increases rapidly above the tenninus of the survey. There were 9,700 

 square yards of suitable spawning area, constituting approximately 

 U percent of the total bottom in the portion surveyedo It was report- 

 ed that Marble Creek formerly supported a good run of chinook salmon » 

 No salmon were seen during the survey, and the run is now greatly de- 

 pleted. There was considerable raining pollution in the stream at the 

 time of the survey. The effect of this pollution on fish should be 

 investigated, "Die stream has some potential value as a salmon producer* 



lC-(6), Indian Creek . — (July 13-15, 19Ulj Frey and Bryant,) 

 Indian Creek enters the Middle Fork approximately 69 miles above the 

 mouth. The stream is about 22 miles long, of which the lower 13| 

 miles were surveyed. Near the mouth it was 30 ft, wide, discharging 

 119 c,f .s,, and the water temperature was $7,0°F, The gradient is 

 moderate in the lower 3 miles, and increases upstream. There were 

 17,000 3q;iare yards of suitable spawning area, constituting approximately 

 9 percent of the total bottom in the portion surveyed. Two log jams 

 were considered to be possible barriers to fish at low water, A falls 

 7 ft, in height located 11§ miles above the mouth was considered a bar- 

 rier at low water. No salmon were seen during the survey, Indian 

 Creek extends through a remote area, and the salmon rim has not been 

 subjected to molestation by man. Although it is of little or no value 

 as a salmon producer at present, it has seme good spawning area and 

 appears capable of supporting a fair run, 



lG-(7). Pistol Creek ,— (July 15-16, I9UI; Frey and Brsrant,) 

 Pistol Creek enters the Middle Fork approximately 7U miles above the 

 mouth. The main stream extends for about 3^ miles to the forks. The 

 average width of the stream was 33 ft, and the discharge at the mouth 

 was 171 c.f.s. The water temperature range was between 50 and 60°F, 

 The gradient is fairly steep throughout. There were 3,200 square 

 yards of suitable spavming area, constituting approximately 5 percent 

 of the tOytal bottom. The U, 3, Forest Service reported a run of 

 Chinook salmon in Pistol Creek during past years, but the U. S, Forest 

 Guard stationed near -the mouth reported that none had been seen that 

 season. No salmon were seen during the survey, althotigh spawners should 

 have been present at that time, A run of steelhead trout was reported 

 to enter dxiring the spring. This entire portion of the Middle Fork of 

 the Salmon River drainage system is subject to local severe flash floods, 

 which may be very destructive to salmon if they should occur at certain 

 critical stages of the reproductive period. Evidence of such floods 

 was found in Pistol Creek and several of its tributaries. Although the 

 stream is ajparently of little value as a salmon producer at present, 

 it seems capable of supporting a fair run. 



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