Marine Infrastructure

The WA Limestone Group specialises in marine rock works in both limestone and granite. We have extensive experience in breakwater construction and the production of various rock sizes for underwater gas pipes as cover protection in the ocean.

Marine Construction Experience

We have extensive experience in the construction of breakwaters, seawalls, groynes as well as production of various rock sizes for underwater pipe cover protection in the ocean.

We have the in-house experience to;

Source the rock
Drill, blast and manufacture core and armour rock
Transport materials
Place materials to specification design
Conduct land based dredging works
Implement and operate GPS survey control

With decades of experience, the WA Limestone Group has established itself as a leader in marine infrastructure, delivering complex projects such as, marinas, and coastal protection works across Western Australia

Our Marine Expertise

Breakwaters

A breakwater is a vital marine engineering structure designed to protect harbors, marinas, and coastal areas from the destructive force of waves, tides, and storm surges. Typically constructed using durable materials like limestone, blue metals, breakwaters work by either absorbing or deflecting wave energy before it reaches the protected area.

Seawalls

A seawall is a vertical or near-vertical coastal defense structure built parallel to the shoreline at the transition between beach and mainland, serving as a critical barrier against coastal erosion and flooding. Unlike breakwaters which are built offshore, seawalls are built directly along the coast, creating a hard engineered barrier that, aims to prevent further erosion of the shoreline while protecting upland structures and infrastructure from wave damage and flooding.

Groynes

A groyne is a rigid hydraulic structure built perpendicular to the shoreline, extending from the beach into the sea, that serves as a coastal defense mechanism against erosion. These structures are specifically designed to reduce longshore drift and prevent beach erosion by intercepting the natural flow of sand and sediment along the coast.

Marine Projects

Bunbury Waterfront Redevelopment

In November 2024, WA Limestone, in collaboration with Italia Stone Group, was awarded a $70 million contract for the construction of a breakwater as part of the Transforming Bunbury’s Waterfront project.

Ocean Reef Marina

WA Limestone constructed 2.5 kilometres of breakwaters and revetments that extended up to 8 metres above sea level

Optus Stadium Precinct

WA Limestone was involved in the development of the Optus Stadium and Matagarup Bridge precinct, providing both civil works and material supply for the broader area.

WA Limestone successfully completed the Broome Town Beach Groyne Upgrade in April 2020, transforming the aging structure as part of a broader development of the Town Beach precinct.

Augusta Boat Harbour

WA Limestone supplied and installed 500,000 tonnes of rock to create the 800 metres of breakwaters that extended up to 7 metres above sea level.

HMAS Stirling / Garden Island

WA Limestone delivered the Maritime Structures Causeway Remediation for the HMAS Stirling Stage 3A redevelopment on Garden Island, Western Australia, completed between August 2017 and August 2018.

WA Limestone contributed to the Elizabeth Quay development by supplying limestone and granite products used in the construction of key architectural and landscaping features.

Port Geographe Reconfiguration

WA Limestone installed 450,000 tonnes of rock for the 1.2 kilometres of breakwaters and revetments that extended up to 6 metres above sea level.

WA Limestone undertook a comprehensive redevelopment of the Esperance Port over a two-year period in 2000, delivering substantial infrastructure enhancements for the Esperance Port Authority.

Darwin Rock Supply

For the Darwin Rock Supply project in 2000, WA Limestone provided 120,000 tonnes of granite armour rock to Thiess Contractors on behalf of the Northern Territory Government.

Hillary’s Boat Harbour

WA Limestone, in a joint venture with Italia Stone Group, constructed a 2 kilometre seawall, which included the supply, transport and installation of 800,000 tonnes of limestone core and armour.

WA Limestone constructed 2.5 kilometres of breakwaters and revetments that extended up to 8 metres above sea level.

Dongara (Port Denison) Boat Harbour

WA Limestone was responsible for the construction of 2 separate 400 metre seawalls, which included the supply, transport and installation of approximately 300,000 tonnes of limestone core and granite armour.

WA Limestone worked as the seawall and excavation specialists on the Dawesville Cut. The project included drill, blast, transport and installation of 500,000 tonnes of limestone core and armour.

Fremantle Sailing Club

WA Limestone constructed a 1 kilometre seawall at the historic club, which included the supply, transport and installation of 500,000 tonnes of limestone core and armour.

Other Major Projects

The WA Limestone group of companies has been involved in some of Western Australia’s largest infrastructure projects.