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Flood Maps

State Environmental Planning Policy (Exempt and Complying Development Codes) 2008.

Development standards for flood control lots (see Flood Controls Lots Map former Holroyd (PDF, 2.35 MB) )

3.36C Development standards for flood control lots

(1) This clause applies:

(a) to all development specified for this code that is to be carried out on a flood control lot, and

(b) in addition to all other development standards specified for this code.

 

(2) The development must not be on any part of a flood control lot unless that part of the lot has been certified, for the purposes of the issue of the relevant complying development certificate, by the council or a professional engineer who specialises in hydraulic engineering as not being any of the following:

(a) a flood storage area, (see Flood Hydraulic Categories Map (PDF, 5.35 MB))

(b) a floodway area, (see Flood Hydraulic Categories Map (PDF, 5.35 MB))

(c) a flow path, (see Flood Extents Map (PDF, 5.59 MB) )

(d) a high hazard area, (see Provisional Flood Hazard Categories Map (PDF, 3.09 MB) )

(e) a high-risk area. (see Flood Risk Precincts Map (PDF, 4.99 MB) ), also refer to former Holroyd Development Control Plan for flood conditions that apply to your proposal)

 

(3) The development must, to the extent it is within a flood planning area:

(a) have all habitable rooms no lower than the floor levels set by the council for that lot, and

(b) have the part of the development at or below the flood planning level constructed of a flood-compatible material, and

(c) be able to withstand the forces of floodwater, debris and buoyancy up to the flood planning level (or if on-site refuge is proposed, the probable maximum flood level), and

(d) not increase flood affectation elsewhere in the floodplain, and

(e) have reliable access for pedestrians from the development, at a minimum level equal to the lowest habitable floor level of the development, to a safe refuge, and

(f) have open car parking spaces or carports that are no lower than the 5% flood level, and

(g) have driveways between car parking spaces and the connecting public roadway that will not be inundated by a depth of water greater than 0.3m during a 1% AEP (annual exceedance probability) flood event.

 

(4) A standard specified in subclause (3) (c) or (d) is satisfied if a joint report by a professional engineer who specialises in hydraulic engineering and a professional engineer who specialises in civil engineering confirms that the development:

(a) can withstand the forces of floodwater, debris and buoyancy up to the flood planning level (or if on-site refuge is proposed, the probable maximum flood level), and

(b) will not increase flood affectation elsewhere in the floodplain.

 

(5) If a word or expression used in this clause is defined in the Floodplain Development Manual, the word or expression has the same meaning as it has in that Manual unless it is otherwise defined in this clause.

 

(6) In this clause:

“Flood compatible material” means building materials and surface finishes capable of withstanding prolonged immersion in water.

“Floodplain Development Manual” means the Floodplain Development Manual (ISBN 0 7347 5476 0) published by the NSW Government in April 2005.

“Flow path” means a flow path identified in the council’s flood study or floodplain risk management study carried out in accordance with the Floodplain Development Manual.

“High hazard area” means a high hazard area identified in the council’s flood study or floodplain risk management study carried out in accordance with the Floodplain Development Manual.

“High risk area” means a high risk area identified in the council’s flood study or floodplain risk management study carried out in accordance with the Floodplain Development Manual.

If development is proposed on a flood control lot (see Flood Controls Lots Map former Holroyd (PDF, 2.35 MB)) is coloured:

  • Dark blue – mainstream flooding or
  • Yellow – Overland flooding or
  • Magenta – Dam failure or
  • Pink – overland flood study in progress

The lot is not an exempt and complying development and, under SEPP (Exempt and Complying Development Codes) 2008, Clause 3.36C, a private certifier may not be able to issue a Complying Development Certificate upon this parcel of land.

Stormwater and Flooding Forms