| 12.0 | High water level -- Class IV whitewater in Tonsina River canyon | | 11.5 | Bankfull -- stage associated with a flow (5100 cfs) having a recurrence interval of ~2 years | | 10.0 | Medium water level -- Class III+ whitewater in Tonsina River canyon | | 9.0 | Low water level -- Class III whitewater in Tonsina River canyon |
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1) 14.57 ft on 10/11/2006
2) 13.44 ft on 06/30/2000
3) 13.23 ft on 06/25/2001
4) 13.00 ft on 06/09/1998
5) 13.00 ft on 09/22/1995
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Low water records are unavailable.
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