What Lies Beneath: Gold Coast’s sea wall

The Gold Coast Seawall has been a fixture on Gold Coast beaches since the 1900s. But how much do you know about its history, its purpose and what its current condition is?

Griffith Centre for Coastal Management and Engineers Australia present a detailed talk on Seawalls: Protecting the Coast: What Lies Beneath.
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There’s evidence of timber walls built to protect roads as well as to protect houses constructed on the dunes from the impact of storms and erosion along the coast.

During the cyclonic period of the 1960s and 1970s, storms created scarps which extended landward past the boundaries of many beachfront properties. The waves and wind seriously damaged buildings and affected the structural integrity of many houses.

As a response, the State Government, Gold Coast City Council and many of the residents who owned property adjacent to the beach built protective walls along the beach front in to protect property and other structures from future attack.

In the majority of cases, these walls were constructed directly on the then existing erosion scarp, which became known as the A-line.

Following detailed studies which began in the 1970s, Council developed a standard design for the construction of the seawall, which acknowledged the dynamic nature of the coastal environment.

The seawall would be buried in sand during periods of calm weather and exposed during periods of stormy conditions.  A full review of the development of the A-Line seawall including its coverage of the coastline, alignment and design will be discussed.

Current status investigations are aimed at evaluating the present condition and damage modes of the existing seawalls after long term service. Some of the investigative methods included bore holes, Ground Penetrating Radar (GPR) and peel back of the armour layers. The usefulness of GPR and peel-back techniques will be presented during the evening. Speakers will include Professor Rodger Tomlinson, Adjunct Research Fellow Angus Jackson and City Officer Kim Bora.

If you have ever wanted to know more about what lies beneath our dunes and what coastal management techniques Council have put in place to help with the impact of future sea level rise and storm events then join this special presentation on Wednesday March 25 at 6pm.

To RSVP email gccm@griffith.edu.au or phone 5552 8506. More information is also available online. .

Free parking available to guests (please include a request for parking in your RSVP) and refreshments will be provided on the night.

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Seawalls: Protecting the Coast: What Lies Beneath, a presentation by Griffith Centre for Coastal Management and Engineers Australia | Wednesday 25 March, 6.00pm, Griffith University Library. RSVP: gccm@griffith.edu.au.

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