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MCU14/0045 & OPW14/0268: Appendix D - Hazard Code
Appendix D: Natural Hazards Overlays Code - Flood Hazard Areas
PERFORMANCE CRITERIA ACCEPTABLE SOLUTIONS COMMENTS
13.38 Effects of use and subdivision
Safety and floodplain function S14.1 The use does not result in an increase in the 100% of the site will be maintained above the 1% AEP
O14 The proposed use does not compromise the number of persons living, working or congregating in flood level. The impact, if any, of the proposed
safety of people or property from floods up to and Flood Hazard Areas identified on Overlay Maps development on regional flood depth, duration or
including a 1% AEP (1:100 year ARI) flood event. OM1.3—OM9.3; or velocity, is negligible.
S14.2 At least one access route above the 1% AEP
(1:100 year ARI) flood level is available for
O15 Development does not result in adverse impacts evacuation; or
on people’s safety and capacity to use land within S14.3 An area of sufficient size and dimensions to
floodplains. accommodate users is provided, above the 1% AEP
(1:100 year ARI) flood level that allows for safe
congregation and evacuation;
AND
S14.4 Works avoid any reductions in on-site flood
storage capacity and contain within the site any
adverse changes, including changes to the depth,
duration or velocity of flood waters up to and
including a 1% AEP (1:100 year ARI) flood event.
S15.1 No solution provided
Hazardous materials S16.1 Hazardous materials are manufactured and Hazardous materials will not be manufactured or stored
O16 Public safety and the environment are not stored above the level of a 1% AEP (1:100 year ARI below RL 2m AHD.
adversely affected by the detrimental impacts of flood event;
floodwater on hazardous materials manufactured or OR
stored in bulk. S16.2 Buildings or structures used for the
manufacture or storage of hazardous materials are
designed to prevent the intrusion of floodwaters up
to the level of a 1% AEP (1:100 year ARI) flood
event.
Infrastructure S17.1 Components of the sewerage treatment Not applicable.
O17 Sewerage treatment plants maintain their plants that are likely to fail or may result in
function during flood events up to a 1% AEP 1:100 contamination are—
year ARI) flood event. a) located above the level of a 1% AEP (1:100 ARI)
flood event; or
b) are designed and constructed to exclude water
inundation or infiltration and resist hydrostatic and
hydrodynamic forces as a result of inundation.
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Appendix D: Natural Hazards Overlays Code - Flood Hazard Areas
PERFORMANCE CRITERIA ACCEPTABLE SOLUTIONS COMMENTS
S18.1 Community Uses and Infrastructure Uses Not applicable.
O18 Community Uses and Infrastructure Uses are are sited and constructed to ensure that floor levels
able to function effectively during and immediately are not less than the AEP (or ARI) levels identified
after flood events. below—
a) Emergency service facilities- 0.2% AEP (1:500
ARI);
b) Emergency shelter- 0.5% AEP (1:200 ARI);
c) Police station- 0.5% AEP (1:200 ARI);
d) Hospital- 0.2% AEP (1:500 ARI);
e) Electricity substation- 0.2% AEP (1:500 ARI);
f) Water treatment plant- 0.2% AEP (1:500 ARI);
g) Power station- 0.5% AEP (1:200 ARI);
h) Major electrical switch yard- 0.5% AEP (1:200
ARI); and
i) Store for valuable records or items of historic or
cultural significance- 0.5% AEP (1:200 ARI).
O19 All lots have sufficient area that is above the 1% S19.1 The minimum area above flood level for each A Council Flood Information Certificate has been
AEP (1:100 year ARI) flood level or where modelling lot, is in accordance with Table 13.11; obtained which indicates that the defined flood level is
is not available, the highest recorded flood level, to AND RL 2m AHD, based on the 1% AEP event. A minimum
safely and adequately accommodate their intended S19.2 Where the existing roads servicing a habitable floor level of RL 2.5m AHD has been adopted
use. development provide a specific flood immunity (as based on the Flood Information Certificate. 100% of
determined by Chapter 6 of the Qld Transport Road the site will be maintained above the 1% AEP flood
and Drainage Design Manual and the Australian level.
O20 Development integrates with the natural Rainfall and Runoff Guide), all lots The proposed development will not adversely impact
landform rather than modifying the landform to suit have access to the flood free area identified in Table the natural landform.
the development.45 13.11 that matches the road immunity;
AND
S20.1 Flood immunity for development areas is not
achieved by filling land below the 1% AEP (1:100
year ARI) flood level; or
S20.2 Where modelling is not available, flood
immunity for development areas is not achieved by
filling land below the highest recorded flood level.
No solution provided The proposed development will not adversely impact on
O21 Filling or excavation only occurs where it does existing watercourses or water levels on adjacent
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Appendix D: Natural Hazards Overlays Code - Flood Hazard Areas
PERFORMANCE CRITERIA ACCEPTABLE SOLUTIONS COMMENTS
not adversely impact on— properties.
a) watercourses, drainage lines and wetlands; and
b) vegetation on land identified on Biodiversity
Overlay Maps OM1.1-OM9.1; and
c) water levels on properties elsewhere.
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