Att 2 SWMP

Stormwater drainage design Table 9.4.8.3 Criteria for assessment (part)
                         Performance Outcomes                                                                                  Acceptable Outcomes                                                                                                               Response
Stormwater drainage design
PO1                                                                             AO1
The development and its stormwater management system is planned and             A stormwater management plan is prepared consistent with PSP6 Engineering Design Standards - Roads, drainage and           Complies - Refer to the SWMP that has been designed to be consistent with the PSP6 Engineering Design Standards -
designed having regard to:                                                      earthworks.                                                                                                                Roads, drainage and earthworks and QUDM.

   1. the natural features of the site;
   2. the need to avoid impacts and potential risks to ecologically important
   areas;
   3. the likely effectiveness of erosion and sediment control and stormwater
   drainage measures during rainfall events during and post construction; and
   4. the need to protect environmental values and water quality of receiving
   waters both during and post construction.

PO2                                                                             AO2.1
                                                                                Stormwater drainage planning, design and construction is in accordance with PSP6 Engineering Design Standards -
Stormwater drainage infrastructure is planned, designed and constructed to:                                                                                                                                To be complied with at detailed design in conjunction with the SWMP
                                                                                Roads, drainage and earthworks and the latest version of the Queensland Urban Drainage Design Manual.


   1. incorporate allowance for increased flood risk and tidal inundation through
                                                                                  AO2.2
   pipework as a result of cilmate change and sea level rise;
                                                                                  The stormwater drainage system connects to a lawful point of discharge in accordance with PSP6 Engineering Design
   2. ensure the development is adequately drained; and                                                                                                                                                    Complies - Stormwater drainage connects into existing Council owned stormwater drainage line
                                                                                  Standards - Roads, drainage and earthworks.
   3. ensure stormwater is managed and lawfully discharged without altering
   stormwater drainage characteristics external to the site.
                                                                                  AO2.3
                                                                                  Stormwater flows discharging from the development are demonstrated to be consistent with pre-development                 Complies - Refer to SWMP. The increase in flows arising from the development have been mitigated to pre-development
                                                                                  characteristics.                                                                                                         levels.

                                                                                AO2.4
                                                                                Development provides for the management of stormwater to incorporate appropriate allowance for climate change
                                                                                                                                                                                                           Complies - A 20% increase to rainfall intensities has been considered to account for climate change impacts. Refer to
                                                                                impacts (including rainfall intensity and sea level rise), in accordance with PSP6 Engineering Design Standards – Roads,
                                                                                                                                                                                                           SWMP.
                                                                                Drainage and Earthworks.