Blackrock Silver begins hydrology work at Tonopah West

Executive Summary

• Blackrock Silver Corp. has commenced Phase 2 of its advancement programs at the 100%-owned Tonopah West project in Nevada, focusing on hydrology, geotechnical evaluation, and seismic surveys to derisk the project for underground development.
• The initiatives aim to refine engineering models for an exploration decline, optimize decline design, and establish a technical foundation for permitting an initial test mine and bulk sample area.
• The company is awaiting pending assay results and an updated Preliminary Economic Assessment (PEA) for Tonopah West, currently scheduled for Q1 2026.

Key Details

• Phase 2 Hydrology Program:
  • Contracted to Montgomery and Associates.
  • Located entirely within the DPB South area of Tonopah West.
  • Involves placing five additional piezometers, one dewatering well, and one groundwater monitoring well.
  • Data will support engineering design of the decline, water pumping requirements, and site disposal strategies.
  • Follows Phase 1 data collection from four piezometers along the proposed decline alignment.
• Geotechnical Evaluation:
  • Contracted to Call & Nicholas Inc.
  • Progressing on 22 drill holes along the proposed decline alignment.
  • 17 additional drill holes are being geotechnically logged.
  • 36 samples collected for geotechnical unconfined compression strength testing.
  • Approximately 59,000 metres (193,570 feet) of core drilling evaluated for recovery and Rock Quality Designation (RQD).
• Seismic Survey:
  • Contracted to Bird Seismic Services Inc.
  • Consists of 18 kilometres of 2-D seismic data collected on seven lines.
  • Lines criss-cross the Tonopah West project area, with specific focus on the northwestern portion to identify the extension of the Fraction caldera margin under cover.
  • Goal is to understand structural controls and identify extensions of silver and gold for drill targeting.
• Strategic Context:
  • Programs are running in parallel to support the completion of an exploration decline for test mining and bulk sample extraction for metallurgical processing.
  • Updated Preliminary Economic Assessment (PEA) for Tonopah West is slated for Q1 2026.

Notable Quotes

• "Tonopah West is moving forward on multiple fronts as we work to grow, optimize and derisk the project toward underground development. The integration of hydrologic, geotechnical and seismic data from these programs represents key derisking initiatives, helping us refine engineering models, optimize decline design and establish a strong technical foundation for permitting our initial test mine and bulk sample area." — Andrew Pollard, President and CEO