en.Wedoany.com Reported - South32's Taylor zinc-lead-silver project, located in Arizona, USA, will require an additional US$1.1 billion (approximately A$1.5 billion), bringing its growth capital expenditure to US$3.3 billion (A$4.6 billion), a 50% increase over the originally approved US$2.2 billion. This project is the first development within the larger Hermosa project.

Reasons for the increased expenditure include: construction of a new underground decline (US$100 million), updated shaft construction costs (US$450 million), inflationary factors, and US tariffs (US$500 million). Industry-wide price increases for key raw materials such as steel, piping, concrete, and electrical components also drove costs higher.

Despite the cost increase, the ore reserves for South32's Taylor project surged 52% following infill drilling, reaching 99 million tonnes. Mineral resources increased by 10% to 169 million tonnes, extending the initial operating life by 4 years to 33 years, with potential for further extension. Life-of-mine production increased by 17%, comprising 3.7 million tonnes of zinc, 4.6 million tonnes of lead, and 247 million ounces of silver. A total of 95 infill drill holes were completed to optimize orebody definition.

South32 CEO Graham Kerr stated: "Our investment in the Hermosa project has created a regional-scale project with the potential to produce critical minerals for decades to come." He also noted that studies on the adjacent Clark deposit indicate that utilizing the Clark decline infrastructure could provide earlier access to the Taylor orebody, enabling first production ahead of shaft commissioning and increasing ore processing capacity by approximately 25%.

First production is expected in the second half of fiscal year 2028. South32 is a global mining and metals company with assets primarily located in Australia, Southern Africa, and South America.

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