2018-04-10 Planning & Environment Committee Agenda

PLANNING & ENVIRONMENT COMMITTEE MEETING AGENDA                                    10 APRIL 2018


  The minimum road level for Lake Weyba Drive access is approximately 1.6 m AHD. Based
  on Council’s DFE flood modelling, it is predicted to take flood waters less than 2.5 hours to
  rise from 1.3 m AHD up to 1.6 m AHD.”
  Based on the above, HWMC believe that there is potential for residents to unwittingly
  become isolated during floods. This presents isolation risks to residents plus the potential
  for an increase demand on emergency services. This risk may be somewhat mitigated by
  conditioning the proposed lots to provide an emergency refuge shelter above the Probably
  Maximum Flood.”
The Natural Hazards Overlay Code requires development to “…have an effective evacuation
route that remains passable, with sufficient warning time, to enable people to progressively
evacuate to safe areas above the probable maximum flood”. The development remains contrary
to the code as it does not provide an evacuation route that is passable in a flood event. The site
is only accessible via Lake Weyba Drive which is subject to inundation and is not driveable
during a flood event. Council’s external hydrologist has indicated that in a peak event, Lake
Weyba Drive can be inundated to a depth of .7m.
The proposal to introduce fill and modify the landform in order to subdivide land is also contrary
to The Noosa Plan’s Natural Hazards Overlay Code where “…flood immunity for development
areas is not achieved by filling land below the 1% AEP (1:100 year ARI) flood level”.
Furthermore, the Reconfiguring a Lot Code requires development to “…respond to the distinctive
landscape character of the site by using the natural features of the site”. The code specifically
requires that development integrate with the natural landform rather than modify the land to suit
the development. Therefore the proposal to achieve flood immunity by filling is contrary to both
these codes.
Although a large area is created above the defined flood level, concern is raised regarding a
flood event which may exceed a 1% AEP, compromising the safety of people and property. The
development may burden disaster management response and recovery capacity by increasing
the number of people at risk to the natural hazard.
The proposed development does not demonstrate compliance with the Specific and Overall
Outcomes of the Natural Hazards Overlay Code as it increases the number of people at risk from
flooding by filling land in a flood hazard area. The proposed development is not resilient to the
natural hazard and unduly burdens disaster management response and capacity.
Bushfire Hazard
The subject site is located within a Bushfire Hazard Area with the south-western portion included
in a ‘High Potential Bushfire Intensity’ and a majority of the lot to the east mapped as ‘Potential
Impact Buffer’. An Impact Buffer typically includes all land within a 100m radius of any hazardous
vegetation. Figure 4 below shows the extent of the hazard mapping over the site.




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