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U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5164

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Figure 9. Channel changes in the South Fork McKenzie River within the Cougar Reservoir drawdown area, January 29–31, 2003, as seen from the Terwilliger Hot Springs parking area. The top, middle, and bottom photographs were taken January 29, January 30, and January 31, respectively. The sequence shows the migration of the channel away from the left bank and toward the center of the valley, with a straightening of meanders and additional downcutting.

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