H - Revised Integrated Water Management Plan by Cardno (inc MUSIC file) (13.09.19)

                                                                                  Integrated Water Management Plan
                                                                          Noosa Marketplace : 2-20 HOFMANN DRIVE



Drive is inundated to a maximum depth of 200 mm, increasing to 300 mm in the 1% AEP event at the
roundabout on Hofmann Drive near the site access. The current 1200 mm x 300 mm RCBC under the site
access restricts flows along the eastern boundary of the site. These flows then spill out onto Hofmann Drive,
flowing south along Hofmann Drive and finally entering Rene Street.
At Point 1 (Figure 7-1), located within the northern vegetation covenant area, flood depths of up to 1 metre
occur in the 1% AEP event (Figure 7-2). Within the environmental reserve at the legal point of discharge, a
depth of approximately 400 mm occurs in the 1% AEP event.
Similarly, at P3 ( Figure 7-1) Eenie Creek Road is inundated to a depth of 300 mm in the 2% and 1% AEP
events. This section of the road conveys runoff from an external catchment to the north which then flows down
the road embankment into the northern portion of the development site.
Table 7-2 and Figure 7-1 show the existing condition flood levels on the site, while the figures in Appendix C
show the corresponding flood extents.




Figure 7-2    Existing Ponding




V190428 | 10 September 2019 | Commercial in Confidence                                                         25