20A-(1). Left R)rk of North Fork Scappoose Creek . — (June 10, 19A2; 

 Parkhiirst). Enters the North Fork 4.2 miles above Scappoose Falls, and 

 therefore is inaccessible to migratory fish. It is a small, spring- fed 

 stream, discharging 2 c.f.s., and had a water temperature of 50° F, The 

 stream contains excellent spawning areas, and is heavily populated with 

 small trout. It appears to be of some potential value for the spawn- 

 ing and rearing of a small number of salmon and steelhead. 



20B. South Fbrk, Scappoose Creek . — (October 8-9, 1945; Parkhurst, 

 Brewington, Davis, and Johanson). The stream is 14 miles long, of 

 which 7 miles were surveyed. It was 7-14 feet wide, discharging 5 c.f.s., 

 and the water temperature was 55° - 57° F. The lower 3 miles consists of 

 slough area, with a slight gradient and no suitable spawning area. In 

 the next 4 miles surveyed upstream the gradient becomes moderate, and 

 there are more than 10,000 square yards of excellent spawning area, suf- 

 ficient to accommodate approximately 1,000 salmon. 



Numerous log and debris jams were found especially in the lower sec- 

 tion. Many of these obstructions appeared to be impassable to fish at 

 low Tfater stages, and should be removed. 



No salmon were observed, although a small run of silvers was re- 

 ported. The stream could support small runs of fall chinook, silver, 

 and chum salmon, as well as steelhead trout. 



21, Willamette PLiver . — (See Part II Sub-Area Willamette). 



22. Sandy River . — (j.Iarch 15-20, 1940; Hanavan and Parkhurst). 

 Enters the Columbia River about 18 miles upstream from Portland, Oregon. 

 The Sandy is about 45 miles long, most of which was surveyed. The dis- 

 charge at the mouth was estimated to be about 2,000 c.f.s. at the time 

 of observation. However, the recorded discharge ranges from a maximum 

 of 58,000 c.f.s. to a minimum of 53 c.f.s. (U.S.G.S. records). The 

 gradient is slight in the lower 2 miles, becoming generally moderate, 

 and increasing to steep in the upper section above the confluence of 

 the Zigzag River on the lower slopes of Mt. Hood. 



Jfermot Dam, owned and operated by the Portland General Electric 

 Company, is the only obstruction to fish on the main stream. This dam 

 is located 27 miles above the mouth, and is 30 feet in height. It 

 diverts water from the Sandy River into a flume and tunnel which empties 

 into the Little Sandy River immediately above another dam. The combined 

 flow of the Marmot and Little Sandy diversions is then carried by another 



1/ Craig and Suomela, A Survey of the Sandy River and its Tribiitaries, 

 1940, with Reference to Fish Ifenagement; U. S. Fish and Wildlife Service: 

 Special Scientific Report No. 14* 



15 



