The independent QP for the mineral resource estimate, as defined by NI 43‑101, is David Heyl, P.Geo. The effective date is October 31, 2022.
The estimate is reported for an underground, conventional cut and fill scenario.
The mineral resource estimate includes two resource models: 1) A block model defined for the core of the resource, estimated through the drilling and mine development; geo-statistical method is the reverse of the distance; 2) a polygonal model for some of the inferred resources based on veins outcrops and surface sampling.
The approximate cut-off grade applied to all resources is $60/t.
These Mineral Resources are not Mineral Reserves as they do not have demonstrated economic viability.
The Mineral Resource estimate follows CIM Definition Standards.
The QPs of this PEA are not aware of any known environmental, permitting, legal, title-related, taxation, socio-political, marketing, or other relevant issues that could materially affect the Mineral Resource estimate other than those disclosed in this NI 43-101 compliant Technical Report.