Aureka Limited Finalizes Toll Milling Deal with Wedderburn Gold Processing Mill to Boost Production

4 min read | July 14, 2026 10:46 AM AEST | By Sonal Goyal

Aureka Limited has secured a pivotal binding toll milling agreement with the Wedderburn Gold Processing Mill, enhancing its production flexibility across projects such as the Comstock Gold & Silver Project. This agreement also opens the door for potential capital upgrades at the mill, supporting Aureka’s future production ambitions.

Key Points

  • Aureka Limited (ASX:AKA)
  • Binding toll milling agreement established with Wedderburn Gold Processing Mill
  • Agreement applies to ore from any Aureka-designated project
  • Investors to monitor developments on the Comstock Gold & Silver Project

Comprehensive Details of the Toll Milling Agreement

Aureka Limited has entered a binding toll milling agreement with High Grade Holdings’ Wedderburn Gold Processing Mill, offering toll milling services on a cost-plus-margin basis for any project nominated by Aureka. This arrangement provides significant flexibility, enabling processing of ore from multiple projects including the Comstock Gold & Silver Project and the Irvine Gold Project.

The agreement extends for three years from the start of production and includes provisions for Aureka to finance necessary capital improvements to the mill. These upgrades are intended to meet specific production volumes or metallurgical requirements, optimizing processing capabilities for Aureka’s ore.

Strategic Role of the Comstock Gold & Silver Project

Located roughly 45 kilometers from the Wedderburn Mill, the Comstock Gold & Silver Project is Aureka’s primary production target. The company is advancing this project through studies and diamond drilling aimed at establishing a low-capital, rapid production operation. Proximity to the Wedderburn Mill offers strategic advantages by potentially lowering transport costs and enhancing operational efficiency.

Aureka’s recent submission of a production license for Comstock highlights its dedication to bringing the project online. The toll milling agreement is expected to improve the project’s economic viability by increasing mill utilization and reducing unit processing costs.

Long-Term Potential for the Irvine Gold Project

Beyond Comstock, the toll milling agreement provides a processing option for the Irvine Gold Project, situated in the Stawell Corridor. This larger, earlier-stage project could benefit from Wedderburn’s processing capabilities. A high-level Concept Study is planned to evaluate the feasibility of processing Irvine ore at the mill.

This strategic flexibility allows Aureka to explore Irvine’s potential without immediate capital outlay on new processing infrastructure, positioning the Wedderburn Mill as a key asset in future development plans.

Mill Enhancements and Infrastructure Readiness

The agreement permits Aureka to sponsor and fund mill enhancements, including additional crushing circuits, gravity separation systems, and water management infrastructure. These improvements aim to customize the mill’s capabilities to Aureka’s ore processing needs, maximizing recovery rates and operational efficiency.

Aureka has confirmed that existing public roads between the Comstock site and Wedderburn Mill are sufficient for transport requirements, with further studies planned to finalize logistics. This infrastructure readiness supports Aureka’s production strategy.

Collaborative Goals with Core Prospecting

The toll milling agreement aligns with shared objectives between Aureka and Core Prospecting to maximize Wedderburn Mill’s capacity utilization. Increasing throughput is expected to reduce unit costs per tonne of ore processed, enhancing economic outcomes for both parties.

Core Prospecting’s current production from the Fiddlers Creek underground mine uses only a portion of the mill’s capacity, leaving significant room for Aureka’s projects to scale operations.

Leadership Views on the Agreement

James Gurry, Managing Director of Aureka, expressed satisfaction with securing a flexible processing solution via this agreement, highlighting the mutual benefits of collaborating with Core Prospecting to optimize Wedderburn Mill utilization.

Kenneth Bush, Director of Core Prospecting Pty Ltd, welcomed the partnership, emphasizing its potential to advance the Comstock Project alongside Core’s existing production activities.

Outlook and Investor Focus

Investors are likely to closely follow Aureka’s progress with the Comstock Gold & Silver Project, as the toll milling agreement provides a clear route to production and revenue generation, potentially increasing shareholder value.

Key upcoming milestones include completion of studies and commencement of production at Comstock, which could establish Aureka as a prominent player in Victoria’s gold mining sector.


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