25-0. Spring Valley Creek .— Enters the Vifillaniette River approxi- 

 mately 70 miles above the mouth. This small stream meanders in the 

 Willamette Valley floor for a distance of about 6 miles. It is of no 

 value to migratory f ishj, and was not surveyed. 



25P. Mill Creek . — Enters the Vi'illamette River at Salem, Oregon, 

 approximately 80 miles above the mouth, and is 25 miles long. The dis- 

 charge of record ranges from no flow to 1,110 c.f.s., with mean flows 

 of 135-250 c.f.s o 



This stream has a large power diversion just above the mouth and 

 many unscreened irrigation diversions. The stream in itself vrould be 

 unimportant to salmon, but the fact that the unscreened Salem Ditch j 

 entering IS miles above the mouth, diverts the major portion of the 

 North Santiam River diu*ing part of the year into Mill Creek makes the 

 latter of great importance to salmon and steeUiead. IJearly the entire 

 salmon and steelhead ])roduction of the North Santiam River occurs above 

 the Salem Canal, and a large number of dovmstream salmon and steelhead 

 migrants, both natural and hatchery produced, are thus subjected to un- 

 due hazards. 



25Q. Rickreall Creek . — (Not surveyed) Enters the Willamette 

 River approximately 85 miles above the mouth. The stream is about 25 

 miles long. Although it is generally a fair sized stream„ 15-25 feet 

 wide, and contains some spawning area, it is of no importance to 

 salmon. 



25R. Luckiamute River . — (Not surveyed) Enters the Willamette 

 River approximately IO3 miles above the mouth. The main stream is 

 about 50 miles long. The discharge of record ranges from 25 c.f.s., to 

 more than 14,000 c.f.s., T^ith a mean annual discharge of 848 c.f.s. In 

 the lower part of its course on the IVillamette Valley floor the stream 

 is sluggish and the bottom is mud covered, with no suitable salmon 

 spawning area. The stream was considered of little possible value to 

 salmon. The Little Luckiamute, River , entering 14 miles above the mouth 

 and extending 21 miles ^ is the principal tributary. 



25s. Santiam River . — August 2-3, 1940 j Parkhurst, Bryant, Fi'ey, 

 and Zimner.l Enters the Willamette River approximately 104 miles above 

 the mouth. The river enters the Vfillamette through two channels one 

 mile apart, the upper or south channel being the larger. The north 

 channel is sometimes designated as the Little Santiam River. These 

 channels converge less than 3 miles above the laouth. The main stream 

 is 11 miles long, and was completely surveyed. The disc?iarge ranges 

 from a minimum of 260 c.f.s., in late August, 1940^ to a maximum of 

 176,000 c.f.s., on November 21, 1921. The discharge at the time of sur- 

 vey was 418 c.f.s. The maximum run-off, always high in spring due to 

 heavy mountain snovf melt, has been increased in recent j'ears by extensive 

 timber cutting on the upper watershed. The Iotj flow in late summer is 

 caused by the withdrawal of large volumes of water from tributaries for 



47 



