Appendix D- Stormwater Management Plan · MCU23/0078

Performance Outcomes                                              Acceptable Outcomes
                                                                  Stormwater drainage infrastructure is co­located with other
                                                                  infrastructure within a combined utility corridor where appropriate.

                                                                  AO5.3
                                                                  Temporary vehicular crossings of waterways must be designed
                                                                  and constructed to be consistent with the current International
                                                                  Erosion Control Association Best Practice Book Series.



Stormwater quality and protection of receiving waters                       Table 9.4.8.3 Criteria for assessment (part)
Performance Outcomes                                              Acceptable Outcomes
Stormwater quality and protection of receiving waters
PO6                                                               AO6.1
Development is located, designed, constructed and operated to     Stormwater runoff discharging into High Ecological Value waters
protect and enhance environmental values and water quality of     as a result of development causes no increase in gross
waterways, wetlands, lakes, ground waters and drainage            pollutants, total suspended solids, total phosphorous or total
systems.                                                          nitrogen compared to a pre­development scenario.

                                                                  AND
Editor’s note: Environmental values of waters and water quality
objectives are prescribed in Schedule 1 of the Environmental      AO6.2
Protection (Water) Policy 2009 and are identified on the State    All stormwater runoff is treated to achieve maximum removal of
Planning Policy Interactive Mapping System.                       nutrients, gross pollutants and suspended solids as determined
                                                                  by cost to efficiency ratios. (e.g. bioretention basins must be sized
                                                                  to achieve at least 80% reduction in total suspended solids, 60%
                                                                  reduction in total phosphorous, 45% reduction in total nitrogen
                                                                  and 90% reduction in gross pollutants >5mm).

                                                                  OR

                                                                  AO6.3
                                                                  Developments achieve a minimum 3 drop rating consistent with
                                                                  the Water by Design Living Waterways Scoring Guide (Healthy
                                                                  Land and Water).

                                                                  Editor’s note— PSP6 Engineering Design Standards ­ Roads,
                                                                  Drainage and Earthworks provides guidance on stormwater
                                                                  design and modelling requirements.
PO7                                                               AO7.1
Water quality treatment systems use natural processes and         Water quality treatment systems are designed to be integrated
materials, whenever possible, and are integrated into             into the landscape consistent with the technical design guideline
development to enhance biodiversity and landscape benefits.       published by Healthy Land and Water Water by Design for the
                                                                  feature. (eg. For Bioretention Basins: Bioretention Technical
                                                                  Design Guidelines (October 2014) and for Wetland Systems the
                                                                  Wetland Technical Design Guideline (May 2017).
PO8                                                               AO8.1
Water quality treatment infrastructure to be dedicated as         Detailed life cycle costing is provided for the entire treatment train
public assets are proven to be suitable for its use and of a      system including replacement costs of asset parts.
cost effective and efficient standard.
                                                                  AO8.2 Treatment systems dedicated as public assets are
                                                                  designed to minimise maintenance, renewal and adaption costs
                                                                  and the requirement for specialised equipment, material or
                                                                  maintenance techniques.

                                                                  AO8.3
                                                                  Vegetated stormwater management systems to be dedicated as


                                             NOOSA PLAN 2020 ­ AMENDED AT 25 SEPTEMBER 2020                                  Page 116 of 150