DMC Mining Services says it will construct the Clark exploration decline at the South32-owned Hermosa site in Arizona, USA, as part of a recent contract award.

In an announcement last month, South32 said the board had provided the final investment approval to develop the Taylor deposit, part of the wider Hermosa project, with funding of $2.16 billion. This followed the release of a feasibility study outlining a circa-4.3 Mt/y operation with average payable zinc-equivalent output of circa-253,000 t/y over a 28-year mine life.

Beyond Taylor, however, South32 has been working on its Clark development option, currently the only advanced project in the USA with a clear pathway to produce battery-grade manganese from locally sourced ore, according to the company.

In May 2023, South32 released the results of a selection phase pre-feasibility study (PFS-S) for the Clark deposit, which confirmed the potential for an underground mine integrated with Taylor, and a separate process plant, capable of supplying battery-grade manganese. Study work has progressed to a definition phase pre-feasibility study, with South32 confirming the commencement of construction of an exploration decline, due to be completed in late 2025, to enable access to ore for demonstration-scale production. This is where DMC Mining comes in.

In announcing this contract award, DMC Mining said: “Throughout the meticulous planning phase, South32 and DMC have been united by a shared vision and unwavering values, setting the stage for unparalleled success. Together, we’re not just setting the bar, we’re raising it, ready to redefine industry standards!

“This project not only underscores our commitment to delivering superior project solutions, but also signifies a significant stride in our dedication to serving our clients in the US market.”