There are several small tributaries to Blue River which may con- 

 tain seme additional salnon s^jaiming area, Sirmionds Ore en. ,, entering 

 1^ miles above the mouthy is about 4 miles long and was discharging 

 about 2 c.f rS. The North For k, entering approximately 2 miles up- 

 stream, is about 5 miles long and lias a small tributary,, Quart z Creek 

 entering 1/S mile upstreamo The North Fork v/as discharging 3<,b CofoSoj, 

 the temperature was 60° Fo,, the gradient is moderate x,o faii^ly steep, 

 and contains considerable large rubble and bedrock. Trout ut.ilize this 

 stream during the springy but drop back into Blue River during the sum- 

 mer low wat-er period. Lookout Creek , entering Ss niiles upsT^ream,, is 

 formed by the confluence of McRae and Ifeck Creeks, and is 3^ miles long,. 

 It was discharging 24 CofoS.,, the temperature was 56-58^^F. ^ and the 

 gradient is fairly steep. Three 6-9 foot falls in the lower l|- miles 

 are impafa-,... ole at low iratero Spawning area is limited because of a 

 Viigh p-erceatage of large rubble and the stream could accommodt^te only 

 a few salmon o A large number of smal.l rainbow trout were obsei'ved. 

 Moia Creek , entering 400 ^iards farther upstream, had a flow of 2 CofoSo 

 Tidbits Creek , 6-^ miles upstream, had a flow of 8 CofoSo Cook Creek, 

 at the upper end of the survey., had a flow of 3 CcfcS, 



25DD~(i6), South Fork, McKenzie River .— ^August IS-W^, 1937^ and 

 July 20„ 1938^ Hanavan and Langton.) Enters the McKenzie River ap=- 

 proximax^ely 58 miles above the mouth. The stream is 30 miles long,, of 

 which the lower 26 miles were surveyed. River flows were as follows s 

 300 c.f.So, at the mouthy I65 c.f.s., below Roaring Ri\rer,, 20|- miles 

 upstream^ 110 cf.s.j at Frj^sel Cross ing^ just above j and 40 Cef.s., 

 at the upper end of the survey. The water temperature -was 53° F._, in 

 the lower 7^ miles,, and vjas 46^ F„^ at the upper end of t,he survey on 

 July 20 i, 19380 The gradient in the lower I5 miles vra.s estimated 50=60 

 feet per mJ-le-, and in the next 11 miles was 70-100 feet per mile. 



The lower 22 miles of the river f Ioyj-s through a heavily wooded 

 and swampy flood plain, entering the McKenzie through several channels » 

 Multiple channels are common along most of the course. The remainder 

 of the TTCitershed is mountainous and densely forested,, the river valley 

 being narrow and often canyonous. 



The only obstructions found in the stream were twc difficult log 

 jam£ I the first 23'2 miles above the mouthj and the second 30C yards 

 farther upstreamo 



Large, well sheltered resting pools are fairly numerous through- 

 cut. The best spawning areas appear to be in the secondary channels 

 betifreen Dutch Oven Camp and Fr'issel Crossing^ 15-20 miles upstream j, 

 where there are xong sections of uniformly small gravel. There is 

 spawning area availaole for at least 13.,,000 salmon. However^ only a 

 -'iriall pcr&lon of the salmon spav/ning area is utilized. The sur'vey 

 party observed 30-40 adult spring chinooks in a large resting peel 7 

 miles above the mouth. These fish had escaped from the Oregon hauchery 



