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Rock Creek Squaw Creek Luna Creek Quartz Creek Chapman Creek Harrison Creek White Creek Spring Creek O y F i g u r e 1 F i g u r e 1 G E O L O G Y O F T H E G E O L O G Y O F T H E R O C K C R E E K S U B B A S I N R O C K C R E E K S U B B A S I N W R I A 3 1 L e v e l 2 W a t e r Q u a l i t y P r o j e c t W R I A 3 1 L e v e l 2 W a t e r Q u a l i t y P r o j e c t µ Fill Flood Deposits - Sand & Silt (Quaternary) Flood Deposits - Gravel (Quaternary) Loess (Quaternary) Misc. Unconsolidated (Quaternary) Alluvium (Quaternary) Volcanics (Quaternary) Saddle Mountain Basalt (Miocene) Wanapum Basalt (Miocene) Grande Ronde Basalt (Miocene) Continental Sedimentary (Miocene/Pliocene) State Routes (WSDOT) Roads Watercourses (Ecology) Waterbodies (Ecology) Delineated Subbasins 0 28,000 14,000 Feet Dairy Canyon Box Canyon Glass Canyon Badger Gulch Luna Gulch WRIA 31 Rock Creek Subbasin