Appendix C - Code Assessment

Flood Hazard Overlay Code



                                                                                                                                            AO4.3 – Not Applicable
                                                                                                                                            Both Jirrima Crescent (southbound) and Lake Cooroibah Road
                                                                                                                                            (southbound) remain impassable during a 1 AEP Event. The
                                                                    AO4.3                                                                   proposed lots would offer a greater flood immunity than the
                                                                    Where the existing roads servicing a development provide a              existing service roads.
                                                                    specific flood immunity (as determined by the Qld Transport
                                                                    Road and Drainage Design Manual, Queensland Urban Drainage
                                                                    Manual and the Australian Rainfall and Runoff Guide), all lots
                                                                    have access to the flood free area identified in Table 8.2.6.5 that
                                                                    matches the road immunity.
PO5                                                                 AO5                                                                     AO5 – Complies
For reconfiguring a lot or operational works, development does      In the Flood Hazard Overlay, or in areas otherwise determined to        The development will not cause any loss to flood storage
not directly, indirectly or cumulatively alter the flood            be subject to the DFE or DSTE, development ensures:                     capacity or result in any changes to the hydrological regime.
characteristics external to the development site for all flooding
and inundation events up to and including                            a)    there is no loss of on-site flood storage capacity;
the DFEor DSTE based on:                                             b)    all changes to level, depth, duration and velocity of
                                                                           floodwaters are contained within the site for all flood events
                                                                           up to and including the DFE based on current climate and
 a)   current climate conditions; and                                      predicted impacts of climate change at 2100; and
 b)   incorporating an appropriate allowance for the predicted        c) there is no acceleration or retardation of flows, or any
      impacts of climate change.                                           retardation in flood warning times, elsewhere on the
                                                                           floodplain and to any overland flow paths; and
                                                                    there is no increased stormwater ponding on sites upstream,
                                                                    downstream or in the general vicinity of the site.
Resilient building design and form
PO6                                                                 AO6.1                                                                   AO6.1 – Not Applicable
Development ensures that building design and building form:         Buildings are designed to integrate well with the street level and      The site does not involve the development of new buildings or
  a) accounts for potential flood risk;                             the levels of adjoining properties to facilitate pedestrian flows and   structures.
  b) is resilient to flood events; and                              visual and physical connectivity between the footpath and
maintains a functional and attractive street address appropriate
                                                                    ground floors.
to the intended use.
                                                                    AO6.2                                                                   AO6.2 – Not Applicable
                                                                    Buildings incorporate appropriate screening to ensure that any
                                                                    under-storey is not visible from the street, where such screening
                                                                    does not impede flood water flows.