KORTY-FIRST HIKNNIAI. KEl'OKT 



47 



ran^e and ]ar<>'e scale pvo<>faiH tlio inoclumies of oi^oi-atioii have Ix'cii 

 slow of aehieveniciit. The engineering lielp necessary for the drawing up 

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

 Wildlife Board first began to make allocations of funds. 



Detailed plans have been comph'ted for the constrnction of two fish 

 ladders on the Daguerre Point Dam oii the Yuba iiivei-. Tliis location is 

 about 10 miles above Marysville. Plans also have just been finished for the 

 construction of a fishway on the Sutter-Butte Dam on tlie Feather River. 

 This dam is located about 10 miles below Oi-oviUe. 



Figure 9. Mill Creek electric fish screen 



The fish screen shown in Figure 9 has been built at the heading of 

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

 because of its suitability for further experimentation on electrical screen- 

 ing. Electric fish stops so far have not been very successful. This screen 

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

 a truly effective electric screen may yet be produced. 



Four small wooden fish ladders were installed in gravel diversion 

 dams along the Merced River. Their effectiveness has been doubtful due 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 

 flow. Almost the total flow of the river is impounded 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 which 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 



