main tributaries of the river and is subject to extreme low -water flews 

 in late summer* The gradient is moderate throughout except in the ex- 

 treme head-waters. Suitable spa-wning areas are nvimerous, riffles are 

 frequent, and resting pools are adequate. Water for domestic and irri- 

 gation purposes is diverted from the stream about 3 miles above the 

 mouth, -withdra-wing practically -the entire summer flo-w« The diversion 

 dam is easily passable during high -water, but the diversion is unscreen- 

 ed* 



The present and potential value of this stream to salmon and 

 steelhead trout is limited by the lo-w -water flo-w. 



3« Willo-w Creek » — (May 23, 19hh', Nielson.) Enters the Columbia 

 River about 11 miles above Arlington, Oregon, near Heppner Junction. 

 This is a small stream draining an extensive, semi-arid region of north- 

 central Oregon* It is largely diverted for irrigation, the entire 

 summer flo-w being -thus utilized. It has no value to salmon or steelhead 

 trout. 



19 



