is approximately 6 miles long, of v/hich the lower mile is a tidal 

 slough. It was surveyed up to a falls 6 feet in height located 

 about 3^ miles above the mouth, and wliich is a barrier at low water. 

 The stream was 15 feet wide and vias discharging only 1 c.f.s. The 

 gradient is mostly moderate. There is spavming area belovif the falls 

 for about 200 pairs of salmon. A few small log jams and beaver dams 

 were found in the section surveyed. These are probably passable at 

 high water. An impassable 50 foot high reservoir dam and diversion 

 for the City of Astoria donestic water supply is located about 5 

 miles above the mouth. The only tributary of any value is Little 

 Bear Creek, entering about l-g- miles above the mouth and discharging 

 about 1/2 c.f.s. The stream bed above the confluence of Little Bear 

 Creek was practically dry at the time of observation. It was re- 

 ported that small runs of silver and chum salmon enter the stream 

 late in the fall v/hen the flow is considerably higher. The stream 

 is probably passable up to the Astoria water supply dam at high water 

 stages . 



8. Big Creek . — (August 1, 19AA and October 17, 19455 Bryant, 

 Brewington, Davis, and Johanson). Enters the Columbia River about 

 23 miles above the mouth through Knappa Slough. The stream is ap- 

 proximately 13 miles long, of vfhich the lower 1/2 mile is a tidal slough. 

 It was surveyed for a distance of 92 miles above the mouth. The stream 

 was about UO feet wide, and was discharging 11 c.f.s. at a low-^vater 

 stage. The vrater temperature was 45-48° F., and the stream gradient 



is moderate. 



An Oregon State Fish Commission hatchery is located 3 miles above 

 the mouth, and the hatchery racks block the stream at this point. 

 Temporary racks also are installed just above tidev/ater 1/2 mile above 

 the mouth during the fall season. There is suitable spavming area for 

 at least 1,000 fish below the hatchery and 2,500 above. A few steel- 

 head pass above the hatchery racks during the spring high water period. 

 The stream has fair hatchery runs of fall chinook, chum salmon, and 

 steelhead trout, and a good run of silver salmon. 



9. Gnat Creek . — (or Knapp's Creek): (Inspected May 9, 1946; 

 Parkhurst, Zimmer, Ifeltzeff, and Fulton). Enters the Columbia via 

 Blind Slough above Knappa, Oregon, and is about 9 miles long. It 

 had a flow of about 30 c.f.s. and the water temperature was 49° F. 

 The gradient is moderate to fairly steep, and there is a preponderance 

 of bedrock and large rubble providing little suitable spawning area. 



10. Plympton Creek . — (October 15, 1945; Parkhurst, Brewington, 

 Davis, and Johanson). linters the Columbia via 7festport Slough at 

 '•estport, Oregon, and is about 6 miles long. The stream was about 15 

 feet wide, discharging 5 c.f.s., and the water temperature was 48-52°Fo 

 The lower 1/2 mile is badly polluted by sawmill waste and sei/age from 

 the tovm of Westport. 



11 



