Flooding and drainage FAQs
Because of major river systems and low lying topography the Port Stephens area is prone to flooding.
Flooding in Port Stephens is caused by:
- river or creek banks over flowing;
- estuary levels rising and covering foreshore areas; and
- stormwater drainage that is unable to cope causing overland flows.
Council manages land affected by flooding by:
- undertaking studies that identify flood risk and flood levels;
- undertaking floodplain risk management studies and plans that provide provisions of the management of flood prone land; and
- assessing the compatibility of new development (and major renovations) with flood risk thereby encouraging development that is appropriate to the flood risk of the area.
Common flood definitions:
The chance of a flood of a given or larger size occurring in any one year, usually expressed as a percentage. E.g. if a peak flood discharge of 500 m3/s has an AEP of 5% it means that there is a 5% chance (that is a one in 20 chance) of a 500m3/s or larger events occurring in any one year.
- Areas where the evacuation of trucks would be difficult;
- Areas where able-bodied adults would have difficulty wading to safety; or
- Areas where there is a potential for significant damage to buildings.
- A truck could evacuate people and possessions; or
- An able-bodied adult would have little difficulty wading to safety.
- high streamflow caused by an overflow from a stream, river, estuary, lake or dam,
- major excess of drainage before entering a watercourse,
- coastal inundation resulting from elevated sea levels and/or waves going over coastline defences.
- Flash flooding - is the most common type of flooding in Port Stephens. It is caused by heavy rainfall that exceeds the capacity of the drainage network resulting in flooding that happens quickly and with little warning.
- River flooding - caused by heavy rainfall in rivers that causes high water levels to spill into nearby floodplains.
- Storm surge - caused by coastal storms that result in elevated water levels, severe winds and large waves.
es. Most home building and contents insurance policies will include flood cover as a standard inclusion. However, make sure you read your Product Disclosure Statement (PDS) to know exactly what you are covered for.
Rainwater becomes stormwater once it has runoff surfaces such as roofs, paved areas, gardens and other open spaces.
- Read all information concerning stormwater drainage complaints as contained on Council's website.
- Attempted to resolve the situation by raising the issue with the owner of the property the water is coming from.
- Free call: 1800 990 777
- Describe what is occurring;
- When did it occur and on how many past occasions?
- Have you made contact with Council about this issue previously?
- What is the source on the neighbouring land that is causing the problem?
- Describe how your land and/or building are being damaged (include a written report from a suitably qualified person stating the land or building is likely to or is being damaged);
- Have you obtained professional advice as to the source of the stormwater issue?
- Have you liaised with your neighbour to address this matter?
- Have you sought advice or initiated mediation with your neighbour through the Community Justice Centre? and
- Do you have photos of the stormwater problem as it is occurring?
A catchment is an area where water is collected by the natural landscape. In a catchment, rainwater and stormwater run-off will eventually flow to a creek, river, dam, lake, ocean, or into a groundwater system. Drinking water catchments deliver water to surface water and groundwater storages.
- evidence that water has caused, or is likely to case, significant soil erosion or physical damage to a building on the other land
- surface water has been directed to and/or concentrated in a particular area by a man-made structure or drain
- surface water is the result of defective roof drainage from a dwelling or outbuilding.
- the surface water is a natural runoff from a property due to topography and isn't redirected in any manner
- surface water is flowing down existing hard surface areas such as driveways, concrete slabs or paved areas
- the location of a dwelling or outbuilding impacts on surface runoff
- surface water runoff occurs only in periods of exceptionally heavy rain
- surface water is a result of overflows from stormwater absorption pits where contours of land and lack of access prevent direct connection of a buildings roof water to Council's stormwater drainage system
- the runoff is from new development work that is the subject of a development consent and has been constructed in accordance with that consent
- the drainage problem involves discharges from defective or blocked private inter-allotment drainage easement.
- a description of the issue/s including times and dates
- describe how your land and/or building is being developed - if lives and property are at risk of being severely damaged, act immediately to impede or lessen the impact of the damage
- provide any documentation if the issue has already been reported to Council
- provide any written professional advice as to the source of the stormwater issue
- provide any information you have regarding conversations you may have had with your neighbour or any initiated mediation that has occurred
- provide any photos/videos demonstrating the stormwater issues with dates and times.
- Post: PO Box 42 Raymond Terrace, NSW 2324
- Email: email@example.com
Seepage water is the responsibility of individual property owners. Where sloping blocks have been excavated to create a flat yard or building site, seepage drains should be constructed to redirect water to a stormwater drainage system