FORTY-FIRST BIENNIAL REPORT 



47 



range and large scale program the mechanics of operation have been 

 slow of achievement. The engineering help necessary for the drawing np 

 of plans for large projects is now more readily available than when the 

 Wildlife Board first began to make allocations of fnnds. 



Detailed plans have bcH^n completed for the constrnction of two fish 

 ladders on the Dagnerre Point Dam on the Ynba River. This location is 

 abont 10 miles above Marysville. Plans also have jnst been finished for the 

 constrnction of a fishway on the Sutter-Bntte Dam on the Feather River. 

 This dam is located abont 10 miles below Oi-oville. 



Figure !t. Mill Creek electric fish screen 



The fish screen sliowii in Figui-c !) has been bnilt at tlie heading of 

 the Los Molinos Water Company on Mill Creek. This site was chosen 

 because of its suitability for f nrther experimentation on electrical screen- 

 ing. EU'ctric fish stops so far have not been very snccessful. This screen 

 incorporates several new ideas in its constrnction and hope is held that 

 a trnly etfective electric screen may yet be produced. 



Four small wooden fish ladders were installed in gravel diversion 

 dams along the Pierced Kiver. Their efi:'ectiveness has been donbtfnl dne to 

 lack of water at the proper time. This lack of water during the salmon 

 run is not so much due to lack of runoff' as to the mismanagement of this 

 fiow. Almost the total flow of the river is imj^ounded early in the salmon 

 season often allowing sections of the stream bed to dry up. Later when 

 the dam is full, a larger spill occurs w'hich is often damaging to both 

 small diversion dams and their fish ladders. A more extended period of 

 water release would make a great difference in the salmon production 

 potential of the Merced River. 



The Division of Fish and Game has worked closely with the U. S. 

 Bureau of Reclamation in the designing of a fish screen for the Tracy 

 pumping plant. When completed this diversion will be the largest in the 



