Vaidwood Falls ; 25 feet high^ is located 19 miles above the 

 mouth, and is an impassable barrier. 



No saL'iion or steelhead have been reix)rted. Chubs and suckers 

 were abundant in tne lovjer section. 



25FF-(4)ao llosby Creek .— IJune 13-16, 193S; Parkhurst and Wild- 

 ing.) Enters Rov; River J-^ miles above the nouth. The stream is 

 about 18 miles long, of which the lower 14 miles v/ere surveyed. The 

 lovrer half of the course extends through a flat valley about 3 miles 

 wide, Yfhere the stream is about 50 feet wide with a moderate gradients 

 The upper half of the course extends through a narrow mountain valley, 

 v^here the stream has an average width of about 25 feet and an in- 

 creasingly steep gradient vfith several lov;, passable falls. 



U. S. Geological Survey records from a staff gage located about 

 3 miles above the mcuth shovr a maximum flow of 7,760 c.f.s., on Decem- 

 ber 3Q, 1942, and a minimum flow of 3 c.f*3e, August 15 to September 2, 

 1940. Flovra of less than 15 Cof.s., often occur from August through 

 October. The water temperature vras 54 to 60° F. 



There is a 3-foo-t, high mill dam less tlian a mile above the mouth 

 that is considered passable except at low water. There is an irriga- 

 tion diversion dan 2 feet high located 3ti miles above the mouth tlat 

 is a barrier to fish at lov/ water. The diversion is about 1 c.foS., 

 and is unscreened. 



Although there is a considerable amount of bedrock in some sec- 

 tions of the stream, tliere are many good spavming riffle areas and rest- 

 ing pools. However,, much of the spavming area is not usable because of 

 decreased flows and high virater temperatures in the late sumraer months. 



Ho salmon vfero seen or rejwrted. Fair catches of cuttliroat trout 

 and a fev; v/hitefish were reported. Rough fish, such as chubs, suckers, 

 and cottoids were abundant in the lower section. 



25FF-(4)b. Harms Creek .- — (Not surveyed) Enters Rov/ River ap- 

 proximately 9 miles upstream. It is a small stream, discharging about 

 3 c.f.s,, and is blocked by an impassable mill dam IS feet high a short 

 distance above the mouth. 



25FF-(4)c. McCauley Creek .— (Not surve;/ed) Enters Rov; River ap- 

 proximately 11 miles above the mouth. A bedrock apron at the mouth 

 rendered the stream impassable to the upstream migration of fish at 

 the time of observation in Ilay-, 193^, although the discharge viras about 

 10 c.f.s, 



25FF-(4)d, Sliarps Creek .— (May 30 - June 2, 193C; Parkhurst and 

 i'iilding.) iSnters Rovf Riv r approximately 18 miles above the mouth. 

 The stream is 16 aniles long, of v/hich the lower 132 iiiiles were surveyed 

 and extends through a narroTf valley in a heavily v/ooded vratershed. The 



81 



