No . Ptige 



13 Comparison of physical and chemical characteristics, 



Lake Wenatchee, Station 3 19 



14 Physical and chemical characteristics, Wenatchee River 



at Plain, Station 4 21 



15 Physical and chemical characteristics, Wenatchee River 



at Plain, Station 4 22 



16 Physical and chemicail characteristics, Wenatchee River 



at Tumwater Canyon, Station 5 24 



17 Physical and chemicad characteristics, Wenatchee River 



at Tumwater Canyon, Station 5 25 



18 Physical and chemical characteristics, Wenatchee River 



at Sleepy Hollow, Station 6 27 



19 Physical and chemical characteristics, Wenatchee River 



at Sleepy Hollow, Station 6 28 



20 Physical and chemical characteristics, Wenatchee River, 



progressing downstream from Lake Wenatchee .... 29 



LIST OF TABLES 



No . Page 



1 Precipitation in the Wenatchee Valley 6 



2 Population growth of the City of Wenatchee 7 



3 Sewage discharge to Wenatchee River 7 



4 Nason Creek — Water quality, physical characteristics, 



1955-1956 11 



5 Nason Creek — Water quality, water temperature, 1956 . . 11 



6 Nason Creek — Water quality, chemical characteristics, 



1955-1956 14 



7 Nason Creek—Water quality, 1940 and 1955-1956 14 



