River (creek or stream) bank: in relation to a boundary means the elevations of land that contain the average flow of water within a defined channel disregarding extraordinary flows of either flood or drought.

SIMPLY:

A river that may be described as the boundary of a title defines that boundary by it's average flow of water within a defined channel; it means that if the river is in flood the boundary does not move with the flood water.

HOW WE ASSIST:

The interpretation of boundaries is an opinion that the Authorised Surveyor forms using the best available evidence that the nature of the case allows. River boundaries are rarely debateable in terms of their location; the final boundary will be as determined by the best available evidence.