Sentinel Metals Nears Drilling Start at Columbia Project with Key Permit in Final Review
Sentinel Metals is poised to launch its maiden drilling campaign at the Columbia Gold-Silver Project in Montana, pending final regulatory approval. The company also bolsters its local engagement with a strategic executive hire and advances environmental studies.
- Exploration Amendment public comment period closed, final approval due by 7 June
- Maiden ~5,000m diamond drilling program planned for May with Corexplore Drilling Services
- Inferred resource of 21.4Mt at 1.3g/t Au and 4.6g/t Ag with open depth potential
- Key environmental baseline studies underway including winter wildlife monitoring
- Krista Lee Evans appointed VP of Government and Community Relations
Final Regulatory Step Approaching for Maiden Drilling
Sentinel Metals Limited (ASX:SNM) is closing in on a significant milestone at its Columbia Gold-Silver Project in Montana, USA, with the public comment period for its Exploration Amendment now complete. This phase is the last hurdle before the Montana Department of Environmental Quality (DEQ) issues its final assessment, expected no later than 7 June 2026. The company anticipates commencing a maiden diamond drilling program of approximately 5,000 metres in May, subject to this approval.
The drilling campaign, designed to test priority targets identified through recent geophysical surveys and historical data, will be conducted by Corexplore Drilling Services, a respected North American contractor with a modern, low-emission rig. Sentinel’s approach aligns with its commitment to responsible exploration practices in a region where environmental stewardship is critical.
Project Scale and Exploration Potential
The Columbia Project hosts an inferred mineral resource of 21.4 million tonnes grading 1.3 grams per tonne gold and 4.6 grams per tonne silver, equating to around 920,000 ounces of gold and over 3 million ounces of silver within a 350-metre-wide corridor stretching 2 kilometres along strike and open at depth. Sentinel also defines an exploration target between 22 and 27 million tonnes at 1.1 to 1.4 grams per tonne gold, though this remains conceptual pending further drilling.
Historical drilling, spanning nearly 46,000 metres and over 34,000 samples, has not returned materially significant assay results but has validated geological models that underpin the current drill targets. This extensive legacy data set has been carefully reviewed and integrated into Sentinel’s exploration strategy, as outlined in its earlier new drill targets at Columbia report.
Environmental Studies and Community Engagement
Parallel to advancing drilling preparations, Sentinel has initiated key environmental baseline studies, including winter wildlife monitoring managed by Helena-based Westech Environmental Incorporated. These studies form part of a staged data collection program to support future permitting and responsible project development in compliance with U.S. wildlife legislation.
Recognising the importance of strong local relationships and regulatory navigation, Sentinel appointed Krista Lee Evans as Vice President of Government and Community Relations during the quarter. Evans brings over 20 years of experience with Montana’s environmental and natural resource agencies, enhancing Sentinel’s capacity to engage effectively with stakeholders and regulators.
Financial Position and Outlook
At quarter-end, Sentinel held approximately A$6.02 million in cash, supporting ongoing exploration activities and corporate operations. Exploration expenditure for the quarter was around A$719,000, focused on pre-drilling fieldwork and geophysical surveys. The company reported no mining or production activities during this period, consistent with its exploration-stage status.
Related party payments, including executive and director fees, amounted to approximately A$127,000. Sentinel remains on track to deliver its maiden drill program pending the DEQ’s final decision, a development that will be closely watched by investors keen to see tangible results from the Columbia Project’s promising resource and exploration potential.
Bottom Line?
Sentinel’s Columbia Project is on the cusp of its first drill program, but the final regulatory green light and initial assay results will be pivotal for validating the project’s promise.
Questions in the middle?
- Will the Montana DEQ’s final approval arrive on schedule to enable May drilling?
- How will maiden drill results influence the scale and confidence of the mineral resource?
- What further environmental or community engagement initiatives will Sentinel pursue as exploration advances?
