Attachment F - Natural Hazards Overlay Code - Flood

Attachment F – Natural Hazards and Natural Resources Overlay Code
Development Permit for Material Change of Use Transport Type 2 Carpark situated at 4 - 8 and 16 Lower Mill Road, Cooroy and
described as Lot 5 on SP213104 and Lot 7 on SP173771

Development siting and design
O17 Development provides that for all flood         S17.1 No probable solution.                      During flood events the carparking area
events up to and including the defined flood                                                         will not be accessible due to flooding of
event—                                                                                               the surrounding.
a) the safety of people on the site is protected;                                                    A flood management plan may be
b) the capacity to use land in the flood plain is                                                    prepared to document further measures to
not adversely affected; and                                                                          minimise risk including signage and
c) the risk of damage to property on the site is                                                     closure of the park      during extreme
avoided or minimised as far as practicable.                                                          events.
AND
O18 All lots have sufficient area that is above     S18.1 The minimum area above flood level         The proposed carparking area is below
the define flood event flood level or where         for each lot, is in accordance with Table        the flood level, however is unlikely to be
modelling is not available, the highest recorded    13.13; AND                                       used during extreme flood events.
flood level, to safely and adequately               S18.2 Where the existing roads servicing a
accommodate the intended use; AND                   development provide a 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 13.13 that matches
                                                    the road immunity; AND
O19 Development is undertaken in a manner           S19.1 Flood immunity for development areas       No filling proposed
that ensures—                                       is not achieved by filling land below the 1%
 a) natural hydrological systems are protected;     AEP (1:100 year ARI) flood level; or
b) natural landforms and drainage lines are         S19.2 Where modelling is not available, flood
maintained to protect the hydraulic performance     immunity for development areas is not
of waterways; and                                   achieved by filling land below the highest
c) development integrates with the natural          recorded flood level.
landform rather than modifying the landform to
suit the development;

O20 Development does not compromise the             S20.1 Development provides an effective          A flood management plan may be
safety of people resulting from residual flood      evaluation route that remains passable, with     prepared to document further measures to
risk associated with events that exceed the         sufficient flood warning time, to enable         minimise risk including signage and
defined flood event, up to and including the        people to progressively evacuate to safe         closure of the park. Due to the access
probable maximum flood.                             areas above the probable maximum flood in        road flooding the carpark is likely to be
                                                    the face of advanced flood waters for events     closed.
                                                    exceeding the defined flood event; OR
                                                    S20.2 Development provides for an area of
                                                    sufficient size and dimensions on site above
                                                    the probable maximum flood that allows for
                                                    safe congregation and refuge.
Earthworks
O21 Filling or excavation only occurs where it—     No solution provided.                            Minimal filling proposed
d) results in the protection, rehabilitation and
repair of ecologically important areas,
watercourses, drainage lines and wetlands; and
e) does not adversely impact on the overall
hydrology, hydraulics and flood capacity of the
waterway, and does not result in a reduction in
flood storage capacity.
 f) does not adversely impact on water levels on
properties elsewhere.
Flood impacts
O22 Development does not directly, indirectly       S22.1 In the Flood Hazard area, as identified    Minimal filling proposed.
or cumulatively alter the flood characteristics     on the Natural Hazards Overlay Maps, or in
external to the development site for all flood      areas otherwise determined to be subject to
events up to and including the defined flood        the defined flood event—
event based on— a) current climate conditions;      a) there is no loss of on-site flood storage
and b) incorporating an appropriate allowance       capacity; and
for the predicted impacts of climate change.         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 defined flood event based on
                                                    current climate and predicted impacts of
                                                    climate change at 2100.




Noosa Council                                                                                                                        Page 3