References:Big Creek (South Cascades)-20160905173742

Location: Big Creek (South Cascades) Reported by: Steve Abercrombie Date: 4 Sep 2016 Comment: Waterflow: Moderate-High Very Low Low Moderate-Low Moderate Moderate-High High Very High Extreme 0% - 40% 40% - 70% 70% - 90% 90% - 110% 110% - 130% 130% - 160% 160% - 200% >200% Very Low: Water flow should not represent any danger (class B = a2). Low: Not as fun, but should be safe even for beginners (class B/C = a3). Moderate-Low: A bit low, still fun but not very challenging (class C1- = a4-). Moderate: Challenging but not dangerous for intermediate canyoneers (class C1 = a4). Moderate-High: A bit high, quite challenging but not too dangerous (class C1+ = a4+). High: High water, only for experienced swift water canyoneers (class C2 = a5). Very High: Dangerously high water, only for expert swift water canyoneers (class C3 = a6). Extreme: Extremely dangerous high water, may be unsafe even for experts (class C4 = a7).

Historical reference pictures used in Waterflow analysis

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13 Sep 2015 Moderate	13 Sep 2015 Moderate	26 Aug 2017 Moderate	4 Sep 2016 Moderate-High	2 Jul 2016 Very High	19 Jun 2016 Extreme	13 May 2023 Extreme