Redcastle Resources Confirms Mining Continues Amid Wiluna Processing Disruption

Redcastle Resources Flags Processing Disruption at Wiluna, Mining Operations Continue Uninterrupted

Redcastle Resources Wiluna processing disruption mining continues to be a developing story as the company (ASX: RC1) has issued an update advising investors of a temporary disruption to processing operations at the Wiluna Gold Mine. This is the facility scheduled to treat ore from its Redcastle-BML Ventures Joint Venture (RB JV). The update follows an incident at Wiluna Mining Corporation's (WMC) processing plant on Saturday, 25 July 2026, and provides important context for shareholders monitoring the company's near-term production pathway.

Importantly, RC1 has confirmed that mining and stockpiling operations at both the Redcastle Reef and Queen Alexandra gold deposits are continuing as normal. The disruption is isolated to third-party processing infrastructure, not RC1's own mining activities.

What Happened and What It Means for RC1

Just before 10:00am on Saturday, 25 July 2026, one of the Carbon-in-Leach (CIL) tanks at Wiluna Gold Mine's processing plant ruptured, spilling slurry into the plant's containment bund and surrounding processing area. According to WMC's announcement released on 27 July 2026:

• The spill was contained within the plant's bund, with no reported impact on the adjacent environment
• No injuries were sustained, and all personnel were withdrawn from the affected area and accounted for
• The site emergency plan was activated immediately following the incident
• All processing operations have been temporarily suspended pending a structural engineering assessment
• Structural engineers were scheduled to arrive on site from Monday, 27 July 2026, to conduct a full evaluation
• Surface operations, underground rehabilitation, and diamond drilling at Wiluna are continuing as normal, with processing plant staff redirected to other tasks

For RC1, the practical consequence is that ore scheduled for processing at the Wiluna plant cannot currently be treated. Furthermore, RC1 has stated it is awaiting further information from joint venture partner BML Ventures regarding any potential impact on RB JV activities.

Understanding the RB JV Structure

What Is the Redcastle-BML Ventures Joint Venture?

RC1 operates the Redcastle Gold Project through a joint venture with BML Ventures (BML). Under this arrangement, ore mined from RC1's Redcastle Reef and Queen Alexandra deposits was scheduled to be toll-treated — meaning processed for a fee — at Wiluna Mining Corporation's processing plant. RC1 does not own the processing infrastructure itself; it relies on the WMC plant as a third-party toll treatment facility arranged through BML.

This distinction matters considerably for investors. RC1's mining activities — being the extraction and stockpiling of ore — sit within the JV and remain operational. The processing step, which occurs further downstream in the production chain, is the piece currently paused.

A Quick Glossary for Investors

Mining Continues as Stockpile Builds

One of the more reassuring aspects of the Redcastle Resources Wiluna processing disruption mining continues narrative is the explicit confirmation that both the Redcastle Reef and Queen Alexandra deposits are still being actively mined and stockpiled. This indicates:

• Ore extraction is not dependent on plant availability
• The company is continuing to build a stockpile that can be processed once the Wiluna plant resumes operations or an alternative pathway is confirmed
• There is no indication of any disruption to RC1's ground-level mining activities

The operational continuity at the mine site preserves near-term production optionality and, consequently, limits the immediate operational impact on RC1, even as the processing question remains unresolved.

What Comes Next: Key Watchpoints for Investors

RC1 is currently in a monitoring and assessment phase. The key milestones and decision points investors should track include the following.

WMC Engineering Assessment

Structural engineers commenced their site evaluation from 27 July 2026. Their findings are expected to determine the extent of damage and the likely repair timeline for the Wiluna plant.

WMC Processing Restart Timeline

WMC has stated it will update on restart timing once the site has been fully assessed. This represents the critical near-term variable for RC1's processing pathway.

BML Guidance to RC1

RC1 is awaiting formal advice from JV partner BML regarding any impact on RB JV activities. This guidance may include information on contingency processing arrangements.

Further RC1 ASX Update

Investors should expect a follow-up RC1 announcement once clarity is received from BML and WMC on the path forward. In addition, any contingency arrangements that emerge could significantly shape the company's near-term production outlook.

RC1's Broader Project Portfolio

While near-term attention is on the processing disruption, it is worth noting the broader foundation RC1 has established. The company holds a sizeable Eastern Goldfields tenement package, providing layers of exploration and development potential beyond the immediate RB JV activity:

• 85 exploration and mining tenement interests, including granted tenements, pending applications, and tenements subject to the Kilkenny Earn-In and Joint Venture Agreement, covering approximately 150 km² across the Eastern Goldfields of Western Australia
• Mineral Resources at Queen Alexandra and Redcastle Reef, both reported in accordance with the JORC Code
• Nearby exploration targets including Morgan's Castle East, Sligo, Coronation, South Queen and Battery Lode, providing additional exploration and development upside
• The TBone Belt and Kilkenny Belt Package as further portfolio components

This tenement base means the company's investment case is not solely dependent on the near-term processing pathway through Wiluna.

Why Investors Should Keep Watching RC1

The Wiluna processing disruption is an external, third-party event that RC1 is navigating through its JV partner BML. The company's update reflects a position of operational resilience — mining has not stopped, ore is being stockpiled, and the company is awaiting formal guidance before drawing conclusions about longer-term impact.

For investors, the points worth noting are as follows:

• No injuries and no reported environmental impact from the WMC incident, according to WMC's own announcement
• RC1's own mining activities remain unaffected, with the stockpile continuing to grow
• The resolution timeline depends on WMC's engineering assessment, which is now underway
• RC1 is seeking clarity from BML and has indicated it will update the market as further information comes to hand
• The broader 150 km² Eastern Goldfields portfolio provides additional depth beyond the current JV activities

However, it is the confirmation that the Redcastle Resources Wiluna processing disruption mining continues without interruption that provides the most immediate reassurance. As WMC works through its engineering assessment and BML provides JV guidance, the near-term focus for RC1 investors is on the processing restart timeline and any contingency arrangements that may emerge.

"Redcastle Resources has moved to inform the market of a third-party processing disruption, while confirming that its own mining operations remain fully active. The company's continued mining and stockpiling activity preserves its operational position while clarity is sought."

Want to Know More About Redcastle Resources and Its Eastern Goldfields Portfolio?

With mining and stockpiling operations continuing uninterrupted across the Redcastle Reef and Queen Alexandra deposits, and a 150 km² Eastern Goldfields tenement package underpinning the company's broader investment case, RC1 represents a developing story worth following closely. To learn more about Redcastle Resources, its joint venture activities, and its project pipeline, visit the company's official website at redcastle.net.au.