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MCU Report Appendix D Overlay Codes · MCU13/0211
Appendix D Overlay - Flood Hazard
Table 1 Flood Hazard areas
Column 1 Column 2 Column 3
Specific Outcomes Probable Solutions Compliance
13.1 Effects of use and works
Safety and floodplain function
O14 The proposed use does not compromise the safety of S14.1 The use does not result in an increase in the number of Complies - Floor area will be located above flood area.
people or property from floods up to and including a 1% AEP persons living, working or congregating in Flood Hazard Areas
(1:100 year ARI) flood event. identified on Overlay Maps OM1.3—OM9.3; or
S14.2 At least one access route above the 1% AEP (1:100
year ARI) flood level is available for evacuation; or
S14.3 An area of sufficient size and dimensions to
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.
O15 Development does not result in adverse impacts on S15.1 No solution provided Conditions may be imposed if considered appropriate
people’s safety and capacity to use land within floodplains.
Hazardous materials
O16 Public safety and the environment are not adversely S16.1 Hazardous materials are manufactured and stored Hazardous materials not intended to be stored on the site.
affected by the detrimental impacts of floodwater on hazardous above the level of a 1% AEP (1:100 year ARI flood event;
materials manufactured or stored in bulk. OR
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
O17 S17.1 . Sewerage treatment plants not proposed for site.00
O18 S18.1 Not applicable
O19 All lots have sufficient area that is above the 1% AEP S19.1 The minimum area above flood level for each lot, is in Council’s minimum floor heights to apply.
(1:100 year ARI) flood level or where modelling is not accordance with standardsError! Reference source not found.;
available, the highest recorded flood level, to safely and AND
adequately accommodate their intended use. S19.2 Where the existing roads servicing a development
provide a specific flood immunity (as determined by Chapter 6
of the Qld Transport Road and Drainage Design Manual and
1
PSP 1 outlines information Council may request for development within an area identified as Flood Hazard Area.
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Overlay - Flood Hazard
Column 1 Column 2 Column 3
Specific Outcomes Probable Solutions Compliance
AND the Australian Rainfall and Runoff Guide), all lots have access
to the flood free area that matches the road immunity;
AND
O20 Development integrates with the natural landform rather S20.1 Flood immunity for development areas is not achieved Some filling of the site is required to achieve minimum
than modifying the landform to suit the development.1 by filling land below the 1% AEP (1:100 year ARI) flood level; floor heights as well as ensuring open space and
or recreational areas are integrated with the habitable areas.
S20.2 Where modelling is not available, flood immunity for
development areas is not achieved by filling land below the
highest recorded flood level.
O21 Filling or excavation only occurs where it does not No solution provided. Conditions - may be imposed in this regard
adversely impact on—
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.
Table1.2 Acid sulfate soil areas
column 1 column 2 Column 3
Specific Outcomes Probable solutions compliance
13.2 Effects of works
General Partial solution
O22 Works do not disturb acid sulfate soils or are S22.1 The disturbance of acid sulfate soils is avoided by— Complies -condition may be imposed in this regard.
managed to avoid the release of acid or associated metal a) not excavating or otherwise removing soil or sediment
2
contaminants. identified as containing acid sulfate soils;
b) not permanently or temporarily extracting groundwater
that results in the aeration of previously saturated acid
sulfate soils; and
c) not undertaking filling that results in actual acid sulfate
soils being moved below the watertable or previously
saturated acid sulfate soils being aerated;
OR
S22.2 The disturbance of acid sulfate soils avoids the release
of acid or associated metal contaminants by—
a) neutralising existing acidity and preventing the
generation of acid and associated metal
contaminants; and
b) preventing the release of surface or groundwater
flows containing acid or associated metal
contaminants into the environment.
2
PSP1 Details information Council may request to assist in the assessment of whether or not the application achieves the relevant specific outcomes.
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