IL 4. 



^ 



o 



I 



COLUMBIA R. AT BIRCHBANK,ac. YAKIMA R. AT CLE ELUM^WN 



30 r— 1 — I — I — I — I — I — I — IBV — I 1 — I t 



DESCHUTES R AT MOODY 



1* 



COLUMBIA R. AT COULEE DAM 



YAKIMA R. AT OMTANOM WN. 



6 

 s 



COLUMBIA R. AT TRINIDAD WN 



YAklMA R. AT PARKER, WW 



50 

 4o 

 30 

 «0 

 10 



10 



a 8 

 o 



O fc 

 



0.4 



COLUMBIA R. AT THE DALLES, 0R£. YAKIMA RAT KIONA.WN. 



u 



o 

 o 



o 



in 



U. go 



o 

 . 



OKANOGAN R. AT TONASWET WN. SNAKE R. AT CLARKSTDN WM- 



o 

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WENATCHE6 R. ATPESHASTIN 



UMATILLA R. AT PENDLETON 



FIG. 5 



6 



NACHES R. BELWNTIETON R. 



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 u. 



*, 



COWLITZ R. AT CASTLE RoCK WN 



LEWIS R. AT ARIEt,WN. 



AVERAGE MONTHLY 

 STREAM FLOWS 



FOR- 



PEBIOC3 OF RECORD 



TO l<1<»-6 



FROM RCFE-RENCE (■+) 



