US GEOLOGICAL SURVEY, WATER RESOURCES DIVISION
Oregon District
COMPARATIVE FLOW TABLE FOR SEPTEMBER 1999
------------------- Change ------------------- ------------
Monthly mean in dis- Discharge near Accumulated
discharge charge end of month Runoff
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Cubic Percent previous Cubic Oct-Sep
feet per of month feet per Percent of
Station second average (percent) second Date Average
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John Day River 191 86 -35 199 30 128
at Service Creek, OR
Wilson River 60 40 -31 54 30 154
nr Tillamook, OR
Umpqua River 1,445 118 -12 1,390 30 145
nr Elkton, OR
Columbia River 68,120(a) 70 -69 143,000 30 118
at The Dalles, OR
Willamette River 2,934(a) 70 -43 10,100 30 133
at Salem, OR
Chehalis River 233 60 -19 217 30 159
nr Grand Mound,
Skykomish River 1,089 75 -65 802 30 131
nr Gold Bar, WA
Spokane River NOT AVAILABLE
at Spokane, WA
Snake River 5,108(a) 116 -20 4,600 30 120
at Heise, ID
Snake River 12,460 94 +1 14,100 30 125
at Weiser, ID
Salmon River 4,472 92 -32 4,370 30 116
at White Bird, ID
Clearwater River 2,661 83 -44 2,460 30 114
at Spalding, ID
Clark Fork 2,700 80 -25 2,540 30 103
at St. Regis, MT
MF Flathead River 813 78 -59 642 30 95
nr West Glacier, MT
Percent of Average computed using 30-year base period, Wtr Yrs 1961-90
(a) adjusted for upstream storage 10/06/99