Location:	Bottleneck Canyon
Reported by:	Jakehuddleston
Date:	30 May 2021
Comment:	Final tier/rappel as seen from the road.
Waterflow:	Moderate

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Historical reference pictures used in Waterflow analysis[edit]

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1 Jul 2021 Moderate-Low	17 Jul 2021 Moderate-Low	24 Jul 2022 Moderate-Low	30 May 2021 Moderate

References:Bottleneck Canyon-20210619214340