PLATES 



Plate I 



Page 

 9 



Station ±3, Columbia River at McNary Dam. 



Sxation Ik, Snake Kiver near mouth. 



Station lb, Colum'bia River at Pasco. 



Station 17, Yakima River at Enuerpxise. 



Piaxe II 



10 



Station 22, Yakima River above Thorp. 



Station 23, WenaT.cnee River near mouth. 



Station 31} Crab Creek near mouth. 



Station 38, Columbia River at Vantage. 



Plate III 



li 



Station Uo, Columbia River at Rock Island. 



Station k2, Lake Wenatchee. 



Station 43, Nason Creek near mouth. 



Station ^■h, Chlwawa River near mouth. 



Plate IV 



i2 



Station 4-5, Wenatchee River at Plain. 

 Station k6, Wenatchee River at Tiuuvater Canyon. 

 Station U7, Columbia River at Beebe Orchard. 

 Field analysis. 



Plate V 



13 



Rocky Reach Dam construction. 

 Priest Rapids Dam construction. 



vii 



