DRAINAGECMODIFICAJIONS 



WASHINGTON'S ADJACENT: COUNTIES' 

 W.G.Tioht 



LeOietld Present Drainage Lines, 



' freqlacial Drainage Li net 



County Lines 

 Preqfaclal Cols 

 Preglacial Valley F/oors -s 

 Scale ml. f ' . V . *, r—r~ 



PLATE 1. 



