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COLUMBIA RIVER AT GRAND COUL EE DAM 



rizi 



JAN 



FEB 



APR MAY 



JUN 



JUL AUG SEP OCT 



NOV DEC 



RANGE IN DAILY WATER TEMPERATURES 



JUNE, 1954 DECEMBER, 1956 



USE a W.S THERMOGRAPH RECORDS 



FIG. 36 



97 



