Boundaries shown on deposited plans are categorised as either natural or artificial. Natural boundaries are those presented by nature. They may be defined by the shoreline of lakes or the sea, the banks of rivers and streams, or by other natural features such as a cliff face or ridgeline. The types most commonly used for parcel definition are:
- Riparian boundaries: The banks of rivers and streams.
- Littoral boundaries: The edges of lakes, lagoons and the coastline.
The survey definition of natural boundaries should be in accordance with the provisions set out in Part 2 Surveying and Spatial Information Regulation 2017.
The doctrine of accretion and erosion applies to boundaries of tidal lakes and both tidal and non-tidal streams and waterways.
The position of tidal boundaries (MHWM) should be shown on the plan in the usual manner in accordance with provisons in Surveying and Spatial Information Regulation 2012.
When a plan of survey contains non-tidal boundaries the current position of the bank should be examined by the surveyor and compared with the boundary as defined by the Crown survey.
Most alterations to the position of the MHWM or the original definition of the bank of a non-tidal stream will require the approvals and consents to natural boundaries.
Landward boundaries of roads and reserves abutting waterways and other natural features do not move parallel with any subsequent movement of the bank through accretion and/or erosion.
Special provisions apply for rivers forming NSW state boundaries.
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All NSW legislation can be accessed at www.legislation.nsw.gov.au/
Publish date: December 2023