2008/0169 Response to information request - 71 Seaview Tce Sunshine Beach · 132008.169

discharge directly into the existing gully located to the north of the site. Flows from McAnally Drive and
allotments located to the west of the road will have no effect on the stormwater characteristics of the site.




        OUTLET FROM
       MCANALLY DRIVE




                                                                    r FLOW DIRECTION




                                                                                             SITE fC i.JNDARY




                                            Figure 2 - Existing Site Drainage


3.0 WATER QUANTITY-ADJOINING DEVELOPED SITE

3.1   INTRODUCTION

The Rational Method has been used to calculate the peak stormwater runoff flow rates for the pre and post
development sites (subdivision and MUD site) for all ARI (Annual Recurrence Interval) from the 1 year to 100 year
event. Appendix B provides detailed Rational Method calculations.

3.2   CATCHMENTS

The catchment (3,680m2) discharging to the western boundary of the subject site contains the two allotments
adjoining the site to the west (30 & 34 McAnally Drive, Sunshine Beach). The entire area within the two
allotments will discharge onto the subject site. The external catchment plan is shown below in Figure 3.




 SITE BASED STORMWATER MANAGEMENT PLAN - Revision D     71 Seaview Terrace. Sunshine Beach                          3