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EXHIBIT D: MINE PLAN <br /> Contents <br /> 1 Introduction..........................................................................................................................................3 <br /> 2 Mining Methods....................................................................................................................................3 <br /> 3 Underground Operations......................................................................................................................3 <br /> 3.1 Drifts and Tunnels.........................................................................................................................4 <br /> 3.2 Raises............................................................................................................................................4 <br /> 3.3 Ventilation.....................................................................................................................................6 <br /> 3.4 Resue Mining Method...................................................................................................................7 <br /> 3.5 Explosives and Blasting.................................................................................................................7 <br /> 3.6 Ore Handling.................................................................................................................................8 <br /> 4 Mill Operations .....................................................................................................................................8 <br /> 4.1 Crushing......................................................................................................................................10 <br /> 4.2 Lead Circuit .................................................................................................................................11 <br /> 4.3 Zinc Circuit...................................................................................................................................11 <br /> 4.4 Tailings ........................................................................................................................................12 <br /> 5 Surface Facilities..................................................................................................................................12 <br /> 5.1 Surface Mine Equipment ............................................................................................................13 <br /> 5.2 Waste Rock and Tailings Management.......................................................................................14 <br /> 5.2.1 Revenue TSF........................................................................................................................15 <br /> 5.2.2 Atlas TSF..............................................................................................................................16 <br /> 5.3 Waste Rock Storage....................................................................................................................16 <br /> 5.4 Soil Excavation and Stockpile Areas............................................................................................16 <br /> 5.5 Fuel and Oil Storage Areas and Reagent Storage.......................................................................17 <br /> 5.6 Mine Equipment Storage and Shop Building..............................................................................17 <br /> 5.7 Personnel Facilities and Compressor Building............................................................................17 <br /> 5.8 Designated Parking and Storage Areas.......................................................................................17 <br /> 5.9 Mine Access Roads......................................................................................................................17 <br /> 5.10 Utilities........................................................................................................................................18 <br /> 5.11 Waste Storage.............................................................................................................................18 <br /> 5.12 Surface Drainage Treatment and Control...................................................................................18 <br /> 6 Operational Timeline ..........................................................................................................................18 <br /> Revenue Mine <br /> Amendment 02 D-1 <br /> December 2021 <br />