River Safety & Trip Planning

Safety TipsRiver "Class" DefinedPotential HazardsRecommended EquipmentTrip Planning

International Scale of River Difficulty

A classification scale for swift water has been developed by the American Whitewater Affiliation. This scale rates rivers on a classification of I to VI in boating difficulty.

The scale takes into account river conditions, hazards, availability for rescue and temperatures. Most of Ohio's streams are rated Class I and II, but flooding may change the stream's rating to a higher classification. Boaters should have advanced paddling skills to attempt any stream over Class II.

Class I: few riffles and small waves; easy boating

Class II: waves up to three feet with wide channels; easy rapids

Class III: high, irregular waves with narrow passages; requires scouting and constant maneuvering

Class IV: long, difficult rapids with constricted passages in turbulent water; scouting necessary, rescue difficult

Class V: difficult, long and very violent rapids with highly congested routes; scouting must be done from shore; rescue is so difficult it presents a hazard to life

Class VI: the most dangerous rapids; boating is nearly impossible and is life-threatening

Other environmental factors may change a stream's rating to a higher classification:

  • Dam releases causing a water level of a full stream bank or out of banks (flooding). This may occur very quickly.
  • Cold weather or cold water (extra safety precautions are needed when the water temperature drops below 50 degrees F).
  • Absence of a nearby road and/or geographic terrain which makes a rescue and evacuation difficult.