Maroochy Groyne Field Renewal Project
  • Last updated:
  • 29 Jul 2021
Delays may also result from the COVID-19 pandemic. See council's COVID-19 web page for community information regarding council and COVID-19.

The entrance to the Maroochy River migrates due to coastal and estuarine processes. Its location has been both north and south of Pincushion Island since the 1940’s.

Project scope

Renewal of the seawall and four geotextile groynes will be completed in two stages.  Stage 1 was completed in September 2020 and Stage 2 will take place in mid-2021.

Stage 1: Monday 20 April – early September 2020

Stage 1 renewed the two northern-most groyne structures (Groyne #3 and Groyne #4) and the seawall surrounding the Cotton Tree Holiday Park. The work was completed by Halls Contracting and consists of over 2,000 sand-filled geotextile containers.

Closed circuit TV (CCTV) footage is being taken of the finished site. View the finished works via the Thompson Bros website.

Stage 2 will take place in 2021

This stage will focus on the two southern-most groyne structures (Groyne #1 and Groyne #2) as well as a ramp to facilitate emergency access to the north of the site. Council will keep the community updated on Stage 2 schedules closer to the expected start dates.

Where to from here

Council is committed to keeping residents and businesses informed about ongoing works. View the latest Project News[455KB].

Register to receive regular construction updates via email. Please include your details (name, address and email address).


Southern migration in the 1990’s saw erosive pressure occur at the Cotton Tree Holiday Park.

In 2003 council constructed the groyne and sections of seawall to help protect the Cotton Tree Holiday Park and other nearby valuable assets. Some of the existing groyne structure has now deteriorated and needs to be replaced.

Renewal of the Maroochy Groyne will ensure ongoing protection of the Cotton Tree precinct from erosion.

This renewal project is the result of extensive council planning, including a 10-year Shoreline Erosion Management Plan (SEMP) developed in 2014. This plan and the groyne renewal project incorporate sound science, coastal engineering principles, physical modelling, community values and coastal dynamics.

Community engagement

Council undertook extensive community consultation when considering options for the groyne renewal in 2017. This included establishing the Maroochy River Estuary Consultation Group (which has continued to work with council on design options and testing) and seeking wider community feedback.

Council considered this feedback in determining that the existing groyne would be replaced with geotextile bags instead of rock. This consultation was recognised nationally with a 2019 Australian Coastal Award for Community Engagement.


For more information please contact the Project Officer via or Customer Service.