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Scientific Investigations Report 2007–5178

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5178

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Table 4. Suspended-sediment load and yield, and clay-water volume and yield for the December 27–29, 1998, major turbidity event in the North Santiam River basin, Oregon.

[Little North values were estimated using discharge as a surrogate for instream turbidity. Abbreviations: ton/mi2, ton per square mile; Mgal, million gallons; Mgal/mi2, million gallons per square mile; N/A, no data available because station not yet established]

Station
name		 Suspended sediment   Clay-water
Load
(ton)		 Percentage of
annual load		 Yield
(ton/mi2)		 Volume
(Mgal)		 Percentage of
annual volume		 Yield
(Mgal/mi2)
Upper basin stations
North Santiam 6,240 40 29 4,710 85 22
Breitenbush 17,300 68 160 7,020 90 65
French N/A N/A N/A N/A N/A N/A
Blowout 14,100 68 540 2,550 58 98
Lower basin station
Little North 22,000 59 200 15,200 91 136

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