Seawall Construction Project

A number of projects are currently underway along the coastline addressing the health of our beaches including beach nourishment, seawall construction and dredging.

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Seawall Construction Project

The construction of seawalls forms part of our shoreline management response to coastal erosion.

Our seawalls, located along an invisible coastal boundary known as the A-Line (alignment parallel to the foreshore set by the State Government), are designed to be our city's last line of defence against erosion.

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We are boosting our sea defences by delivering an extensive public seawall upgrades program as part of the Ocean Beaches Strategy 2013-2023.

Over the past 12 months we have completed $6.8 million worth of works to protect public infrastructure at Kurrawa, Broadbeach, Narrowneck, Main Beach, and Currumbin Creek, Palm Beach.

Recently the renewal of a 230 metre section of seawall at the Southern end of Narrowneck, Main Beach was completed. The dunes have been reinstated and revegetation works are commencing in November 2017.

The renewal works of a section of rock wall, known as the Connecting Arm of the Northern Training Wall at Currumbin Creek was also recently completed.

The City of Gold Coast also conducts condition inspections of existing seawalls. As a result of these inspections, almost four kilometres of existing seawalls were able to be re-certified, saving the City some $15 million in seawall construction costs over recent years.

For more information about the Gold Coast's seawalls, watch our Last Line of Defence video:

View the 'Last Line of Defence' video transcript below.

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  • Why is the City of Gold Coast undertaking the works?

    City of Gold Coast has recurrent funding allocated to upgrading and maintaining the boulder walls along the foreshore. This funding is allocated to areas of priority each financial year.

  • Will this stop erosion along the foreshore?

    The seawall wall is designed to be the last line of defence against erosion. The walls are designed to stop the erosion at the A-Line (alignment parallel to the foreshore set by State Government).

    Erosion east of the wall is not mitigated by the armour rock and natural sand erosion may still occur during storm or high wave events.  

    The wall is design to resist a one in 100 year cyclone event however, events may occur which are greater than these design parameters.

  • Why wouldn’t the wall be designed to stop all events?

    The additional cost to increase the protection would not be cost efficient. The likelihood of an event of greater than 1 in 100 is small.

    Views would be lost because the wall may need to be increased in height.  

    This may also cause stormwater issues along the foreshore because of the current height of floor and road levels.

  • Why is this work to be constructed now?

    This area has been reviewed and identified as one of the remaining sites that require work by the City of Gold Coast. The priorities change due to weather events or age of existing walls.

  • What will be the finished visual appearance?

    The boulder wall will be buried with sand and the foreshore will be reinstated. Foreshore paths, furniture and vegetation will be restored, similar to the northern end of Marine Parade, Miami.

  • Why wasn't this area upgraded earlier?

    The City prioritises which sections of sea wall need to be replaced by investigating and reviewing the current condition of existing sea walls.

  • Why are old walls being replaced?

    During extreme weather events old sea walls in poor condition may slump or fail, so these sections are being systematically replaced to improve the resilience of community infrastructure to coastal erosion.