Luderick Point, Bemm River - Boat Ramp & Infrastructure Upgrade

GPM has completed construction of a new dual lane boat ramp and new southern pontoon system, with upgrades to existing northern pontoon and abutment. The upgrade includes new overhead solar lighting, and a davit crane for disabled access from the pontoon.

Armory Wharf Café Seawall Re-stabilisation-  Olympic Park

GPM stockpiled the existing Rock armour in front of the sea wall creating a cofferdam like detail to prevent further erosion from boat wave action. While the coffer dam was in place, GPM removed the failing substrate material from behind the existing seawall and replaced it with a combination of layers of basalt, crushed sandstone and DGB20 all wrapped in Geofabric. The existing rock Armour was then replaced with additional 400mm dia basalt, to ensure no further erosion would occur.  The Construction program was 8 weeks.


Coffs Harbour Moorings &  Unloading Wharf UPGRADES

GPM has completed mooring upgrades to the commercial berthing facilities at Coffs Harbour Marina.

Refurbishment of the inner-harbour break wall has been completed, including the regrade and reforming of batters with the supply and install of new primary and secondary rock armour.

Coffs Harbour Marina Breakwall Rectification Works

GPM Constructions has completed refacing Coffs Harbour Marina South West Break wall, including repairs and stabilisation of break wall access road.

Ettalong Wharf Upgrade

GPM Constructions has completed works to improve the Ettalong Ferry Wharf. A new floating pontoon and DDA compliant gangway have been installed with solar lighting, ensuring improved public access to this popular berthing facility.

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Bressington Park Sports field Redevelopment

GPM has completed preliminary works at the Bressington Park sports field redevelopment site with the import, placement and grade of 6,000 cubic metres of topsoil.

The final design includes

  • 140 space car park (for the public using Bressington Park, and to be used as an overflow car park for the adjacent Mason Park)
  • 3 playing fields (two currently located on the bottom field, and one new playing field to be constructed on the top mound)
  • A new amenities block with home and visitors change rooms, which include a kiosk and public toilets
  • Australian Korean Memorial Garden with a 200sqm pavilion, reflection pond and two shelters

Lyne Park Seawall Stage 3

A continuation of Lyne Park Seawall Reconstructions North, South and Stages 2 and 2.1 for Woollahra Council. This contract was to replace approximately 80 lm of the existing wall with new 300 x 300 x 800mm faced sandstone blocks.

To control damage to the wall during construction, GPM installed sheet piling in front of the proposed new wall which eliminated wave action.

Construction period was 4 months.

Ettalong Channel Dredge

GPM Constructions has completed dredging approx. 10,000 cubic metres of sand to widen and increase navigational depth for access by larger vessels.


Madeline Street Bioretention System

GPM Constructions has completed preparation and irrigation of a new bioretention system for Strathfield Municipal Council.
The bio-retention system involves the diversion of stormwater runoff from the existing stormwater pipe in Madeline St/Cleveland St that traverse the site. The pipe flows are to be intercepted and directed into the bioretention system via a Gross Pollutant Trap (GPT).

Lower Portland Ferry, Piling

On behalf of Hawkesbury City Council, GPM Constructions has completed the upgrade of Lower Portland Ferry berth. Works included installation of 4 new piles with mooring float tie-off points, as well as a new heavy duty concrete mooring block.

These works will allow the Lower Portland Ferry to be moored safely in high flood conditions.

Rosebay Beach Dredge

The dredging and selective beach replenishment of Rosebay Dog Beach, consisting of 5,000 cubic meters of sand, has been completed with GPM working closely with Council and the community to return the beach to a safer and more functional area.


Lyne Park Rosebay Sheet Piling

GPM has completed progressive sheet piling across approx. 300m of the face of the Lyne Park Seawall Rosebay. The driven sheet piling achieved a temporary cofferdam for stonemasons to access the tidal section of the seawall normally inaccessible due to tidal activity.


Marine Rescue Middle Harbour

GPM has completed demolition of existing timber gangway/associated piles, and the installation of 28 meters of new aluminium gangway supported by steel sleeved piles. Due to the location, all site access, deliveries and works were performed from one of GPM's barges.


Blackwattle Bay Borehole Drilling

GPM recently undertook borehole drilling in Blackwattle Bay, Sydney Harbour. Providing barge and crew services for borehole drilling rig, and Engineers taking approx. 15 bore hole samples at depths up to 20m.

Dumaresq Reserve Seawall Repair

This seawall failed during the June 2016 Storm, and required emergency repair to avoid further failure and erosion. GPM were able to commence work immediately from appointment and complete the remediation/renewal of the wall within 4 weeks.

Lower Portland

Due to erosion of the riverbank and undermining of existing structures, GPM are constructing a new rock wall approx. 100m long using rocks up to 5 tonne each. Works include installation of a single lane precast boat ramp usable at all extreme tides.

Tathra Wharf Upgrade

GPM has completed structural repairs on the iconic Tathra Wharf, replacing piles and headstocks as well as approximately 400m2 of decking.

Narrabeen Lagoon Dredging 2016

GPM was recently engaged by Northern Beaches Council for dredging works and beach replenishment at North Narrabeen.

Royal Prince Alfred Yacht Club

GPM has completed demolition of the old concrete jetty, and has replaced it with a new floating pontoon jetty which includes a stub jetty and floating walkway.

Koolewong Marina

Installation of piles for new floating marina.

Glebe Oxley St Jetty

Complete refurbishment of existing jetty for Roads & Maritime Services.

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Mallacoota Dredge

Clearance dredging at new Bastion Pt Ocean Access channel after heavy storms forced a large migration of sand inhibiting vessel access. Approx. 4500 cubic meters of material dredged.

Lyne Park Seawall Stage 2.1

A continuation of past projects Lyne Park Stage 1 and 2. GPM were contracted by Woollahra Municipal Council to renew another 60 lm of the failing seawall.

Metung Marina Stage 2

GPM has successfully completed the design and construct of Stage 2 of Metung Marina, including 550lm of fully serviced floating concrete pontoons and gangways.

Kianinny Bay Jetty Upgrade

 Kianinny Bay Jetty upgrade consisting of demolition of existing timber jetty with construction of new suspended concrete deck, walkway and abutment. This structure was supported by piles socketed into rock. 

Port Albert

GPM has completed upgrades to Boat Harbour, Port Albert and Victoria, with new timber piles including stainless steel mooring bars and fibreglass caps.


Corner Inlet Navigational Aids Upgrade

GPM has completed the replacement of navigation aid piles, including UV stabilised UHMW day-shapes & solar powered / GPS enabled marine lanterns in Corner Inlet, which is a major shipping gateway servicing gas & oil rigs in Bass Strait.

Quarantine Bay Storm Repairs

GPM was recently engaged by Bega Valley Shire for post storm structural repair to Quarantine Bay Jetty Pontoon, and the installation of two new steel piles.

Swansea Dredge

Swansea Channel was dredged to widen and increase navigational depth for access by larger vessels. Sand was pumped 350m to a nearby island for beach nourishment. 4500 cubic meters of material dredged.

Sydney Seaplanes

GPM recently undertook the demolition of the iconic Sydney Seaplanes Headquarters at Rose Bay Sydney, as well as the design and construction of a new piled and precast concrete foundations. Difficult site conditions were overcome with strict planning and management, which was critical to completing the job to specification. Works were executed through April To June 2016.

Killcare Marina

Installation of piles for new floating marina.

Huskisson Rock Dredge

GPM dredged rock at the entrance of Currambene Creek for Shoalhaven City Council, enabling safer and easier passage through the busy channel which is popular with local tour operators and leisure craft.

brooklyn Boat Ramp

GPM has constructed a new boat ramp at Parsley Bay, giving our region’s water lovers far better access to the Hawkesbury River.

A new pontoon has also been added, which will significantly speed up the boat turnaround and reduce the waiting time. This is good news for one of Sydney's most popular boat ramps.

Clifftonville Piling & Pontoons

Design and construction of new fuelling pontoons at Clifftonville Ski Lodge.

Lyne Park, Seawall Rebuild Stage 2

Rebuild of Seawall between Catalina's and Sydney Seaplanes.

Mogareeka Boat Ramp

GPM recently undertook the construction of a new 2 lane, piled, beamed and pre-cast boat ramp, with rock walling and stone groyne.

Exploratory Drilling Of Blackwattle Bay

GPM was working closely with JK Geotechnics for extensive exploratory drilling, for the proposed Bays Promenade Boating Facilities. 

Northbridge Domestic Timber Jetty

GPM Constructions demolished and reconstructed a 12m by 1.8m long timber jetty with an attached floating pontoon.

Cooper Park Creek Restoration

After heavy falls GPM were appointed by Woollahra Council to complete this emergency clearance and remediation work, which included new stone block walls and rock armouring to base of culvert.

Port Macquarie Wharf Upgrade

Complete refurbishment of Port Macquarie marine rescue jetty.

Brooklyn Embankment Stabilisation Works For Sydney Trains

Installation of piles, horizontal walers and reinstatement of road.

Cunningham Arm Piling

Contracted to carry out the piling portion of the project, GPM installed 6 steel piles used to support the proposed, fixed, pre-cast concrete jetty, and 2 larger and longer pontoon piles. All piles were cut to height, and HDPE sleeves were installed in preparation for other works carried out by another contractor.

Eden Harbour Salvage

Divers were used to clean up the harbour floor at Eden as part of the preparation works for the future development in that area. From old anchors, tyres, to old steel sheets used to repair ships, GPM salvaged over 100 tonnes of material off the floor and disposed of it all off site.

Snug Cove Jetty

The Eden crew transfer wharf at Snug Cove was upgraded to accommodate the anticipated increase in usage. New timber decking and galvanised handrail was supplied and installed to improve overall usability.

Mallacoota Post Storm Breakwall Repair

A large storm caused significant damage to the break wall at Bastion point Mallacoota, and urgent repairs were required. The repairs were carried out by our 45t Komatsu excavator from the crest of the wall using salvaged rocks that were moved from the wall by waves, and additional rock was imported to increase the structural integrity of certain portions of the wall.

Rosebud Pier Reconstruction

Demolished and rebuilt the first 225m of the Rosebud Pier for Parks Victoria as part of the stage two major maintenance works to the Pier.

Wonboyn Lake Boat Ramp & Jetty Reconstruction

The existing timber jetty and the concrete boat ramp was demolished to make way for a brand new floating pontoon and concrete boat ramp. The carpark was also refurbished by widening in some areas, and new asphalt and line making installed.

Metung Marina Stage 1

The design and construction of Metung Marina for East Gippsland Shire Council involved the demolition of the existing 450m of a dilapidated timber marina, and replacing it with a newly built steel and timber structure 500m in length. There is a combination of steel and timber piles totalling 250 piles, all of which are 24m long. The structure itself will be timber with a fibreglass mini-mesh decking. 

QUARANTINE Bay Floating Pontoon

Repairs to the aluminium gangway and structural work to the floating pontoon.

Pambula Lake

Complete refurbishment of floating pontoon and aluminium gangway.

Fairy Bower pool gate valve replacement

Contracted by Manly Council, GPM removed the faulty gate valve at Fairy Bower pool. The pool was emptied and closed to the public to allow divers to access the existing valve, remove it, and replace it with a new one.

Parsley Bay Bridge Refurbishment

GPM Constructions were contracted by Woollahra Council to fully refurbish the 50m long heritage pedestrian bridge at Parsley Bay. This project involved extensive remediation work and replacing of the existing bridge components. Being an extremely delicate project due to the old protective coatings being harmful to the environment, GPM had to ensure the appropriate care was taken during demolition and disposal. The project was carried out progressively along the bridge a section at a time, with great effort to ensure that all works were encapsulated and environmental controls were implemented at all times.

Bluff Point Mooring Pile

Roads and Maritime Services contacted GPM to install 3 mooring piles for the Bluff Point Ferry. The piles are designed to secure the ferries during time of flood, and as such were required to be 23m long. Using a 130t crane, we pitched the piles and drove the piles into the riverbed using a 9t Junttan hammer.