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A new life for the 15 Mile project

October 13, 2023

St Barbara has released its pre-feasibility study (PFS) results for its wholly owned 15 Mile project.


The 15 Mile project, formerly known as the Fifteen Mile Stream gold project, is located in Nova Scotia, Canada as part of St Barbara’s Atlantic operations.


St Barbara said the project has been modified from producing flotation and gravity concentrates to delivering gold dore bars through conventional gravity and carbon in leach cyanidation techniques.


“The change of project design allows for the reuse of the existing Touquoy processing plant, reducing the capital expenditure from previous management estimates and improving overall gold recoveries from direct whole ore leach as opposed to leaching of concentrates,” it said.


“The project design layout has undergone a complete revision to achieve minimal disturbance and maximum capital and operating cost efficiency.”


Highlights from the PFS results include the project’s ore reserves increasing by seven per cent to 618,000 ounces, and its mineral resources also increasing by seven per cent to 836,000 ounces.


The project is expected to have a stable production, with an average of 55,000–60,000 gold ounces produced per annum over the 11-year life of mine (LOM).

Post tax, the project’s net present value equals to $198 million, and its rate of return is 20.3 per cent.


Its initial capital of $207 million includes mine pre-production, mine fleet, processing, and infrastructure such as a tailings facility. Its LOM all-in sustaining cost is estimated to be $1445 per ounce.


“With this strong PFS result, St Barbara will now focus on preparation of an updated environmental and social impact assessment for this new standalone design of the 15 Mile project,” St Barbara managing director and chief executive officer Andrew Strelein said.



“St Barbara is looking forward to working with Nova Scotia to create hundreds of well-paid rural jobs and to remediating the historical tailings at the site. The feasibility study engineering is intended to be ramped up as we see progress towards environmental approval with commencement of development entirely achievable in mid calendar 2026.”


Source: https://www.australianmining.com.au/a-new-life-for-the-15-mile-project

Queensland breaks ground on CopperString

July 9, 2024
The Queensland Government has broken ground on the first construction works of the $5 billion CopperString project. Work commenced yesterday on the CopperString projects’ first and largest workforce accommodation site. The site will house those charged with building the project’s 840km high-voltage transmission line that will connect Mount Isa to the ‘SuperGrid’ for the first time. The workforce accommodation will house up to 550 construction workers at its peak. These workers will construct a nearby substation and progress early stages of the transmission line development heading west from Hughenden out to Mount Isa. Supercharging the state’s north-west aims to unlock Queensland’s $500 billion north-west minerals province. It’s expected CopperString will be complete in 2029, weather and construction conditions permitting. Queensland Premier Stephen Miles said CopperString is the biggest ever expansion to the state’s publicly owned energy system. “Queenslanders deserve cheaper, cleaner, more reliable energy – to power their homes, our schools, hospitals, shopping centres and more,” Miles said . “CopperString will be the catalyst for transforming Queensland’s north and north-west – opening up mining opportunities, creating more jobs and unlocking critical minerals which will be essential in developing renewable technologies. “This is the start of a long and exciting future for the region and our state.” Commencing later this month, project owner, Queensland Powerlink, will be offering free sessions for businesses along the CopperString corridor to build their capabilities. The program includes five workshops and one-on-one assistance to help businesses build confidence to bid on major projects and supply chain work in the region. “All of North Queensland understands the immense opportunities that CopperString presents for local jobs both directly and indirectly which is why this is such a momentous day,” Resources and Critical Minerals Minister Scott Stewart said.  “Critical minerals are the next big boom for the resources industry and the feedback I’ve had from companies is that this project is key to unlocking those opportunities.” Source: https://www.australianmining.com.au/queensland-breaks-ground-on-copperstring/

Showcasing the best in underground mining

July 8, 2024
Underground mines are busy places, and it’s vital companies are on top of their processes to enable an efficient and safe underground operation. Whether it’s having the best equipment to drive higher production, maximise return on investment, minimise waste or keep workers out of harm’s way, mining companies benefit from understanding and investing in the right underground technologies. Source: https://www.australianmining.com.au/showcasing-the-best-in-underground-mining/

BHP goes green at ‘world’s largest’ copper mine

July 8, 2024
BHP has started environmental processing to have the transport at its Escondida copper mine in Chile transitioned to an electric trolley system. The Big Australian will invest around $US250 million ($371.6 million) in the project at Escondida, which it owns in a joint venture with Rio Tinto. The funds will go towards installing key infrastructure to electrically assist the movement of extraction trucks in areas where the highest fuel consumption currently takes place. BHP has submitted an environmental impact statement to the Environmental Impact Assessment System in Chile. “The electric trolley system is one of the initiatives with which we seek to move towards a safer and more sustainable way of operating hand in hand with technology,” BHP Escondida president Alejandro Tapia said . “This project will allow us to reduce the fuel consumption of our extraction trucks and thus advance our goal of net-zero operational greenhouse gas emissions by 2050.” The project includes the construction of a new electrical substation and transmission lines both inside and around the Escondida Norte pit. These facilities will electrically assist the movement of trucks inside the mine in the areas where they go up loaded with ore and, consequently, consume more fuel. With this new technology, instead of using diesel, they will be propelled by electrical power, reducing greenhouse gas emissions and improving productivity associated with truck performance given the higher travel speed. Once construction kicks off up to 160 jobs are expected to be created. The trolley project is in addition to other technological transformation initiatives that the company maintains in different stages of study and execution, including the progressive incorporation of autonomy in its mining equipment.  To date, Escondida has six autonomous trucks in full operation and by 2025 it expects to have the largest fleet of autonomous equipment in South America. Source: https://www.australianmining.com.au/bhp-goes-green-at-worlds-largest-copper-mine/
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