Dateline Resources Limited has announced significant progress in its drilling activities at the Colosseum Gold-REE Project in California. As of October 27, 2025, the company is utilizing a total of three drill rigs on site, consisting of one diamond rig and two reverse circulation (RC) rigs. An earlier sonic rig has been demobilized after completing important tailings stability assessments.
The current drilling phase is a crucial component of the Bankable Feasibility Study (BFS) focused on tailings stability, geotechnical assessments, and infill drilling. Approximately 67% of the planned 32 holes, which total around 4,257 meters (13,968 feet), have been drilled, with the program expected to conclude by November 7, 2025.
A completed sonic drilling program has affirmed that the foundation of the existing tailings storage facility is stable and capable of supporting additional infrastructure, essential for future project development. This finding will facilitate plans to reuse the tailings facility, which is expected to reduce overall water consumption and improve construction processes.
Dateline Resources is preparing to shift focus towards newly identified high-priority gold and rare earth element targets, utilizing insights gained from recent geophysical and geochemical analyses. Initial drilling on these targets is anticipated to commence in early November, with particular emphasis on gold breccia pipe targets and a designated rare earth target, labeled 2200N.
In addition to new targets, Dateline plans to conduct reverse circulation drilling on approximately one million tonnes of historical stockpiles, which are estimated to yield around 30,000 ounces of gold. Confirming the grade and continuity of this stockpile material is essential for integrating it into the overall mine plan, which would provide an early source of mill feed during the commissioning phase.
Dateline Resources is actively progressing its drilling program at the Colosseum Gold-REE Project in California. Currently, three drill rigs are operational, and the drilling is 67% complete, with a focus on critical Bankable Feasibility Study elements and newly defined gold and rare earth targets.
The sonic drilling program has successfully confirmed the stability of the tailings storage facility, which is essential for the planned mine development. This foundational stability supports the company’s strategy of expanding the tailings capacity for future use, reflecting positively on the project's feasibility.
The historical stockpile of approximately 1 million tonnes grading 1.0 g/t Au presents a significant opportunity for Dateline Resources, as it could potentially add around 30,000 ounces of gold to the project's feasibility inventory and provide an early source of mill feed.
The upcoming drilling phase will prioritise high-value targets, specifically gold breccia pipe targets and a rare earth element target. This strategic focus on newly defined targets could yield positive results, enhancing the resource potential of the Colosseum project.
Dateline's exploration strategy is closely integrated with its development plan. By advancing drilling on both infill and newly identified targets concurrently, the company aims to enhance resource confidence and expeditiously move towards mine scheduling and production planning.
The recently reported NPV of US$550 million and an IRR of 61% demonstrate the economic viability of the Colosseum Gold Project at a gold price of US$2,900/oz. These figures suggest a strong potential for return on investment, making the project an attractive opportunity for stakeholders.
Dateline is employing advanced sonic drilling technology to assess tailings stability and ensure a sustainable mining approach through dry-stacking methods. This innovation is likely to enhance environmental efficiency while optimising resource recovery.
Management’s positive outlook and proactive strategy to accelerate drilling on new targets instill confidence among investors. Their commitment to transparency and results-oriented actions indicate a solid trajectory for Dateline’s project development.