1102 TJ. S. BUREAU OF FISHEEIES 



Reclamation Service; (2) field inspection and preliminary work on 

 the design of a new fish ladder for the Sprague River Dam of the 

 United States Indian Service; (3) conference with the chief engineer 

 of fishways, Canadian Government; (4) field inspection of the dam 

 sites of several proposed power developments, and the study of 

 models and designs of fish ladders for the purpose of specifying 

 the required structures of these projects. 



The Sunnyside fish ladder. — Four important runs of anadromous 

 fish journey up the Yakima River each season ; these being the spring 

 and summer runs of the chinook salmon, the steelhead, and the fall 

 run of the silver salmon. To reach the spawning beds these fish 

 must pass over the Sunnyside Dam. This concrete overfall dam has 

 a crest length of 500 feet and a height of 7.5 feet from stream bed to 

 crest, which is increased to 10 feet by the additional flashboards. 

 These flashboards are maintained in position for the major portion 

 of the irrigation season. At times of high flow the upstream migrants 

 can negotiate the jump at this dam, but with the flashboards in place 

 and under the condition of small overflow that prevails during most 

 of the irrigation season, the jump becomes impossible for most fish. 

 Realizing the unfavorable conditions existing at the Sunnyside Dam 

 the United States Bureau of Fisheries designed and constructed this 

 fall, a ladder of large pool design which has already proved itself 

 a real factor in fish conservation on the Yakima River. 



Preliminary work on Sprague River -fish ladder. — The assistance 

 of the United States Bureau of Fisheries has been sought by the 

 Oregon Game Commission to improve conditions at the Sprague 

 River Dam of the United States Indian Service, near Chilo- 

 quin, Oreg. In response to this appeal the bureau plans to construct 

 an adequate fish ladder at the site. Conditions at the site have been 

 inspected and the necessary measurements and data secured. It is 

 the intention to design and build this structure during the coming 

 summer, providing sufficient funds are available for the work. 



Study of Canadian practice. — In November, under instructions 

 from the Commissioner of Fisheries, a visit was made to Ottawa, 

 Ontario, for the purpose of interviewing the engineers engaged in 

 fish-ladder work for the Department of Marine and Fisheries, 

 Canadian Government. William Found, the departmental head, 

 and Charles Bruce, chief engineer of fishways, were most cordial in 

 placing all of the Canadian material at the disposal of the bureau's 

 engineers. 



Fish ladders at new power projects. — During the past year the 

 scope of this investigation has been considerably enlarged on ac- 

 count of obligation of the Bureau of Fisheries to specify the fish 

 ladders required at two major power developments on the Columbia 

 River. It is believed that this service is highly important. The 

 projects referred to are Rock Island development of the Washington 

 Electric Co. and the Kettle Falls development by the Washington 

 Water Power Co. 



INVESTIGATIONS IN TROUT CULTURE 



At the present time practically all the investigations in connec- 

 tion with trout culture are being carried on at the bureau's experi- 

 mental hatchery at Pittsford, Vt., under general supervision of 





