INTRODUCTION 



The purpose of the Columbia River Stream Survey has been to pro- 

 vide data for the evaluation of each stream, or portion of stream, 

 from the standpoint of Its present and potential value In relation to 

 the maintenance of the salmon resources of the Columbia River* The 

 Columbia River -watershed has been divided Into several survey areas 

 or units* This report deals with the streams in Area V, as shown in 

 Figure 1* 



Area V Includes the lower Snake River and its tributaries from the 

 mouth to the confluence of the Grande Ronde River, a distance of approx- 

 imately 170 miles along the Snake River* The major tributaries of pos- 

 sible value to salmon in this area are the Tucannon, Asotin, Clearwater* 

 and Grande Ronde Rivers* This area was formerly of great importance in 

 the production of Chinook, silver, and blueback salmon and steelhead 

 trout* Its productivity has been greatly reduced as a result of the 

 construction of dams and the diversion of water for irrigation and power* 

 The runs of blueback salmon have been exterminated, but the area still 

 retains some value as a producer of the other species* In addition, 

 the main stem of the Snake River in this area is an important migration 

 route to spawning and rearing areas farther upstream* 



Various individuals have had a part in the field work and, so far 

 as possible, the names of those who made the observations upon 'which 

 the following account is based and the dates on -which the surveys were 

 made are given in connection with the treatment of each stream* For 

 convenience a complete list of the men who were engaged in the survey 

 of Area V is given herewith t F«G. Bryant, R.E. Burrows, L.S.Christey, 

 D.G. Frey, M.G. Hanavan, W.M. Morton, Z.E* Parkhurst, R.F. Shuman, 

 A* J* Suomela, J.L. Wilding, and P.D. Zimmer* 



