2021-10-08 SM - Item 1 - Attachment 2 - Draft Coastal Hazards Adaptation Plan - tracked changes

Adaptation outcomes and associated actions for Marcus Beach and Castaways Beach

The assessment of erosion risks in Marcus Beach and Castaways Beach show the level of risk to
most assets is acceptable, however the risk to a section of David Low Way is expected tomay
become intolerable by the year 2070. Therefore, the most suitable adaptation pathway for this
locality is one that supports the provision of accessibility to residential communities currently
dependent on David Low Way.

As a result, the preferred adaptation outcomes for this locality are:

   -   Implement measures that support and enhance dunes, beach health and natural coastal
       processes as soon as possible
   -   Prevent the construction of hard protective structures where possible that are likely to
       exacerbate erosion risk, impact on preferred outcomes for dune and beach health, impair
       natural coastal processes, and lead to adverse impacts on neighbouring areas
   -   Seek to accommodate the risk to major infrastructure through (i.e. David Low Way)
       adaptive design in order to increase resilience during a major erosion event, and ensure
       continued functionality post-event.

Figure 13 shows the expected progression of these preferred outcomes between 2020 and 2100.
Table 7 provides a breakdown of actions in support of these outcomes, to be pursued within the
five year life of this plan.




 Figure 13 - Preferred long-term adaptation pathway response to projected coastal erosion risks in Marcus Beach and
                                                 Castaways Beach




Noosa Council – Coastal Hazards Adaptation Plan 2020 - 2030                                                Page 41