MCU14/0056 Stormwater Quantity Management Plan Att D Information response

2.1     Noosa Shire Council’s Information Request
      A response to each item from Noosa Shire Council’s Information Request dated 19 August
      2014 is presented below.

      RFI Item
      The assessment and report must include plan/s and data showing the extent of flooding
      (floodline) for 1% AEP storm event on the development site and the relevant downstream
      properties and roads (eg the Golf Course and Myall Street) for pre-development conditions.

      SWC Response
      Detailed results of the hydraulic modelling are provided in Appendix D of this report. Figure
      7 and 8 in Appendix A illustrate the 1% AEP flood extent for the existing and developed site
      and downstream of the site.


      RFI Item
      The general internal drainage layout and any proposed or anticipated required stormwater
      drainage works and mitigation works external or internal to the site.

      SWC Response
      This report does not address the internal drainage layout. Section 4.0 of this report identifies
      that a detention basin is not required on site. The nominal storage in the bio retention basins
      will attenuate the frequent low flows. Therefore it is considered that a detention basin is not
      required. The internal drainage design will be documented in the detailed design stage of the
      project.


      RFI Item
      Plan/s and data showing the extent of flooding for post development conditions on the fully
      developed site and the relevant downstream properties and roads for 1%, 5% and 10% AEP
      storm events.

      SWC Response
      Detailed results from the hydraulic modelling are provided in Appendix D of this report.
      Figures 7 and 8 in Appendix A illustrate the 1% AEP flood extent for the existing and
      developed site and downstream of the site.


      RFI Item
      Identification of potential adverse impact on other properties and recommended mitigation
      measures.

      SWC Response
      It has been demonstrated in Section 5.0 of this report that the development would not cause
      an adverse impact; therefore no mitigation measures are proposed.




                                       J4279 Report 1.0.doc
                                         14 January 2015                                       Page 6