and was discharging 5 c.f .3. The water temperature was 36.5°F, 

 at the upper terminus of the survey. The gradient is moderate 

 to fairly steep, with numerous small falls and cascades Small 

 shallow riffles providing a limited amount of good spawning area 

 were found to begin at a point about 1/2 mile above the mouth 

 and continuing upstream, interspersed with pools and cascades. 

 It was estimated that there were 17,500 sq. yd of medium and 

 small rubble, constituting 7U percent of the total bottom in the 

 section surveyed, A large part of this medium and small rubble 

 comprised soi table salmon spawning area 



There are four small irrigation diversions on the South 

 Fork. None was in use at the time of observation, and none was 

 provided with screens to prevent the loss of fish. 



A log jam h feet high was found about 1 mile above the 

 mouth. This jam was considered to be a barrier to fish except 

 at high water stages. 



The South Fork formerly supported a good run of steelhead 

 trout and a reasonably good run of chinook salmon for the small 

 size of the stream It was reported that in recent years no 

 chinooks have been seen in the stream, and it is probable that 

 the salmon have been exterminated, due mainly to conditions in 

 lower main Asotin Creek. Still more recently the steelheads have 

 become very scarce. Resident trout are numerous, excellent catches 

 of rainbow and Dolly Vardens being reported. The scieening of 

 the irrigation diversions, the removal of the log jam, and some 

 other slight stream improvements would enable the stream again to 

 support a good run of steelhead trout, 



11, Tenmile Creek ,— (April 26, 1937; Hanavan.) Tenmile 

 Creek enters the Snake River approximately 151 miles above the 

 mouth and extends for about 20 miles. At the time of observation 

 it was discharging about 6 c,f,s, at the mouth « During the summer 

 months it is practically dry except for a few permanent pools. The 

 water temperature was 65°F, at the mouth. The stream course ex- 

 tends almost entirely through a narrow, rocky canyon. The gradient 

 is uniformly steep, with cascades instead of riffle areas. The 

 stream bed is composed mainly of large and medium rubble, with 

 practically no suitable salmon spawning area, Tenmile Creek is of 

 no present or potential value to salmon, and it is questionable 

 whether it is of any value to steelhead trout* Some resident 

 trout and rough fish are found in the permanent pools. 



12, Couse Creek , — (April 26, 1937? Hanavan.) Couse Creek 

 enters the Snake River approximately 158 miles above the mouth and 

 extends for about 10 miles. At the time of observation it was dis- 

 charging about 3 c.f .s, at the mouth, but during the summer months 

 it becomes practically dry. The gradient is 3teep, and the stream 



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