MCU14/0106 & OPW15/0001 Appendix E - Stormwater Management Plan

Noosa Civic
Stormwater Management Plan



           Issue – Treatment Devices
           The total size of water quality treatment devices shown on plans is not clear. The design must allow
           sufficient space within the development footprint for the active filter media area in bioretention
           basins. The active filter media area does not incorporate batters, inlet scour protection and overflow
           devices.
           Information Required
           52        Provide legible scaled plans that demonstrate adequate footprint is provided to facilitate the
                     required active filter media area within bioretention basins along with sufficient footprint for
                     other aspects of the water quality improvement devices, such as batters, inlet scour
                     protection, etc.
A copy of the concept plans are included in Appendix E.
           Issue – Legal Point of Discharge
           It is unclear how waters treated within proposed bioretention basins will drain to a legal point of
           discharge or where this discharge point will be. There is concern that the underdrainage pipes will
           be lower than the invert of the receiving drainage lines.
           Information Required
           53        Provide a preliminary drainage plan for flows into and out of water quality treatment devices.
                     Demonstrate outlets can all be contained within the site.
A copy of the concept plans are included in Appendix E.
           Issue – Environmental Protection Act
           The scale of the development in terms of roof and hardstand area exceeds that anticipated by
           current Noosa Plan. In addition to ensuring developments achieve the Water Quality Reduction
           targets under the State Development Assessment provisions, Council must ensure that any changes
           inconsistent with the Noosa Plan are consistent with the objectives of the Environmental Protection
           Act.
           The Environmental Protection Act and subordinate legislation calls for Planning Schemes (or other
           stormwater management documents) to ensure that water quality objectives in the receiving
           environment can achieve ongoing compliance with the document titled “Environmental Protection
           (Water) Policy 2009 Noosa River environmental values and water quality objectives Basin No. 140
           (part), including Kin Kin Creek, Teewah coastal creeks, Lakes Cooroibah, Cootharaba, Doonella and
           Weyba July 2010.”
           The development is proposed within a catchment that is already heavily developed and the
           ecological processes within the receiving waters are expected to have minimal buffering capacity to
           withstand additional physiochemical changes.
           eSource Catchment software is able to model the status of a catchment and predict the quality of
           receiving waters.
           Information Required
           54        Please provide an eSource catchment model for the entire catchment that drains to the
                     receiving waters of Eenie Creek. The eSource Catchment Model must presume a fully
                     developed catchment consistent with the Noosa Plan together with the subject application.
                     The eSource catchment model must demonstrate that the development, including proposed
                     water quality mitigation devices, will not diminish the ability of Eenie Creek to achieve the
                     relevant water quality objectives required by the Environmental Protection (Water) Policy
                     2009 Noosa River environmental values and water quality objectives Basin No. 140 (part),
                     including Kin Kin Creek, Teewah coastal creeks, Lakes Cooroibah, Cootharaba, Doonella
                     and Weyba July 2010.




QIC Noosa Civic Pty Ltd                              Version Final                                        11 May 2015
J13041R2_Final SWMP.docx                         Commercial in Confidence                                     Page 12