Figures - Cont'd: 



No. Page 



40. Water quality changes in Columbia River, Beebe Orchard 



Bridge to McNary Dam 103 



41. Water quality changes in Columbia River, Beebe Orchard 



Bridge to McNary Dam 104 



42. Water quality changes in Wenatchee River, Lake 



Wenatchee to mouth 105 



43. Water quality changes in Wenatchee River, Lake 



Wenatchee to mouth 106 



44. Wenatchee River water quality comparison, 1910-11 to 



1954-57 108 



45. Wenatchee River water quality comparison, 1910-11 to 



1954-57 109 



TABLES 



1. Dam and reservoir data 3 



2. Location of sampling stations 4 



3. River characteristics 15 



4. Mean-monthly discharge of streams in study area 16 



5. Lake Wenatchee characteristics 20 



6. Water quality summary, Columbia River at McNary Dam ... 27 



7. Water quality summary. Snake River at mouth 30 



8. Water quality summary, Columbia River at Pasco 33 



9. Water quality summary, Yakima River at Enterprise .... 36 



10. Water quality summary, Yakima River above Thorp 39 



11. Water quality summary, Wenatchee River near mouth .... 42 



12. Water quality summary. Crab Creek at Beverly 45 



13. Water quality summary, Columbia River below Vantage ... 48 



14. Water quality summary, Columbia River at Rock Island ... 51 



15. Water quality summary, Nason Creek near mouth 54 



16. Water quality data, Nason Creek, by U. S. Fish and 



Wildlife Service 55 



17. Water quality summary, Chiwawa River near mouth 58 



18. Water quality summary, Wenatchee River below Plain .... 61 



19. Water quality summary, Wenatchee River at Tumwater 



Canyon 64 



20. Water quality summary, Columbia River at Beebe Orchard 



Bridge 67 



21. Lake Wenatchee water quality summary 70 



22. Lake Wenatchee water quality data collected by U. S. 



Fish and Wildlife Service 76 



