Attachment 5 - Servicability Report · MCU23/0078

3.1.2   Proposed Infrastructure

        The following points outline the proposed stormwater infrastructure for the development site:

            −    Minor events from within Lot 3 will be conveyed by an internal stormwater piped network to the existing 1200mm
                 x 600mm box culvert at the south-west corner of the development site;

            −    Minor events from within Lot 7 will be conveyed by an internal stormwater piped network to the existing gully pits
                 along the private access roadway along the western frontage of the development site;

            −    Major events will be conveyed via overland flow towards and onto the surrounding private access roadways and
                 environmental zones as per existing conditions;

            −    As there will be an increase to the impervious area as a result of the proposed development, there will be an increase
                 to peak stormwater discharge rates from the development site. Based on this, stormwater detention measures are
                 required, and four below-ground stormwater detention tanks are proposed across both Lot 3 and Lot 7; and

            −    Considering the development works area is greater than 2500m2, stormwater quality treatment measures are
                 required for the proposed development as per the State Planning Policy and Noosa Shire Council Planning Scheme.
                 Treatment is proposed within multiple bio-retention basins across both development sites.


        Refer to Bornhorst and Ward’s Stormwater Management Plan for further details. Refer to the engineering drawings in
        Appendix B for further information.


3.2     EARTHWORKS

        Earthworks will be required to construct building pads, grade surface carparks and for basement excavation. A detailed
        earthworks plan will be prepared as a part of the detailed design operational works lodgement. A Preliminary Earthworks
        Plan has been provided in Appendix B.




                         Figure 3: Noosa Shire Council Potential and Actual Acid Sulphate Soils Overlay Map




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