THIRTY- SEVENTH BIENNIAL REPORT 



15 



construction of the two dams, the Fish and Game Commission provided 

 an additional $100,000 for construction work. During the summer of 

 1941 the construction was carried forAvard to completion consisting of 30 

 ponds, a 30-trough hatcher^', a spawning house and holding raceways, a 

 six-car garage and workroom, a food house witli refrigerating room, and 

 three houses for employees. 



Even during construction the use of temporary ponds and existing 

 equipment made it possible to rear and plant 793,988 trout averaging 4.5 

 inches in length. With the new facilities in use it will be possible to 

 materially increase this production both in the size and number of the 

 fish produced. 



The producton of larger trout for ]\Iono and Inyo counties, the two 

 leaders in that type of fishing in the State, was further increased in 1942 

 by the operation of the Black Eock rearing pond near Independence, see 

 Figure 2. This pond was artificially created some years ago by the City 

 of Los Angeles by the building of a dam for diversion purposes near the 





2. -Ifck"' v^i- 



Fig. 2. Black Rock Springs Rearing I'uiul, luyo Counl\'. I'hoto by 

 E. H. Vestal. 



source of the Black Eock springs. The springs have a fiow of from 12 to 

 15 c.f.s. at a temperature of 59°. In the fall of 1941 the outlet to the 

 pond was screened and 450,000 finger! ing Eainbow trout were planted in 

 this single large pond. Some risks w^ere obvioush' involved in rearing 

 such a large number of fish in a single pond but that they were justified 

 can be seen from the results obtained. During the spring of 1942 a total 

 of 274,385 Eainbow trout averaging over five inches in length and having 

 a total weight of over 36,000 pounds was planted from the pond. These 

 fish were for the most part used in stocking the heavily fished waters from 

 the foot of Sherwin grade south to Lone Pine. 



