Response to Information Request 20220004 -Tunba Court

            4th March 2022

            Ref:    OPW21/0355

            Noosa Council
            PO Box 141
            TEWANTIN QLD 4565


            Attention:                        Mark Lewis

            Dear Sir,

                        Re:                   Information Request
                        At:                   36 Tunba Court, Cooroy Mountain, QLD 4563


            With reference to the abovementioned information request for the development
            application (ref: OPW21/0355), we have been engaged to prepare additional information
            and design plans to respond to your queries as follows:


                    2. Provide additional detail to demonstrate how the existing and proposed
                    works achieve compliance with:

                        2.1. The Earthworks Code – Performance Outcomes PO2, PO9 and PO11

                    PO2
                    Change to the levels on site do not have an adverse impact on the flooding and
                    drainage characteristics off-site.

            The earthworks proposed as part of this operational works approval will not increase the
            impervious surface area of the site, and run-off increases from any future development are
            able to be catered for through the provision of rainwater reuse and attenuation tanks
            sized based on the development’s characteristics.

            Stormwater run-off from the earthworks pad are captured and conveyed by a concrete
            spoon drain to a point of discharge at the north of the development area, where the
            stormwater will be dispersed and energy dissipated through a rock energy dissipator
            sized in accordance with QUDM for the peak 1% storm flow event to minimise impacts of
            changes to the existing flow characteristics on the downstream environment. The point of
            discharge is in line with the existing overland surface flows, therefore the changes to
            earthworks levels are not considered to significantly alter the drainage characteristics or
            flooding off-site.




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