were surveyed. It was found to be inaccessible and of no value to 

 salmon above the upper teiminus of the survey because of numeroios 

 beaver dams and the small voltme of flow. Several beaver dams, 

 log ^ams, and small falls in the portion surveyed were considered 

 barriers at low water or passable only with great difficulty. 

 Near the mouth the stream was 12 ft. wide, discharging about 25 

 c.f .s., and the water temperature was U3«0°F. The gradient is 

 fairly steep in the lower portion, and increases upstream. There 

 were 2,100 square yards of suitable spawning area, constituting 

 approximately 23 percent of the total bottom in the portion sur- 

 veyed, A small run of Chinook salmon enters Trapper Creek, and 

 the stream can accommodate only a few spawners. 



lC-(3)c. Mayfield Creek .— (June 21, 19U1; Bryant.) Mayfield 

 Creek enters Loon Creek approTdmately 232 iniles above the mouth. 

 The main stream extends only 2^ miles, where it is formed by the 

 union of the east and west forks. It had an average width of 2k ft., 

 and was discharging more than 100 c.f .s. The water temperature at 

 the forks was U3»0°F. The gradient is fairly steep, with numerous 

 cascades. There were only 1,800 square yards of suitable spawning 

 area, constituting approximately h percent of the total bottom. 

 Several log jams and beaver dams were considered to be passable only 

 with great difficulty. There are three small vinscreened irrigation 

 ditches, none diverting more than 5 c,f,s. A few chinook salmon 

 and steelhead trout spawn in main Mayfield Creek, but it is not of 

 importance as a salmon producer, 



lC-(3)c-i. West Fork, Mayfield Creek ,— (June 21, 19iil; 

 Bryant,) The West Fork enters Mayfield Creek approximately 2^ 

 miles above the mouth. The stream is about 6 miles long, of which 

 the lower 2^ miles were surveyed. At the mouth it was 21 ft. wide, 

 discharging about UO c,f ,s,, and the water temperature was Ii3»0°F, 

 The gradient is steep, with ntmierous cascades. There were only 1,600 

 square yards of suitable spawning area, constituting approximately 

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

 beaver dams were passable to fish onlj"- with great difficulty. Al- 

 though a few Chinook salmon end steelhead trout were reported to 

 enter the West Fork, it was regarded as a poor salmon stream. 



lC-(3)c-ii. East Fork, Mayfield Creek .— (June 21, 19Ulj Frey.) 

 The Bast Fork enters Mayfield Creek approximately 2^ miles above the 

 Bouth. The stream is about lU miles long, of which the lower 2 miles 

 were surveyed. It was inaccessible and of no value to salmon above 

 the terminus of the survey because of a log jam and a series of beaver 

 dams* Near the mouth the stream was 18 ft. wide, discharging about 

 30 c.f.s., and the water temperature was lil4.0°F. The gradient is 

 fairly steep, except for a section of moderate gradient starting ij 

 miles above the mouth and extending several miles, which was largely 

 inaccessible. There were 3,900 square yards of suitable spawning 

 area, constituting approximately 20 per cent of the total bottom 

 in the portion surveyed. Although small runs of chinook salmon and 

 steelhead trout were reported to enter the stream, it was considered 

 of slight value at present as a salmon producer. 



17 



