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tailings storage facilities (TSFs). The tailings from the filer presses will be approximately 13- <br /> 18%moisture,which is appropriate for good compaction in either of the two permanent TSFs in <br /> the permit area. Tails will be compacted with a percentage of waste rock in accordance with <br /> OSMI's tailings management plan. <br /> The water removed from the tailings is recycled back into the process water circuit to be used in <br /> the mill process. The mill will start without a water treatment facility. After the mill process has <br /> been refined during commissioning and actual water chemistry is known, then a zero-discharge <br /> mill water conditioning facility will be installed in the mill once approval from DRMS is <br /> obtained through a technical revision. <br /> 4 SURFACE FACILITIES <br /> Surface facilities used to support underground operations are shown on Maps C-lA and C-lB. <br /> Minor changes may be made to the proposed layouts during construction; however, construction <br /> activities including earthmoving activities are confined to the permit boundary. As part of <br /> Amendment 02, the affected lands boundary,which had been depicted as a separate boundary <br /> under prior amendments,has been matched up with the permit boundary. <br /> The majority of material excavated underground will be processed in the mill, but approximately <br /> 20%will be hauled out of the mine portal as waste rock to be stored in the waste embankment or <br /> crushed and sold as road base. <br /> A list of facilities on the surface includes: <br /> • 2 Tailings Storage Facilities (Revenue TSF and Atlas TSF) <br /> • Temporary waste rock stockpile area <br /> • Topsoil stockpile area <br /> • Passive Water Treatment System -Mine Water Ponds 91, 92, and 93 <br /> • Avalanche protection berms and cribbing <br /> • 2 Mine Equipment Storage Warehouses <br /> • Mine offices (Administrative Building) on 6" concrete foundation <br /> • Mine access road (compacted gravel) <br /> • Compressor Building on 6" concrete foundation <br /> • Solid waste storage bins (for trash). <br /> • 3 Ventilation shafts (2 of 3 are proposed and none connected to the main surface facility <br /> area) <br /> • 2 power poles <br /> • Drainage collection and diversion structures <br /> • Ventilation fan at Revenue portal <br /> • 2 Septic tanks <br /> • Tailing Press Building, Reagent Room, Compressor Room and Loadout from Mill <br /> Tunnel on 6" concrete foundation <br /> • Tailing Thickener <br /> • Proposed Tailings Thickener Super Structure <br /> Revenue Mine <br /> Amendment 02 D-15 <br /> Updated August 2022 <br />