2022-04-19 General Committee Meeting Agenda

GENERAL COMMITTEE MEETING AGENDA                                                      19 APRIL 2022




                         Figure 8 – Flood Depth Map – Probable Maximum (Flood)

An external review of the flood report was undertaken on behalf of Council by Switchback
Consulting which advised:
The site is subject to flooding from 3 drainage lines/waterways which flow through the site. Of
particular concern is the location of proposed lots 3-7 which become surrounded by flood waters
on all sides. The consequence of an extreme event on these lots is of particular relevance.
To analyse the flood risks, a flood model has been developed by the applicant and the existing/pre-
development model flood levels compared to the Council’s Noosa River Flood Study (2016). This
comparison has been independently checked and it is confirmed that the applicants model returns
similar, though higher peak flood levels for the 1%AEP and PMF. In terms of setting development
levels for building envelopes and dwellings, the applicant’s model is more conservative and
therefore appropriate.
Most of the proposed building envelopes are above the existing 1%AEP flood level. In terms of
flood impacts, the features of the proposal that have the potential to raise off-site flood levels are:
•     The proposed internal roadway which cuts across one of the drainage lines; and

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