PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 1922. 27 



no loss of eggs or fry occurred. The condition was remedied by 

 deepening the channel from the river to the intake reservoir and 

 covering exposed portions of the pipe line. 



BAKER LAKE (WASH.) STATION AND SUBSTATIONS. 

 [J. R. Russell, Superintendent] 



Fish-cultural operations were conducted at seven points in the 

 Washington field, and included the propagation of all species of the 

 Pacific salmon and the steelhead. The year's egg collections for 

 this group of stations numbered 53,978,000, and the output of eyed 

 eggs and young fish amounted to 41,113,770, all but about 6,000,000 

 of this number consisting of fish varying from 1 inch to several 

 inches in length. 



BAKER LAKE (WASH.) STATION. 



The buildings in course of construction at the Baker Lake station 

 at the beginning of the year were completed and painted. The new 

 hatchery at this point is 130 feet long by 56 feet wide, and is 

 equipped with 150 standard salmon hatching troughs, each 16 feet 

 long b}" 14 inches wide, inside measure. It has a capacity of 30,- 

 000,000 sockeye-salmon eggs, or of 25,000,000 fry when the stacked- 

 tray system is used. The construction of the fish trap undertaken 

 last season at the ou^t of Baker Lake was completed. This trap, 

 which is about 350 feet long, was formed by driving piles at 8-foot 

 intervals, beginning at each shore about 50 feet below the trap proper 

 and leading to a V-shaped point, comprising the entrance. The piles 

 were cut ofl^ at a level of 10 feet above the average water stage and 

 capped with 2 by 14 inch planks. The 4-inch mesh web used to ob- 

 struct the passage of the fish is hung from the top capping of the 

 piling and extends to the river bottom, where it is held down by a 

 heavy chain sewed to its lower edge and further reinforced by driven 

 stakes. The trap proper is a web pot, 18 by 20 feet in dimensions, 

 which is connected with the leads by a tunnel made of webbing. The 

 trap is kept in position by means of lines attached to the piling, and 

 hand windlasses are provided for raising and lowering it. Although 

 there was a slight decrease in the collection of both adults and eggs 

 of the sockeye salmon, which is the principal species handled at the 

 Baker Lake station, the results of the year's work were, in general, 

 satisfactory, both as regards losses and the condition of the fish re- 

 leased from the hatchery. 



There was no deviation from the methods of previous years in the 

 work of capturing, towing, and handling adult salmon, and during 

 the time they were held in the inclosure at the head of the lake await- 

 ing the ripening of their eggs the death rate was very low. There 

 was no loss whatever from floods, though the water stage at one time 

 attained a height of 14 feet above normal. 



Adult sockeyes were removed from the trap between the dates of 

 July 2 and August 27, the total capture comprising 7,075, of which 

 3,186 females produced the season's stock of 10,275,000 eggs. During 

 the spawning season, which extended from October 4 to November 24, 

 the fish were assorted every five days and all eggs were taken in the 



