Stage reports 1-4 along with supporting concept design renders were made available for public review as part of phase 2 consultation.
The available reports include:
- Stage 1 Literature Review - to take stock of what is known and identify any information gaps.
- Stage 2 Coastal Protection Assessment - to determine sand movement, beach behaviour and impacts/opportunities around public access and amenity.
- Stage 3 Concept Design Options - for a terminal protection structure (seawall) and sand nourishment, and potential seawall alignment.
- Stage 4 Sand Nourishment Investigation - to help maintain public beach amenity.
The concept render designs were developed to assist in visualising the concept seawall design options. Seawall alignment, access points and terminal ends will be determined during a detailed design phase.
The Stage 5 (Coastal Monitoring Studies, to monitor beach conditions) and Stage 6 (Cost Benefit Analysis to guide development of possible funding models) are currently under review and will be available here soon for you to view.
Council will continue to engage with the Wamberal and broader Central Coast community throughout the project to ensure that community opinion, sentiment and understanding are reflected in the decision-making process for a long-term solution to this complex problem.
How can I get involved?
You are invited to:
- View the phase one consultation information here
- Read the available technical studies available in the document library on this page
- View the frequently asked questions available below
Between 29 July and 10 September the community were invited to:
- Provide feedback on the interactive concept design renders (now closed)
- Complete the phase two survey (now closed)
- Register to attend a drop-in information session (now closed)
- Learn more on the history of Wamberal and register to stay updated here
Feedback for phase 2 consultation was accepted until 10 September 2021.
What was involved in Stage 1 Literature Review?
Stage 1 was to take stock of what is known and identify any information gaps. The objective for this study was to review previous studies related to coastal hazards and coastal management and previous design of terminal protection for Wamberal Beach.
The report contains a compiled review and summary of over 30 studies relevant to the context of the Wamberal Terminal Coastal Protection Assessment.
What was involved in Stage 2 Coastal Protection Assessment?
Stage 2 determined sand movement, beach behaviour and impacts/opportunities around public access and amenity. Objectives for this study included:
- existing profile data assembly
- geotechnical data review
- preliminary crest alignment
- beach width analysis
- impact assessment to beach users and beach amenity.
What was involved in the Stage 3 Concept Design Options?
Stage 3 entails concept design options for a terminal protection structure (seawall), sand nourishment requirements and potential seawall alignment. Objectives for this study included:
- crest alignment
- seawall options – rock, vertical, stepped and hybrid
- cost estimates
- minimum engineering standards.
A total of five seawall concept designs have been developed with cross-section drawings and footprint mapping. The designs range from revetment to vertical and promenade style structures. This study also includes a review of the relevant engineering standards.
What was involved in the Stage 4 Sand Nourishment Investigation?
Stage 4 outlines sand nourishment requirements for Wamberal Beach and investigation of potential sand sources including indicative unit cost estimates. Objectives for the study include:
- sand requirements
- sand sources
- sand nourishment cost estimates.
The key objective of Stage 4 is to provide an acceptable level of public beach amenity for the Wamberal/Terrigal embayment over the life of a terminal protection structure.
What is involved in the Stage 5 Coastal Monitoring Studies?
Stage 5 consists of additional coastal monitoring studies to observe past and present-day beach conditions to better understand the natural fluctuation of the beach. Monitoring includes:
- installation of a Coastsnap monitoring site on Terrigal Drive
- installation of Trailcam, Lidar wave runup monitoring station
- live Coastal Monitoring Public Webpage to display monitoring data.
Stage 5 is ongoing, with all monitoring stations established and operating. A testing version of the public webpage has been developed and is currently undergoing testing and quality assurance.
What is involved in the Stage 6 Cost Benefit Analysis?
Stage 6 will include a Cost Benefit Analysis (CBA) to assess the full range of costs and benefits associated with the project and a Distributional Analysis (DA) to demonstrate how costs and benefits are distributed. Principles of the study aim to:
- assess the costs and benefits of options for managing the identified threat posed by coastal erosion to Wamberal
- understand the social and economic impacts of each option in terms of housing, local tourism, environmental benefits, beach amenity, supporting industries and the long-term viability of Wamberal.
The CBA and DA will guide the development of possible funding models.
What can I expect from the Concept Render Designs?
The concept designs were developed to help visualise each of the seawall options and show the extent of the proposed footprints. True alignment of the wall, terminal ends and beach access pathways would be determined during a detailed design phase, which will encompass further community consultation.
Have environmental studies been undertaken in accordance with the current study?
No. The environmental studies would be undertaken as part of a detailed design phase.
Environmental studies/approvals are a legislative requirement for the construction of a terminal protection structure and sand nourishment operations
What is Councils plan for the “68 dwellings identified as potentially impacted by coastal hazards by 2050”? will development applications be assessed?
Any Development Application (DA) submitted will be considered on its merits under the relevant planning controls and certified CZMP.
What information is being used to inform the updated Cost Benefit Analysis (CBA)? How will this information differ to the previous CBAs developed?
The new CBA will include updated economic data such as current land value and rate information. Council has provided Balmoral economists with beach use data from the Surf Live Saving Club to assist in determining beach value.
The costs of associated emergency/ongoing maintenance works will put a cost on the “do normal” (or do nothing) approach; which was not considered in the previous CBA.
The Stage 1 report is a review of all of the previous studies, how will this review and the learnings from the previous studies be used to inform decision-making around a preferred solution for Wamberal Beach this time?
Stage 1 outlines information relevant to the context of the Wamberal Terminal Coastal Protection Assessment, demonstrating a long history of coastal erosion. Our understanding of coastal processes and engineering have advanced since the development of those studies, which have influenced new design options being presented in the current studies.
Information gaps in the previous CBA were identified and have been used to inform the new CBA undertaken, particularly by including a distributional analysis.
Previous studies demonstrated funding as a downfall to progression of any long-term solution for Wamberal Beach. Lessons learnt have shown the need for a funding model to be developed which will be a key deliverable to progress into a detailed design phase.
What are the beach amenity impacts of the proposed seawall options for Wamberal Beach?
Table 5.4 Summary of amenity impacts of proposed options for Wamberal Beach (extracted from Stage 2 – Coastal Protection Amenity Assessment) lists impacts for each option.
Does the existing Environment and Planning legislation allow for sand nourishment from alternate sources?
It is possible to use sand from alternate sources but a particular type of sand is required. Where sand is sourced alternatively (i.e. not from the same beach embayment) it must be first deemed a viable source by demonstrating similar characteristics such as grain size/colour and be free of contaminants. The Guidelines for Sand Nourishment Science and Synthesis for NSW is the guiding document for sand nourishment in NSW.
Any operations involving sand nourishment would require environmental assessment and possible environmental protection licences dependent on how sand is applied (i.e. offshore vs on land). The Environment Protection Authority (EPA) issues environment protection licences under the Protection of the Environment Operations Act 1997 (POEO Act).
Sand nourishment operations at Wamberal Beach must be consistent with the Coastal Management Act 2016 and State Environmental Planning Policy (Coastal Management) 2018.