Seawall protection

Seawalls act as a last line of defence, they protect coastal infrastructure and property from storms.

About half of our metropolitan coastline is protected by seawalls - a length of 14 kilometres. Most of the seawalls are south of Grange; at Henley Beach, West Beach and from Glenelg North to Seacliff (apart from the Minda and West Beach dunes areas).

Early seawall designs were often solid concrete structures, but since the 1960s most seawalls have been built and repaired using large boulders and rocks. This allows them to better absorb wave energy.

Ongoing beach replenishment has slowed the unavoidable damage to seawall infrastructure. However, the forces of the sea are such that many of our seawalls are inadequate and, in the future, they will need repair.

More information 

Refer to our reference material page.