+ 

 8 



J 



K 

 O 



O 



u 



s 



e 



o 



O 



M 



O 



O 



-I 



100 



JAN FEB MAR APR MAT JUN JUL AUG SEP OCT NOV DEC. 



COLUMBIA RIVER AT BEEBE ORCHARD BRIDGE 



Average Monthly Woter Quolity 



1956 - 1957 



FIG. 34 



69 



