The Project’s vein deposits and the several associated veins within the mine are classified as volcanichosted epithermal base and precious metal vein type deposits. These deposits are sometimes referred to as intermediate sulfidation epithermal deposits typically characterized as high in silver and gold with or without base metals, associated with andesite volcanism and structurally controlled.

At Virginius, chalcedonic quartz and cockscomb textures have been observed and late euhedral calcite is found in places. Fluid inclusion studies suggest that boiling did not occur in the system.

Mineralization in the District is found primarily in sub-vertical fissure veins and is classified as a telescoped epithermal quartz vein type deposit. The veins are characterized by somewhat constrained vertical extents generally less than 1,000 ft) and a vertical zoning that favors precious metals in the upper levels grading into more base-metal rich mineralization with depth.

The mineralogy found at the Project is consistent with this type of mineralization and includes galena, sphalerite, tetrahedrite, polybasite, chalcopyrite, pyrite, arsenopyrite, marcasite as well as ferroan rhodonite, calcian-ferroan rhodochrosite, quartz and chlorite.

Virginius Vein System
The most historically productive vein system at the Project is the Virginius and its northern extension, which is sometimes referred to as the Monongahela Vein. Reference to the ........

The resource models were constructed in such as way so as to model just the high grade vein structures without including mineralized material outside of the structures. In the Revenue area, the main vein and footwall veins have been modeled. The Terrible and Yellow Rose areas each have a single modeled vein. In the mining areas, the veins typically have dips around 70° but vary locally from approximately 50° to 85°.

The Virginius area 2000 level is accessed from the portal. Lower levels were historically accessed by a shaft/winze located at the 0 north/south point. Previous operators partially constructed two declines in 2014 to 2015 (Virginius South decline and Terrible decline) in an attempt to reach the 2210 level from the 2000 level; however, neither was completed. The main areas targeted for potential underground mining based on current drilling and geology. In the mining areas, the Virginius Vein widths typically range from 0.5 to 2.5 ft.

The Terrible area is located to the north of the Virginius area and has a bearing approximately 20° more westward than the Virginius area. Current identified mineralization is above the 2000 level. In the mining areas the Terrible Vein widths typically range from 0.5 to 1.5 ft.

The Yellow Rose area has been somewhat developed historically from the Revenue Virginius Tunnel. Though this vein had been mined historically with significant production at the Yellow Rose Mine, over 10,000 ft away along ........

The process plant consists of the following principal process areas (each described in more detail in the subsequent sub-sections). While the detailed design of the process upgrade completed by Barr in 2017 was for an instantaneous feed to the rod mill of 13.0 mt/h (14.4 st/h), values in this report have been adjusted for an annualized design throughput of 91,390 st/y.
• ROM Storage and Crushing;
• Primary Rod Milling;
• Secondary Ball Milling;
• Bulk Lead Rougher Flotation;
• Zinc Rougher Flotation;
• Lead Cleaner Flotation;
• Zinc Cleaner Flotation;
• Lead Concentration Thickening and Filtration;
• Zinc Concentration Thickening and Filtration;
• Tailings Thickening and Filtration;
• Reagent Mixing, Storage and Distribution;
• Raw Water Storage and Distribution;
• Process Water Storage and Distribution; and
• HP and LP Air Services.

The primary products from the process plant include:
• A lead conce ........