25 o Bridal Veil Creek s— 



260 Yfahkeena Cree k »-■- 



27o Multnomah Creek . — 



28o Oneonta Creek .— 



29. Horsetail Creek s-— 



3O0 Tumult Greek s— 



31 . M-sC ord Greek o— 



32. »of f ett Creek .,— ( Inspected I^&rch 21^ 194-^; Mielson)o 



These small streams enter the Columbia in the 15 mile section below 

 Ronneville Damo All of them are blocked by high and often picturesque 

 natural falls at or near their mouth, and are therefore of negligible 

 value to salmon o 



33 o Tanner Creek o-— (inspected Iferch 21^ 194-4; Nielson)o Enters 

 the Columbia River immedxately below Bonneville Dam and extends for 

 L, miles to the confluence of its two forks . It is blocked by a falls 

 over 100 feet high about 1 mile above the mouth o The stream was dis- 

 charging about 15 c.foSo Suitable sisawriing area constitutes about 

 20 percent of the total stream bottom below the falls ^ but is little 

 utilized by the fall run of chinook salmon that enters the stream, 

 since these fish are intercepted by the Oregon Fish Commission in con- 

 nection with the operation of its Bonneville Hatchery, which is located 

 on this stream. 



PART n 



•l/niAIffiTTE RIVER SYSTEM 



Introduction 



The Vfillamette River is the largest tributary to the Columbia be- 

 low the Snake River. It has a drainage basin of about 12,000 square 

 miles o The watershed is bounded on the east by the rugged Cascade 

 Mountains having an average elevation of 4,000 - 7^000 fee+.^ with a 

 number of snow-capped peaks rising to heights of 9^000 - 11,000 feet. 

 On the west the basin is bounded by the lower and more rolling Coast 

 Range vn.th a general elevation of 1.000 - 2, ,000 feet and occasional 

 peaks up to 4-, 000 feet. On the south the Willamette is separated from 

 the northern California dr-ainage by the Siskiyou Mountains, 



24 



