Natural Flooding Hazards
Important checks to consider for present and future homeowners:
Is your house:
Near an overland flow path (OFP)?
- An overland flow path (OFP) is the route taken by stormwater which becomes concentrated as it flows over the land making its way downhill following the path of least resistance towards the stormwater network, streams or out to the coast
- Houses and homes in the path of an OFP is the main contributor of flooding in North Shore City.
- In a flood plain (prone to flooding)?
- Flood plains are areas of land situated near waterways (eg a channel or stream) that become inundated with flood waters during a flood event.
- In a coastal inundation zone?
- Coastal inundation zones are the areas adjacent to the coast line of North Shore City which have a 1% risk of inundation from the sea in any one year.
Have you checked?
To see if your home is affected by the above flood hazards use our GIS Viewer accessed via the Do It Online panel on the right.
Important Considerations
Important considerations for present and future homeowners:
- Ensure that any private pipes are not connected to the wastewater system and are maintained by removing any debris and sediment to prevent blockages
- Ensure that any waterways (eg streams) on your property are well looked after
- Request a LIM before purchasing a property
- If you sell your property make sure that you relay and provide any relevant information (eg the Operations and Maintenance Manuals) of any stormwater devices on your property to the new homeowner.
Land Information Memorandum
Upon request, the council is obliged to make any information in their possession available to the public (updated when new information comes to hand).
A Land Information Memorandum (LIM) provides important information relating to the land and should be requested before the purchase of a house.
Stormwater information included on LIMs if applicable:
- Flood plains and flood sensitive areas
- Outfall constraints
- Stormwater management area (SMA)
- Public stormwater drains (in particular their location)
- Overland flow paths
- Coastal inundation area
- Records of previous reported flooding incidents
- And any other stormwater conditions about the property known to the council at the time.