Planning Response letter to Council Information Request · MCU18/0015

   of approval requiring more detailed technical assessments to be undertaken to prove up this
   construction methodology.


   Item 9 – Provide an alternative to the rapid infiltration pits.


   Response – Rapid infiltration pits have been removed from the engineering design. The
   Engineering Report included at Attachment 4 provides a detailed assessment of stormwater
   quantity measures and it has been determined that due to the site being located at the lower end
   of a large external catchment, on site stormwater detention is not required as the proposed
   development will not cause an actionable nuisance for downstream properties. Please refer to
   Section 7.2 of the Engineering Report for the full assessment.


   Item 10 – Provide full details as to how excavations on the site for the currently proposed
   development layout are to be constructed and the retention systems to be employed to avoid
   causing instability both during and post construction.


   Response – Section 6.1 and 6.2 of the Geotechnical Report included at Attachment 5 outline the
   proposed measures for ensuring slope stability is maintained during construction.


   Item 11 – Provide an assessment of the potential for long-term erosion to occur in the creek and
   the effect this will have on the stability of the adjacent land.
   Item 12 – Recommendations should be provided, if required, on measures to reduce the potential
   for erosion.


   Response – Rainwater tanks are proposed to be provided on the 2 dwelling house lots and a SPEL
   tank is proposed on the unit allotment which will capture frequent minor storm events. All
   stormwater outlets to the existing flow path are proposed to be provided with appropriate scour
   protection measures and flow dissipation devices. The geotechnical report additionally
   recommends a variety of measures to ensure slope stability around the creek including
   revegetation and creek bank stabilisation measures such as the use of matting, geo cell products
   and the like to ensure slope stability is maintained in the long term. The applicant would expect
   that conditioning of the recommendations in the geotechnical report would form part of any
   development approval and that specific measures to control erosion would be addressed as part
   of the detailed design of the development.




                                                                              P: 07 5452 5207
                                                                              E: [email protected]
                                                                              45 First Ave, Mooloolaba Qld 4557
                                                                              PO Box 1043 Maroochydore Q 4558
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