FORTY-FIRST BIEXXTAL REPORT 



47 



rang-e and large scale program tlic mcrliaiiies of operation have b.vii 

 slow of achievement. The engineering lu4p iiecessary for tlie drawing up 

 of plans for large projects is now more readily available tli;in when the 

 Wildlife Board first began to make allocations of funds. 



Detailed plans have been completed for the constrnction of two fish 

 ladders on the Dagnerr*^ Point Dam on the Yuba Ixiver. Tliis location is 

 about 10 miles above Marysvilh". I'lans also liave just been finished for tlie 

 constrnction of a fishway on the Sutter-r>utte Dam on the Feather Kiver. 

 This dam is h)('at(Hl about 10 miles below ( ii-oville. 



'^'^aF^,. 



FiGfRK 0. :\Iill Creek electric fi.sh .screen 



The fisli screen shown in Figure I' li;is been Iniilt at the lieading of 

 th(^ Los Molinos AYatci- Company on .Mill ("reek. This site was dioscn 

 because of its suitability for fniHiei- e.xpetiinentation on elccti-ieal sei-een- 

 ing. Eleetrie fish sto])s so far have not been very snccessrnl. 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 la(ld(M-s were installed in ;^ra\i'l diversion 

 dams along"the .Merced IJiver. Theii- effectiveness has been doubt lul due to 

 lack of water at the pi-oper time. This lack of water dui'ing the salmon 

 run is not so mueh due to lack of i-unofi' as to the mismanagement of this 

 flow. Almost the total flow of the river is impounded e;ii-|y in the salmou 

 season often allowing sections of the sti-eam bed to dry u|). i^ater when 

 the dam is full, a larger spill occurs whiidi is often damaging to i)oth 

 small diversion dams ami their fish laddei-s. A moi-e extended period of 

 water release would make a gi-eal ditVereiiee in the salmon production 

 potential of the Merced Kiver. 



The Division of Fish and (Jame has worked (dosely with the I'. S. 

 Bureau of Reclamation in the designing (tf a fish screen for tlic Tracy 

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



