Doddi's Beach Coastal Protection Project

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Delivering a safer, more sustainable future for one of Mandurah's favourite beaches.

Background

Doddi's Beach has been identified through the Northern Beaches Coastal Hazard Risk Management and Adaptation Plan (CHRMAP) as experiencing significant and immediate coastal erosion risk. The erosion threatens valued coastal assets, public infrastructure and the long-term resilience of this popular section of coastline. The location has also been identified by the State Government as one of Western Australia's 55 coastal erosion hotspots.

To address these risks, the City has completed a Coastal Adaptation Options Assessment and identified a preferred protection solution consisting of:

  • Construction of a Geosynthetic Sand Container (GSC) bag revetment adjacent to the western car park.
  • Extension of the existing Janis Street groyne by approximately 20 metres.
  • Construction of a low-profile GSC groyne between Roberts Point and Janis Street (to be constructed in a future year).
  • Reprofiling of the beach sand between Roberts Point and Janis Street once sand has built up on the beach

The project is currently forecast to be completed in stages, with the GSC revetment and Janis Street groyne works to be completed in the first stage and the beach reprofiling to be completed in the second stage.

The project aims to manage coastal erosion while protecting the foreshore reserve and associated community infrastructure.

Design has been informed by community feedback received through various coastal engagements including the Northern Beaches CHRMAP and a community petition relating to the management of Doddi's Beach and Roberts Point.

These engagements have helped identify the community values associated with Doddi's Beach and Roberts Point, including maintaining beach access, recreational opportunities, the natural character of the coastline and key foreshore assets.

These values have been considered alongside coastal hazard investigations and technical engineering assessments in the selection of the preferred protection solution.

The project has secured State Government funding at key stages through the Department of Transport and Major Infrastructure (DTMI) Coastal Adaptation and Protection (CAP) Grant program and the Hotspot Coastal Adaptation and Protection (H-CAP) Major Project Fund.

This funding has enabled the City to progress technical investigations, detailed design and delivery planning for the preferred protection solution, supporting implementation of actions identified through the Northern Beaches CHRMAP.

Delivering a safer, more sustainable future for one of Mandurah's favourite beaches.

Background

Doddi's Beach has been identified through the Northern Beaches Coastal Hazard Risk Management and Adaptation Plan (CHRMAP) as experiencing significant and immediate coastal erosion risk. The erosion threatens valued coastal assets, public infrastructure and the long-term resilience of this popular section of coastline. The location has also been identified by the State Government as one of Western Australia's 55 coastal erosion hotspots.

To address these risks, the City has completed a Coastal Adaptation Options Assessment and identified a preferred protection solution consisting of:

  • Construction of a Geosynthetic Sand Container (GSC) bag revetment adjacent to the western car park.
  • Extension of the existing Janis Street groyne by approximately 20 metres.
  • Construction of a low-profile GSC groyne between Roberts Point and Janis Street (to be constructed in a future year).
  • Reprofiling of the beach sand between Roberts Point and Janis Street once sand has built up on the beach

The project is currently forecast to be completed in stages, with the GSC revetment and Janis Street groyne works to be completed in the first stage and the beach reprofiling to be completed in the second stage.

The project aims to manage coastal erosion while protecting the foreshore reserve and associated community infrastructure.

Design has been informed by community feedback received through various coastal engagements including the Northern Beaches CHRMAP and a community petition relating to the management of Doddi's Beach and Roberts Point.

These engagements have helped identify the community values associated with Doddi's Beach and Roberts Point, including maintaining beach access, recreational opportunities, the natural character of the coastline and key foreshore assets.

These values have been considered alongside coastal hazard investigations and technical engineering assessments in the selection of the preferred protection solution.

The project has secured State Government funding at key stages through the Department of Transport and Major Infrastructure (DTMI) Coastal Adaptation and Protection (CAP) Grant program and the Hotspot Coastal Adaptation and Protection (H-CAP) Major Project Fund.

This funding has enabled the City to progress technical investigations, detailed design and delivery planning for the preferred protection solution, supporting implementation of actions identified through the Northern Beaches CHRMAP.

  • Funding boost to help protect Doddi’s Beach coastline

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    One of Mandurah's most loved and popular stretches of coastline will receive a funding boost to help manage the effects of coastal change.

    The City of Mandurah has secured $1.5 million from the State Government to assist in delivering important coastal protection works at Doddi’s Beach, which has been identified as facing significant and immediate erosion risk.

    City of Mandurah Mayor Amber Kearns said Doddi's Beach held a special place in the hearts of many locals.

    "Doddi's Beach means a lot to our community. It's a place where families spend summer days, locals head for a walk and people come

    One of Mandurah's most loved and popular stretches of coastline will receive a funding boost to help manage the effects of coastal change.

    The City of Mandurah has secured $1.5 million from the State Government to assist in delivering important coastal protection works at Doddi’s Beach, which has been identified as facing significant and immediate erosion risk.

    City of Mandurah Mayor Amber Kearns said Doddi's Beach held a special place in the hearts of many locals.

    "Doddi's Beach means a lot to our community. It's a place where families spend summer days, locals head for a walk and people come to enjoy everything that makes Mandurah so special,” she said.

    "This funding will help us continue important work to manage erosion, protect nearby community infrastructure and plan proactively to preserve this much-loved stretch of coastline for many years to come.

    “We know coastal erosion is a real challenge coastal communities across WA are facing and we're grateful to the State Government for recognising the importance of protecting one of Mandurah's favourite beaches."

    The City will also contribute about $336,000 in cash and $100,000 in-kind support to deliver the project, which forms part of the City’s Northern Beaches Coastal Hazard Risk Management and Adaptation Plan.

    The works will include extension of the existing Janis Street groyne by about 20 metres, beach regrading works, native species planting near the Janis Street groyne, and a geotextile sand container revetment to protect the Robert Point car park.

    The City will continue working with the Department of Transport and Major Infrastructure and the community as the project progresses.

Page last updated: 19 Aug 2026, 01:22 PM