2014-03-25 Planning & Organisation Committee Agenda Pages 81-167

PLANNING & ORGANISATION COMMITTEE MEETING AGENDA                               25 MARCH 2014


Flooding & Drainage
   Alteration of natural drainage channels          The development of Precinct 2 requires a
    through the site will worsen flooding impacts    significant amount of fill to achieve flood
    on upstream and downstream properties.           immunity, as well as engineering solutions
   Loss of flood storage.                           to ensure the flood storage and
                                                     conveyance. The extensive engineering
   New development should not be allowed in         works within this sensitive environment
    flood risk areas.                                represents a significant risk and possible
   The proposal necessitates extensive cut and      irreversible impacts.
    fill resulting in a dramatic change to the
    existing landform and drainage patterns at the
    expense of habitat and environment.
   The water level of the lake is influenced by
    tides.     It is possible that flooding never
    previously experienced will result with the
    added run-off.
   During the 1893 flood, the water level of Lake
    Weyba rose by 2.5m.
   Biological/microbal treatment of stormwater is
    preferred to traditional methods.
Lake Weyba & Water Quality
 The current vegetation and waterways act as a      The development poses unacceptable
  natural management of the rainwater runoff.        risks to the water quality of Lake Weyba
  Turning this land into virtually an open drain     and Keyser Creek, in particular from
  will dump tonnes of sediment into Lake             construction sediment runoff from the bulk
  Weyba.                                             earthworks and civil and domestic
 Lake Weyba is part of the “lungs” of the Noosa     construction required by the development.
  River system and has been recognised by the
  Commonwealth Government as a wetland of
  national importance. The development may
  irrevocably compromise the high water quality
  of the sensitive Lake Weyba catchment, both
  during and post construction.
 Healthy Waterways “A” rating of the Noosa
  River is important to the branding of Noosa
  and should be protected.
 Reduction in water quality will result in
  reduction in fish stocks or even some total
  species loss within the Noosa River system
  and impact on commercial and recreational
  fishing.
 The volume of Lake Weyba is deceptively
  small due to its shallow depth, making it
  vulnerable to sediment and chemical runoff,
  and algal bloom infestation. The lake will not
  be able to flush contaminants away due to its
  benign nature. Runoff and pollution will not be
  able to be controlled.
 With extensive cut proposed, there is potential
  for acid sulphate soil runoff and impacts on
  water quality.


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