hours of its completion. Funds were provided by 

 the Wildlife Conservation Board both for this project and the Daguerre 

 Point ladders. 



Engineering surveys and plans have been made for fish ladders on 

 Upper Deer Creek Falls and the McCormick-Saeltzer Dam on Clear 

 Creek. Funds have been allocated for these projects by the Wildlife 

 Conservation Board, but construction permission has not been cleared 

 by all parties concerned. It is expected this work will be completed 

 during the next season. 



