Projects

NTC was awarded the miscellaneous earthworks package to provide earthworks and general civil construction services to the huge Mardie Salt and Potash Project from the inception stage. The works included:

• Vacuum Excavation of holes around services
• Foundation Construction
• Sign Installation
• Roadwork Remediation

The initial works consisted of construction of heavily reinforced concrete slabs on top of 2 Santos and 1 Chevron Natural Gas Pipelines in a remote area of the site.  NTC was responsible for the risk assessment process, earthworks, excavations for the slabs, steel works and concrete installation along with final roadworks. All works were undertaken through a heavily monitored permitting process with full time on site monitoring and supervision by both a Chevron and Santos Representative.

NTC was awarded a 3 year maintenance contract with 2 one year extensions on the Wheatstone LNG Plant. The contract scope is extensive and involves working within a live gas plant to all of the required systems and permits requires. Some key aspects of the scope included:

• Misc Civil and Earthworks
• Traffic Management Signage
• Concrete works including new and modifications to footings
• Non destructive excavations
• Surveying
• Road Construction and Maintenance
• Dust Suppression
• Fencing

NTC joint forces with TAMS group to jointly deliver the removal of RO and WWTP infrastructure.  NTC was responsible for the land based scope and TAMS for the offshore. The core works involved the removal of 5 intake and outfall lines, with the largest being 2.3km long along with concrete slabs and other onshore infrastructure. The works included:

• Removal and Disposal of Anchor Blocks
• Pulling, cutting and removal of HDPE Pipelines
• Concrete Cutting of 600mm deep Concrete
• Removal of Large Concrete Slab
• Recycling of all HDPE pipework

A large 600mm thick concrete slab was previously constructed for the temporary RO plant and consisted of an extremely high level of reinforcing and high strength concrete.
It was decided to use a large concrete saw capable of this size to cut the slab into manageable blocks ready for disposal.

NTC was awarded the contract for the cultivation of over 120,000 native seedlings to be utilised in the rehabilitation of Thevenard Island. The works included:

• Collection of cuttings from Thevenard Island
• Cultivation of seeds and cuttings
• Hardening off of seedlings in Onslow
• Delivery to island transport

NTC Contracting engaged Workpower’s Wholesale Nursery and Environmental Services team to undertake the technical aspects of cuttings, propagation and support during the hardening off process.

Workpower employs people with disability who work alongside industry professionals, while our disability employment services support people to find and maintain employment in the open labour market.

For more information on the first delivery see below:

From propagation to planting, Thevenard Island sprouts – Workpower

NTC was awarded a project through development WA to initially provide dust suppressant to the vacant lots in the Barrarda Estate but also to develop a native seeding plan. The works included:

• Application of Dust Suppressant
• Development of Seeding Program
• Monitoring
• Slashing and Fire Prevention

The initial works consisted of several applications of Gluon a dust suppressant product. After this a seeding plan was developed using natural seeds from the area.  Finally, now that all growth has taken off a slashing program is underway to ensure the growth now does not cause fire hazards

NTC was awarded an earthworks project at the remote Thunderbird project for GR Engineering.  This contract was undertaking all the bulk and detailed earthworks including road works for the processing plant at the Kimberly Mineral Sands Thunderbird project. The works included:

• Bulk Earthworks
• Detailed Earthworks
• Pond Construction
• Roadworks
• Stormwater Drainag

NTC was awarded the repair works for a failed levee wall at the Onslow Salt Mine. This levee had a subsurface spring affecting the integrity of the salt crystaliser. The works included:

• Winning and Hauling Clay Core Material
• Removal of cemented salt
• Installation of a geocomposite grid layer
• Installation of lined panel drains
• Installation of a cuttoff drain with discharge
• Backfill construction of levee using clay core

A very detailed ITP and signoff process was required for these works as they included an intricate design of geocomposite, and panel drains all feeding into a discharge pipeline.

NTC was awarded the manufacturing and installation of 60 signs throughout the new Port of Ashburton. All signs were cyclone rated and engineered to the highest standard. The works included:

• Vacuum Excavation of holes around services
• Foundation Construction
• Sign Installation
• Roadwork Remediation

NTC was awarded the Sand Bypassing project for the second time to bypass 80,000m3 of sand built up between the Port Breakwater. The works included:

• Winning up sand from a design below the low tide level
• Stockpiling and allowing to dry for 7 days
• Transporting sand 3km past the breakwater
• Spreading to design profile
• Drone surveying of all works

Works required planning around the low tides in order to be able to achieve the maximum amount of bypassed sand in the design which was near the lowest astronomical tide mark.  NTC tailored our maximum production shifts around this period in order to make the most of these tides which only happen monthly at best.

NTC was awarded the bulk and detailed earthworks for the HV and LV upgrades at the Rio Tinto Mesa J Iron Ore Mine. The works included:

• Construction of a clean water pond
• Detailed earthworks for all concrete footings
• Bulk earthworks
• Rock Breaking
• Windrow Construction

The works were to be constructed around an active HV workshop which daily had large mine haul trucks moving around the area.

The works were also hampered by a large amount of rock present under the new HV workshop expansion.  Large detailed footings were broken out and completed to the best detail possible.

NTC was awarded the airside upgrade works at the Onslow Airport.  Theses works required NTC to undertake major runway and taxiway works in a live airport environment. The works included:

• Removal of an old Taxiway and full reconstruction of a replacement
• Profiling and Asphalting an old Taxiway to new profiles
• Installation of a Pavement Preservation Treatment
• Re-line marking of all runways and taxiways
• Removal and re-installation of a fuel resistant seal
• Batter repair and stabilisation including rock pitching

Undertaking major works around a live airport was a new scope for NTC to undertake. All works were managed to a defined Method of Works plan that was verified and approved by CASA.

NTC was awarded the second phase of the Ocean View Caravan Park Upgrade.  Theses works required NTC to complete all works through Cyclone season in line with being complete for the start of the tourist Season. The works included:

• New Ablutions Block
• New workshop
• Full Sewer upgrade
• Full Stormwater Upgrade
• Power design and installation for all bays
• Demolition of all old buildings
• Road construction and asphalting