kO c,f .s* The water temperature was $8.0 F. The gradient is slight 

 to moderate o The stream bed contains large amounts of sand and silt. 

 There were 23,000 square yards of suitable spawning area, constituting 

 approximately 7 percent of the total bottom in the portion surveyed. 

 There is an irrigation diversion dam located 12 miles above the mouth. 

 This obstruction is 1$ feet high, has no fishway, and is impassable to 

 fisho Diiring the irrigation season 30-UO CofeSo are diverted into an 

 unscreened ditch. Part of this diversion is returned h miles below 

 the dam, but the intervening portion of the stream bed is rendered al- 

 most dry. The stream is completely inaccessible, and has little po- 

 tential value for migratory fish, 



3G-(3)a, North Fork, Gold Fork Creek, — (August 17, 1938 j 

 Wilding.) The North Fork enters Gold Fork Creek about a half mile 

 above the impassable dam, or approximately 12 J miles above the mouth. 

 The stream is about lii miles long, of which 7 miles were surveyed. 

 It is of no possible value to salmon above the terminus of the sujrvey 

 because of the steep gradient* It was 30 feet wide at the mouth and 

 discharging about 20 Cof .s. The water temperature was U7»0 F. at the 

 terminus of the survey. The gradient is moderate in the portion sur- 

 veyed, ■'■here were 53,000 square yards of suitable spawning area, con- 

 stituting approximately U5 percent of the total bottom in the portion 

 surveyed. The stream is COTipletely inaccessible. It is of no present 

 value, but has good potential value for salmon, 



3G-(1;). Lake Fork Creek , — (August 1$, 1938; Hanavan, Parkhvirst, 

 Wilding, and Morton, ) Lake Fork Creek enters the North Fork of the 

 Payette approximately 6U miles above the mouth. The stream is about 

 2U miles long, of which the upper 20 miles were surveyed. The first 

 k miles were not surveyed because in this section the stream is slug- 

 gish, and the bottom is composed entirely of sand trLih no possible salmon 

 spawning area. The discharge was about 10 c,f oS, at the mouth and 220 

 Cof,s, at the outlet of Little Payette Lake, The water temperature was 

 62-65,0 F, The gradient is slight to moderate. There is a concentra- 

 tion of good spawning area in the upper 6J miles. There were 57,000 

 square yards of suitable spawning area constituting approximately l5 

 percent of the total bottom in the portion surveyed, 



A dam 2 feet in height is located 165^ miles above the mouth, 

 and is a barrier at low water. 



An irrigation diversion dam 2 feet in height is located 1?^ 

 miles above the mouth, diverts 70 cf.s,, and is a barrier at low 

 water. 



An irrigation wing dam located 18| miles above the mouth 

 diverts 5-6 c,f,s« 



An irrigation diversion dam 2 feet in height is located 

 22^ miles above the mouth, diverts lUh c,f ,s, with the addition of 

 flash boards, and is a barrier at low water. 



55 



