Lawn Hill site
Darimah Village circa 2007 when it was expanded with extra accommodation buildings.
Prior to mine development in the late 1990s, the Century mine lease was low-intensity grazing land and native habitat.
During operations between 1999 and 2016, infrastructure at Century’s Lawn Hill site included the processing plant, buildings, workshops, accommodation facilities, fuel tanks, telecommunications services and an all-weather airstrip.
A 220kV overhead transmission line from the Mica Creek Power Station at Mount Isa provided electricity to the site.
Century’s infrastructure is in a state of Operational Readiness in the event that a future growth option becomes feasible.
Built as part of mine development in the late 1990s, Century’s Karumba Port facility included a dewatering and drying circuit, maintenance workshop, concentrate storage shed and buildings.
After receipt of batches of zinc and lead slurry at Century’s Port facility, water was removed from the concentrate slurry by five pressure filters. Zinc concentrates also passed through a rotary dryer to remove any remaining water. Following this process, product was stockpiled in Century’s concentrate storage shed in preparation for shipping.
Century completed a $32 million three-year project to fully refurbish its concentrate storage shed in late 2012. The project involved replacing more than 11 kilometres of purlins and 300 roof bracing members within the shed structure. As a result of the project, the Karumba concentrate storage shed now holds a Category Four cyclone rating.
MMG was recognised with a High Commended Award at the Australian Institute of Project Management (IPM) for the project in 2013 (read article).
Like Lawn Hill, Century’s infrastructure at Karumba is being kept in a state of Operational Readiness in the event that a future growth option becomes feasible.
Century dewatering and shipping infrastructure at the Port of Karumba.
Century’s transfer vessel, the MV Wunma, was custom-built for the shallow waters of the Norman River channel and is used to transfer parcels of concentrate to export ships anchored in the Gulf of Carpentaria.
Pronounced ‘Wood-MA’, the transfer vessel’s name means storm bird in the Lardil language of Mornington Island.
Self-loading and discharging, the MV Wunma was specially built to navigate the shallow waters of the Norman River channel and Gulf of Carpentaria. It took about 12 hours for the vessel to load, transport and discharge concentrates and return to the Karumba Port. The vessel operated day and night, depending on tides and weather conditions.
While in use, ongoing maintenance was conducted on the MV Wunma to ensure safe and reliable operations. This program included dry-dock services every four years, which allowed crews to carry out essential maintenance to the underside and other parts of the vessel that could not be accessed while the MV Wunma was on water. Engineers also checked all underwater marine components of the vessel during dry-dock, including its propellers, shafts and bearings.
Four dry-dock services were conducted on the MV Wunma since its commissioning in 1999. The last dry-dock service was undertaken in 2014, when the vessel was sailed to Singapore for Lloyds re-certification and dry-dock maintenance.
In line with MMG’s commitment to safety, Century partnered with the Queensland Government to install next generation lights for the Port of Karumba (read article). Century provided $60,000 of funding for the high intensity LED lights at the entrance of the Norman River channel. Ownership of the lights has now passed to Maritime Safety Queensland (MSQ).
During Century’s operations, MMG and previous owners of Century dredged the channel to allow shipping without the limitations of tidal movements. Dredging of the channel by MMG ended in line with the completion of shipping.
A panoramic view of the Wunma (background) dockside at Century's Karumba port facility.