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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 ________________________________Attachment F Attachment F: Natural Hazards and Natural Resources Overlay Code Noosa Council Page 1
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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
Specific Outcomes and Probable Solutions for the Flood Hazard
Table 13.10
Column 1 Column 2 Column 3
Specific Outcomes Probable Solutions (if code assessable) Compliance
Hazardous materials
O14 Development avoids the release of S14.1 Materials manufactured or stored on- Use does not involve the storage of any
hazardous materials into floodwaters and the site are not hazardous or noxious, or hazardous materials on site.
environment. comprise materials that may cause a
detrimental effect on the environment if
discharged in a flood event; or
S14.2 Structures used for the manufacture or Not applicable
storage of hazardous materials are—
a) located above the defined flood level; or
b) designed to prevent the intrusion of
floodwaters .
Essential network infrastructure
O15 Essential network infrastructure (e.g. S15.1 Components of the essential network Proposed carparking not defined as
electricity, water supply, sewerage and infrastructure that are likely to fail or may essential network infrastructure.
telecommunications) maintains effective result in contamination when affected by
function during and immediately after flood flood water—
events. a) comply with Table 13.12; or
b) are designed and constructed to exclude
water inundation or infiltration and resist
hydrostatic and hydrodynamic forces as a
result of inundation
O16 Community Uses and Infrastructure Uses S16.1 Community Uses and Infrastructure Carparking area will not be used in times
are able to function effectively during and Uses are sited and constructed to ensure of flooding.
immediately after flood events. that floor levels comply with flood immunity
requirements specified in Table 13.12; OR Not essential community infrastructure.
S16.2 Essential community infrastructure
which is located below the specified flood
immunity requirements—
a) is designed and constructed to function
effectively during and immediately after the
recommended flood level flood event; and
b) has an emergency rescue area above the
probable maximum flood if it is for
emergency services (including emergency
shelters, police facilities, hospitals and
associated facilities).
Noosa Council Page 2
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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
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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
Building design and building form
O23 Development ensures that building design S23.1 Buildings and materials and surface Not applicable
and built form accounts for the potential flood treatments used below the defined flood
risks and are resilient to flood events by— event are resilient to water damage and do
a) ensuring building materials used have high not include wall cavities that may be
water resistance and will improve the resilience susceptible to the intrusion of water and
of a building during and after a flood event; and sediment;
b) maintaining a functional and attractive street S23.2 Buildings are designed to integrate
front address appropriate to the intended use. well with the street level and the levels of
adjoining properties to facilitate pedestrian
flows and visual and physical connectivity
between the footpath and ground floors;
S23.3 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;
S23.4 Residential buildings minimise risk
from flooding by providing parking and other
low intensive, non-habitable uses at ground
level;
S23.4 Non-residential buildings and
structures are oriented to the street by
activating the street frontage with appropriate
uses and urban design treatments such as
recessed wall treatments, screening or
landscaping, whilst allowing for flow through
of flood waters on the ground floor.
Disaster Management
O24 Development supports, and does not S24.1 Development does not— The carpark is unlikely to be used in terms
unduly burden, disaster management response a) increase the number of people calculated of flood due to restricted access. A Flood
or recovery capacity or capabilities. to be at risk from flooding; Management Plan is able to be prepared
b) increase the number of people likely to to address actions to minimise any risks
need evacuation; for the development.
c) shorten flood warning times; or
d) impact on the ability of traffic to use
evacuation routes, or unreasonably increase
traffic volumes on evacuation routes.
Noosa Council Page 4