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Case Study

C.Y. O’Connor Erosion Prevention

C.Y. O'Connor Erosion Prevention Subcon > Case Study Background C.Y. O’Connor Beach, situated along the coastline of Perth, has historically experienced significant coastal erosion issues, with the shoreline eroding by more than 50m over the past 20 years.  The erosion resulted in significant dune loss

Morecombe Bay Case Study

Morecombe Bay Case Study Subcon > Case Study Subcon Solution Subcon was contracted by Allseas for the provision of grouting services and grout material on two drilling platforms that are to be decommissioned on the UK Continental Shelf. In June 2021, offshore services firm Allseas

North Metro Artificial Reef

North Metro Artificial Reef Subcon > Case Study Subcon Solution DPIRD approached Subcon for an artificial reef solution off Hillarys to be used for recreational purposes including fishing and diving. This region is predominately sand with no structure for marine life to congregate to. Our

Amrun Dolphin Grouting

Amrun Dolphin Grouting Subcon > Case Study Client: McConnel Dowell Constructors As part of the Amrun wharf construction in North Queensland, Australia, McConnel Dowell Constructors contracted Subcon to grout the pile/leg annuluses of seven jacket structures. In total 324m3 of grout was used to complete

Amrun Port Terminal Scour Protection

Amrun Port Terminal Scour Protection Subcon > Case Study Client: Bechtel (Rio Tinto) The Amrun project includes the construction of a range of infrastructure required to support Bauxite mining and production including a processing plant and port near Boyd Bay, a dam, tailings storage facility,

APLNG RORO Protection

APLNG RORO Protection Subcon > Case Study Client: Bechtel As part of the port upgrades for the new build LNG terminal, the Fisherman’s Landing Roll-on, Roll-off (FLNE RoRo) Ramp required additional scour protection for the larger vessels now frequenting the port. Subcon scope Supply scour

Brighton Breakwater Remediation

Brighton Breakwater Remediation Subcon > Case Study Client: HOP (Brighton Marina Estate Management) The breakwater surrounding Brighton Marina consists of 110 ballast filled caissons +10m radius. For stability and design-life-extension, it was required to remove the existing caisson ballast and re-fill them with mass pour

Cape Preston Berth Pocket

Cape Preston Berth Pocket Subcon > Case Study Client: Citic Pacific To accommodate a new 170m long vessel, Citic Pacific required the port’s berthing pocket to be deepened from 10m to 11m. The existing rock revetment had been sized for smaller vessels and needed stabilisation

Chevron Wheatstone Annulus Plug

Chevron Wheatstone Annulus Plug Subcon > Case Study Client: Technip On Chevron’s Wheatstone platform communication between the ocean and the annulus was observed, corrosion mitigation was critical to maintain both the J-Tubes structural capacity in the high current environment and its integrity as it passes

Wheatstone J-Tube and Flowline Stabilisation

Wheatstone J-Tube and Flowline Stabilisation Subcon > Case Study Client: Technip Offshore facilities to gather and partially process gas and associated condensate and deliver it onshore for further processing. Key offshore components include: Well infrastructure and subsea installations  Gas processing platform in 73m of water