mouth, respectively. Neither of these branches nor the main stream 

 above their confluence maintains a sufficient flow to be of value to 

 salmon. Clark Creek was discharging about 5 c.f »s. at the mouth at 

 the time of the survey. The lower two-mile section of the stream 

 has a moderate gradient and good spawning areas. About 3i miles up- 

 stream from the town of Elgin there is a low wing dam, passable to 

 fish, and a small irrigation diversion. Clark Creek is too small to 

 be of any significant value to salmon, although at higher water stages 

 it may be of some value to steelhead trout. 



13AA, Indian Creek . — (October 9, 19U0j Parkhurst and Frey.) 

 Indian Creek enters the Grande Ronde River approximately 98 miles above 

 the mouth and extends for a distance of about 22 miles. The stream 

 was 8 feet wide at the mouth and was discharging about it c.f.s. at 

 the time of the survey. It has a moderate gradient and good spawning 

 areas. The town of Elgin maintains a domestic water supply dam and 

 diversion at a point about $\ miles above the mouth. This dam is 

 9 feet high , and is provided with a poor fish ladder, which is im- 

 passable at low water stages. It was reported that no salmon enter 

 Indian Creek during the fall months, but that a few (probably steel- 

 head treat) ascend during the spring high water period. The stream 

 does not maintain a sufficient flow during the late summer and fall 

 to be of any possible significant value to salmon. 



13BB» Willow Creek ,— (October 9, 19U0; Parkhurst and Frey.) 

 Willow Creek enters the Grande Ronde River approximately 101 miles 

 abeve the mouth and extends for a distance of about 20 miles through 

 a highly cultivated region. The stream was 1$ feet wide near the 

 mouth and was discharging about 20 cf .a. at the time of the survey. 

 It has a very slight gradient, a stream bed composed almost entirely 

 of mud and sand, and no suitable spawning area. Willow Creek is of 

 little or no possible value to salmon* 



13CC. Catherine Creek .— (August 9-13» 19klj Frey and Bryant.) 

 Catherine Creek enters the Grande Ronde River approximately 135 miles 

 above the mouth. The main stream is about 30 miles long, of which only 

 the lower 9 miles are accessible to migratory fish at all times. The 

 gradient is very slight in the lower section, and the stream bed in the 

 lower 12 miles is composed entirely of mud and sand, with no suitable 

 spawning area. In the next 3 miles upstream the stream bed is so 

 heavily silted as to be of no value as salmon spawning area. Above 

 the town of Union, located about 16 miles above the mouth, the gradient 

 increases and suitable spawning areas are found. Water measurements 

 taken at the time of the survey indicated a flow of about 21 c.f.s. at 

 a point about 10 miles above the mouth. Due to irrigation diversions, 

 the flow was much greater farther upstream. Measurements taken at a 

 point about 25 miles above the mouth indicated a flow of 66 c.f.s. 

 Gaging station records of the U. S. Geological Survey, taken at a 

 station about 22 miles above the mouth, show flows ranging from a max- 

 imum flood of 1,7U0 c.f.s. in May, 19U8, to a minimum of h c.f.s. in 



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