West Vault Mining Files on Sedar a Hasbrouck Gold Project Pre-Feasibility Study Update with a 51% IRR

NI 43-101 Compliantpositive

Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.

Why it applies: The Technical Report was prepared in conformance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects.

QP/CP Signedpositive

Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.

Why it applies: Thomas L. Dyer, P.E., and Jeff Bickel, C.P.G. of RESPEC, and others are named as Qualified Persons under NI 43-101 who reviewed and approved the information.

Measured Resourcepositive

Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.

Why it applies: The Hasbrouck Deposit includes a Measured gold resource of 6,987 K Tons at 0.019 oz Au/ton.

Indicated Resourcepositive

Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: The Hasbrouck Deposit includes an Indicated gold resource of 35,041 K Tons at 0.015 oz Au/ton.

Proven Reservepositive

Measured Resource with demonstrated economic viability after applying modifying factors.

Why it applies: The Hasbrouck Mine includes a Proven gold reserve of 6,130 K tons at 0.021 oz Au/ton.

Probable Reservepositive

Indicated Resource with demonstrated economic viability after applying modifying factors.

Why it applies: The Three Hills Mine includes a Probable gold reserve of 9,653 K tons at 0.018 oz Au/ton.

Resource Updateneutral

Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: The document provides an update to the Pre-Feasibility Study, including updated Mineral Resource and Mineral Reserve statements.

PFS-Supportingneutral

Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component.

Why it applies: The resource and reserve estimates are presented as part of a Pre-Feasibility Study update.

Cut-off Disclosedpositive

Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.

Why it applies: Cut-off grades for both Hasbrouck and Three Hills deposits are disclosed for the resource and reserve estimates.

High Recoverypositive

Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: The project reports 75% average heap-leach gold recovery, which is at the exceptional band for this processing route.

Heap Leach Routeneutral

Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.

Why it applies: The metallurgical test work indicates an average 75% gold recovery using a heap-leach process.

Free Millingpositive

Simple, clean ore amenable to standard processing without oxidation.

Why it applies: The geology is described as 'all-oxide', which typically indicates free-milling ore amenable to simpler processing.

Multi-Domain Testedpositive

Variability across ore domains (oxide, transition, fresh) has been addressed.

Why it applies: The metallurgy section mentions '13 test programs' and the resource notes refer to 'lithologic- and depth dependent recovery equation' and 'variable gold recovery based on material in Upper Siebert and Lower Siebert', indicating variability testing.