Attachment A to Judgment for 19Aug 2024 (6)

 Linke and Linke Surveys                                                 SLR Ref No: 620.31071-R01-v3.0-FEMP.docx
 Flood Emergency Management Plan                                                                    February 2024
 111 Lake Weyba Drive, Noosaville




3.3        Evacuation Route
Figure 6 presents a long section profile of the proposed access/evacuation route to a non-isolated flood free
area. Route topography was extracted from ALS data. The evacuation route from the site is to Eenie Creek Road
via Lake Weyba Drive, Weyba Road and Reef Street. This route has a minimum elevation of approximately
1.5 m AHD along Weyba Road. It is noted that pedestrian and cycle traffic can escape to the same location via
a much shorter route.

The evacuation route is impacted by floodwaters originating from the Noosa River catchment in events greater
than the 2% AEP flood event. Although velocities over the road are expected to be low, residents should not
attempt to drive through stretches of inundated road.

Based on the 1992 flood event, which was assessed as part of Council’s Noosa River flood model, once Lake
Weyba Drive is closed, it is closed for more than 24 hours. Further, the rate of rise was such that in order to
allow for 2 hours of evacuation time prior to any water over Lake Weyba Drive, the trigger level for evacuation
should be 1.3 m AHD. A trigger level of 1.1 m AHD would allow for sufficient time to prepare for evacuation
such that when the level of 1.3 m AHD is reached, evacuation can occur immediately.




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