MCU14/0106 & OPW15/0001 Compiled Information Request Response

                                                                                  MCU14/0106




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.

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.

Issue – Water Quantity
The concept of the use of the car parks and bioretention basins is considered acceptable
means for providing flood attenuation but the quantum of detention may need to be larger
than that allowed for.

Information Required
55     Amended WBNM model and proposal plans, and potentially a hydraulic plan, to
       demonstrate the runoff from the development can achieve the required attenuation




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