from 1939=>1943 inclusive, and were transferred to other streams o 

 There are no reports of salmon in Omak Creek in recent years. 

 Fair trout fishing is reported in the upper section. 



Because of the obstructions noted and the diversion of water 

 for irrigation, Omak Creek is of little present or potential value 

 to migratorj"- fish. 



I8E0 Bonaparte Creek .— (August, 1936 1 Hanavan and Whiteleather.) 

 Bonaparte Creek enters the Okanogan River approximately 55 l/2 miles 

 above the mouth, at Tonasket, Washington. The stream extends for more 

 than 25 miles to its source in Bonaparte Lake. The watershed is hilly, 

 with barren sagebrush covered land and a few irrigated ranches in the 

 lower section, and open pine forests along the upper reaches. The 

 stream gradient is moderate. The earth banks have covered the stream 

 bed with a large amount of mud and sand. Practically the entire 

 flow is utilized for irrigation, and little water ever reaches the 

 mouth of the stream. Bonaparte Creek is of no present or potential 

 value to migratory fish. 



18F. Similkameen River . — (August 26, 1936 j Hanavan and 

 Whiteleather.) The Similkameen River enters the Okanogan River 

 approximately 75 miles above the mouth, or 2 miles below Lake 

 Osoyooso It is the principal tributary to the Okanogan, the 

 greater part of its course being in Canada. The stream was 

 surveyed only for a distance of about 6 miles, up to a falls 15 

 feet high, which is at least a barrier at low water. There is an 

 impassable power dam 65 feet high located 100 yards above the falls. 

 The Similkameen is a large stream, its flow being almost three times 

 as great as that of the Okanogan at their confluence. The stream 

 was 210 feet wide at the mouth at the time of observation. Gaging— 

 station records for the water— year 1943-44 taken at a station 12 

 miles above the mouth give a maximum flow of 9,510 c.f.s., in 

 June, and a minimum flor/ of 250 c.f.s. in January. The mean 

 yearly flow was 1,475 c.f.s. The summer water temperatures are 

 high in the lower section, the temperature at the mouth on August 

 26, 1936 being 71 p. The stream gradient is moderate. The lower 

 1 1/2 miles up to the highway bridge contains a large amount of 

 good spawning area, v/ith excellent spawning riffles throughout. 

 Above this point the river extends through a steep, rocky canyon 

 for about 10 miles. In this section the streeim consists mainly 

 of large pools and cascades. The bottom consists chiefly of bedrock 

 and large rubble, and there is little possible spawning area. Brief 

 inspections of the stream in the valley section above the canyon 

 showed extensive potential salmon spawning areas. 



There is one large water diversion in the canyon above the 

 power deun. This ditch withdraws more than 100 c.f.s. for irrigation 

 use in the Okanogan Valley near Oroville, and is unscreened. 



The low wing dam in connection with the diversion would not be 

 an obstruction in the event that this section is made accessible to 

 migratory fish. 



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