Pearl bay seawalls

The main seawall case study areas for this projects are Cremorne Point and Careening Cove. But seawalls account for much of the harbour and inner harbour foreshore. As we know, traditional seawalls are poor replacements for natural shores as they provide little habitat for plants and animals. University of Sydney research has shown it is possible to increase the number of plants and animals on a seawall by engineering spaces for sea life to flourish.

You have seen Mark Browne’s flowerpot method but another such initiative is Mosman Council’s Spit Improvement Project which has seen the construction and improvement of seawalls and marine habitat creation.

As you will see from the following photographs, a ‘boulder field’, replecating a natural rocky shore, has been added to existing concrete walls to provide shelter for small fish, molluscs and other intertidal animals unable to shelter against a sheer surface. It also provides structural support to the seawall base and protection from waves. 

The 'boudler field' created, on top of an existing seawall, to encourage more marine life in Peal Bay


Nooks and crannies for intertidal life to flourish in


Public access


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Filed under Putting it in context, Sydney Harbour (seawalls), Visuals

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