Area	South Fork Ten Mile
Topic	Sediment: Fines <6.4 mm (SFT 8) Upper Redwood Cr 1993-2000

 

Caption:  Percent sediment less than 6.4 mm from McNeil samples in Upper Redwood Creek (SFT8) are displayed above for the period of record (1993 to 2001). Two stations (riffles) in a study reach were sampled annually. Bars represent the average of four McNeil samples at a station and whiskers represent standard deviation and 95% confidence intervals. Fine sediment (<6.4 mm) was over levels known to impair salmonid survival in several years, including the range of all samples from 1994, 1995 and 1997. The reference value of 30% is derived from Kondolf (2000) and is indicative of 50% salmonid egg and alevin mortality. Data provided by Hawthorne Timber Company. See Info Links for more information.

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