Kootenay Silver files Columba 43-101 technical report

Executive Summary

• Kootenay Silver filed a NI 43‑101 technical report announcing its first‑ever mineral resource estimate for the 100% owned Columba silver project in Chihuahua, Mexico.
• The inferred underground resource totals 5.92 Mt at 284 g/t Ag, containing 54.1 Moz of silver, plus lead and zinc credits.
• Drilling has recommenced (Phase 7) to extend all mineralized zones both down‑dip and along strike, indicating ongoing exploration upside.

Key Details

• Technical Report: “Technical Report on the Maiden Mineral Resource Estimate for the Columba Ag‑Pb‑Zn Project,” dated Aug 1 2025; filed on SEDAR+.
• Resource Summary (base‑case cut‑off 150 g/t Ag):
• Inferred resources – 5.92 Mt grading 284 g/t Ag, 0.19 % Pb, 0.50 % Zn.
• Contained metals – 54.1 Moz Ag, 25.2 M lb Pb, 65.6 M lb Zn (excludes mined‑out F‑vein material).
• Vein Coverage: 17 epithermal veins incorporated in the estimate; historic mining limited to the F vein (~100,000 t previously extracted).
• Drilling Program: Phase 7 started this week; aims to extend all mineralized structures open in every direction. Over 53,000 m of drilling completed to date across >200 holes.
• Geology Highlights: Classic high‑grade epithermal vein system within a volcanic caldera; veins traced over ~4 km × 3 km area, vertical extent ≥350 m, potential depth >700 m. Grades increase with depth, especially below 1,750 m ASL (“grade line”).
• QA/QC: Core cut in half, sampled under strict QA/QC; blanks every ~100 samples, standards every ~25 samples, duplicates twice per hole; analysis by ALS Minerals (Chihuahua) and ALS Vancouver using ICP and fire‑assay methods.
• Qualified Persons: Resource estimated by Ben Eggers, MAIG, PGeo (SGS); peer‑reviewed by Allan Armitage, PhD, PGeo (SGS). Kootenay’s VP Exploration Dale Brittliffe reviewed technical information (not independent).
• Access Agreement: 24‑year surface access agreement with annual and other payments, permitting both exploration and future exploitation.

Notable Quotes

“We are extremely happy with the first‑ever mineral resource estimate at Columba. We are also pleased to announce that drilling has recommenced at Columba. Our drilling plan includes extension drilling on all mineralized structures still open in all directions.” – James McDonald, President & CEO