18164 - SBSMP - Rev 0

                                                                                          18164 - SBSMP/0
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4.2 Existing Drainage Patterns
Data obtained from the detailed site survey and Dial Before You Dig (DBYD) plans indicate the
proposed development area has the following drainage patterns:

Surface Runoff
Surface runoff from the proposed development area sheet flows west to the nature reserve.

External Catchment
The upstream site on 223 David Low Way is serviced by the existing 300mm to 450mm diameter
stormwater main located within the easement traversing the site. Therefore no further
consideration of the upstream catchment is required.

Refer to Appendix A for the detailed site survey and Appendix C for the DBYD plans.


4.3 Lawful Point of Discharge
If the proposed development maintains pre development flow conditions, the lawful point of
discharge (LPD) is the nature reserve, west of the site.

In consideration of the site characteristics, surrounding topology and stormwater drainage
infrastructure, the aforementioned proposed lawful point of discharge is considered to be
compliant with the criteria for lawful point of discharge outlined in Section 3.9.1. of QUDM 2017
as per below:

    i) The location of the proposed discharge point is under the lawful control of the local
       government or other statutory authority from whom permission to discharge has been
       received.

    ii) The post development discharge will not cause an actionable nuisance, nor environmental
        or property damage, as it is intended to implement mitigation measures to account for
        any change to the existing flow characteristics.

    iii) Authority to discharge over affected properties will not be required as the proposed
         drainage patterns will maintain existing drainage patterns, which will not impact
         surrounding properties.

Refer to Section 5 outlining the Stormwater Quantity aspects of this site.




Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach