REPORT OF THE FISFI AND GAME COMMISSION. 51 



Screens. 



During the last two seasons it has been very difficult to install screens, 

 owing to the drouu'ht that has prevailed all over the state for the past 

 three years, but in spite of the difficulties, we have managed to have 

 some important screens installed as well as to have others, which were 

 installed several years ago, maintained in good order. 



The large pumping plants that take their water supply from the 

 Sacramento Kiver for the rice fields have been examined from time to 

 time and it has been found that the screen.s that have been installed arc 

 very effective. Our screen inspector has made regular trips, examining 

 and reporting on the condition of all the pumping plants, ditches, and 

 canals in the different sections of the state. A large portion of his 

 time has been given to the district north of Sacramento, as this is the 

 most important field. Several types of screen are used, depending on 

 the location and general conditions. 



The majority of the owners of pumping plants and canals have met 

 our requests to screen their intakes without opposition. A few have 

 been lax in their cooperation with this Department, but we are pleased 

 to state that they are in the minority. 



Surveys and legal notices to install screens for the biennial period 



ending July 1, 1920, in the different counties, numbered 171. They 



were made as follows : 



Alpine 11 



Butte 7 



Calaveras 4 



Colusa 2 



El Dorado G 



Glenn 5 



Inyo 27 



Kern 1 



Lake 1 



Lassen 1 



Mono 28 



Placer 1 



Riverside 4 



Sacramento 6 



Sierra 2 



San Bernardino 1 



Shasta 3 



Siskiyou 41 



Stanislaus 5 



Sutter 1 



Tehama 4 



Trinity 2 



Tuolumne 2 



Yolo 4 



171 

 The follow up work by the Legal Department has been very satis- 

 factory. Very few hearings were held as most of the owners of ditches 

 and canals realize the importance of conserving the fish and as a rule 

 do not resist efforts to have efficient screens installed. 



There is one part of the present law regarding screens and fishways 

 that we would respectfully recommend the Legislature to repeal, and 



